A complete control type plant factory has high efficiency in terms of cultivation area by constructing vertical multiple layered cultivation beds.However,it has a problem of irregular crop growth due to temperature de...A complete control type plant factory has high efficiency in terms of cultivation area by constructing vertical multiple layered cultivation beds.However,it has a problem of irregular crop growth due to temperature deviation at upper and lower beds and increases in energy consumption by a prolonged cultivation period.In this work,air flow rate inside a facility was improved by a hybrid control of air flow devices like air conditioning and air circulation fan with an established wireless sensor network to minimize temperature deviations between upper and lower beds and to promote crop growth.The performance of proposed system was verified with an experimental environment or Case A wherein air conditioning device was operated without a control algorithm and Case B wherein air conditioning and circulation fans were alternatively operated based on the hybrid control algorithm.After planting leafy vegetables under each experimental condition,crops were cultivated for 21 days.As a result,Case B wherein AC(air conditioning) and ACF(air-circulation fan) were alternatively operated based on the hybrid control algorithm showed that fresh mass,number of leaves,and leaf length for the crops grown were increased by 40.6%,41.1%,and 11.1%,respectively,compared to Case A.展开更多
Based on the principles of system engineering,economics theory and local conditionof production,studies carried out by taking“quadratic-regression-orthogonal-rotational” and ran-domized complete block designs to det...Based on the principles of system engineering,economics theory and local conditionof production,studies carried out by taking“quadratic-regression-orthogonal-rotational” and ran-domized complete block designs to determine the Optimal Agronomical Practices Package（OAPP）for Wheat Modelized Cultivation Management（WMCM）by system decision-makinganalysis.The OAPP was expected to meet various goals of different levels of yield and economicbenefit of middle and high fertility land in Beijing area.Taking cultivar JINGDONG-1（"JD-1"）asan example,the OAPP for grain yield≥6750 kg/ha and net benefit≥360 US （?）/ha was consist-ed as follows:density=195 plants/m<sup>2</sup>;spring irrigation times=4（stem elongation,booting,flowering,and 20 days after anthesis）;fertilization=150-188 kg N/ha,113-128 kg P<sub>2</sub>O<sub>5</sub>/ha.展开更多
With the development of China's economy,the improvement of international influence,the adoption of"Belt and Road"strategy and the continuous development of foreign exchanges,the demand for intercultural ...With the development of China's economy,the improvement of international influence,the adoption of"Belt and Road"strategy and the continuous development of foreign exchanges,the demand for intercultural communication is increasing with the growth of international interaction. Chinese people are the main force of international communication in the future and we will shoulder the important duty of spreading Chinese culture. So it is very important to cultivate people's competence of intercultural communication. The competence refers to not only the language itself but also the bilateral cultures. The paper firstly implies the significance of intercultural awareness under the background of"Belt and Road"strategy. The second part is related to the literature reviewof intercultural communication. And it goes to the achievements of "Belt and Road"and the strategies of cultivating intercultural consciousness. According to the research,one point should be clear,that is,the cultivation of cultural consciousness is very important in intercultural communication in the progress of"Belt and Road".展开更多
Background The critical period of weed control(CPWC) refers to the period of time during the crop growth cycle when weeds must be controlled to prevent yield losses.Ultra-narrow row(UNR) is a method of planting of cot...Background The critical period of weed control(CPWC) refers to the period of time during the crop growth cycle when weeds must be controlled to prevent yield losses.Ultra-narrow row(UNR) is a method of planting of cotton in rows that are 25 cm or less apart.Amongst cultural techniques for weed control,the use of narrow row spacing is considered to be a most promising approach that can effectively suppress weed growth and provide greater yields in cotton.This cultivation system can shorten the length of the critical weed-crop interference duration and results in greater yield.The current research aimed to determination of critical time of weed control in cotton(Gossypium hirsutum L.) under conventional and ultra-narrow row spacing conditions.Field experiments were arranged as factorial experiment in a randomized complete block design with three replications.Factors were cultivation system(conventional(50 cm row spacing) and ultra narrow row(25 cm row spacing and weed treatment including 30,45,60,and 75 days weeding after emergence during the growing season(weed free),and 30,45,60,and 75 without weeding(weed infested) in the growing season along with weedy and weed-free from sowing to harvesting.A four-parameter loglogistic model was fit to the two sets of relating relative crop yield to data obtained from increasing durations of weed interference and lengths of weed-free period.Results In both years and cultivation systems,the relative yield of cotton decreased with the increasing duration of weed-interference but increased with the increasing duration of weed-free period.Ultra-narrow row cultivation delayed the beginning of the CPWC in cotton.Under ultra-narrow row condition,the CPWC ranged from 21 to 99 days after germination in 2021 and 23 to 91 days in 2022 based on the 5% acceptable yield loss.Under conventional cultivation CPWC ranged from 17 to 102 days after emergence in 2021 and 18 to 95 days after emergence in 2022.Conclusions Under both conventional and Ultra-narrow row conditions,weed interference reduces seed yield.Under ultra-narrow row condition,weed interference until 21.1–23.5 days after cotton emergence and under conventional condition,weed interference until 16.9–18.5 days after cotton emergence had not significant reduction on cotton yield.展开更多
In soybean cotyledonary transformation,Agrobacterium infection is influenced by many factors.The cultivation stage of Agrobacterium strain and infectious concentration were studied in this research.Results showed that...In soybean cotyledonary transformation,Agrobacterium infection is influenced by many factors.The cultivation stage of Agrobacterium strain and infectious concentration were studied in this research.Results showed that the highest rate of resistant shoots was obtained when the strain cultivation concentration was OD 600 =0.6,and the infectious concentration was OD 600 =0.5.Seven soybean cultivars in North China were also screened for high susceptibility to Agrobacterium and three genotypes were found to be s...展开更多
Farmers as the largest population group in China, their integrity levels impact the process of socialist modernization and construction of socialist harmonious society directly. Farmers＇ credit construction is an imp...Farmers as the largest population group in China, their integrity levels impact the process of socialist modernization and construction of socialist harmonious society directly. Farmers＇ credit construction is an important part of the construction of new socialist countryside. As the subject of construction of new socialist countryside, some farmers are weak in credit awareness. Low credibility of traditional culture, uncompleted credit system construction and farmers＇ narrow thoughts led to their lacking of credit awareness. We should perfect the rural credit system, strengthen the construction of rural credit culture and enhance the construction of grass-roots credit administration, set integrity example model and take other measures to promote farmers＇ awareness of the integrity.展开更多
With the continuous development of global integration and frequent exchanges between countries,heterogeneous cultural conflicts grow as a result.A good ability of cross-cultural communication is playing an important p...With the continuous development of global integration and frequent exchanges between countries,heterogeneous cultural conflicts grow as a result.A good ability of cross-cultural communication is playing an important part in resolving these contradictions and conflicts.Cultural empathy is an important factor of cross-cultural communication ability,and is the key factor to the smooth and successful cross-cultural communication.Cultural empathy needs to follow the moderate principle—neither"missing"nor"excessive".This article discusses the connotation of cultural empathy from the basic connotation of cross-cultural communication,i.e.following the principle of moderation will be helpful in multicultural communication across cultural differences through multi-channel cultivation and,with agreement to disagree,to achieve effective cross-cultural communication.展开更多
Cumulative effects on wetland soils under different cultivation patterns were analyzed in the experimental fields of the Ecological Experimental Station of Mire-wetlands in Sanjiang Plain. The results suggested that t...Cumulative effects on wetland soils under different cultivation patterns were analyzed in the experimental fields of the Ecological Experimental Station of Mire-wetlands in Sanjiang Plain. The results suggested that the paddy field combined with the glebe to act on the soil environment. Under the combination of natural and anthropological factors, the cultivation of the paddy field and the glebe obviously related with different kinds of fertility factors of soil. The remarkable relation among organic matter, total nitrogen and available nitrogen reflected the fertilization of the soil at some extent.展开更多
Nitrogen(N)and phosphorus(P)are mineral nutrients essential for plant growth and development,playing a crucial role throughout the plant life cycle.Cotton,a globally significant textile crop,has a particularly high de...Nitrogen(N)and phosphorus(P)are mineral nutrients essential for plant growth and development,playing a crucial role throughout the plant life cycle.Cotton,a globally significant textile crop,has a particularly high demand for N fertilizer across its developmental stages.This review explores the effects of adequate or deficient N and P levels on cotton growth phases,focusing on their influence on physiological processes and molecular mechanisms.Key topics include the regulation of N-and P-related enzymes,hormones,and genes,as well as the complex interplay of N-and P-related signaling pathways from the aspects of N-P signaling integration to regulate root development,N-P signaling integration to regulate nutrient uptake,and regulation of N-P interactions—a frontier in current research.Strategies for improving N and P use efficiency are also discussed,including developing high-efficiency cotton cultivars and identifying functional genes to enhance productivity.Generally speaking,we take model plants as a reference in the hope of coming up with new strategies for the efficient utilization of N and P in cotton.展开更多
With development of IT application and economic globalization, the world is becoming flat. In this flat world, how to adapt to this new competition en.ironment for higher education and how to culti.ate the IT talents ...With development of IT application and economic globalization, the world is becoming flat. In this flat world, how to adapt to this new competition en.ironment for higher education and how to culti.ate the IT talents with the international competition ability are the significant issues worth well our tremendous attention and recognition. Through exploration and implementation of the multiform de.elopment policy for international collaboration, the School of Computer Science and Technology, and School of Software in Harbin Institute of Technology are fully engaging in the establishment of the first le.el internationalized computer education system and the culti.ation of IT talents with the international competition ability, so as to enhance the international competition ability of China in this education internationalized flat world.展开更多
A group of G.hirsutum L.varieties and theirhybrids F<sub>1</sub> were studied on two fields withdifferent mineral supply conditions:optimalmineral supply and without fertilizers.Thereliable genotypic intra...A group of G.hirsutum L.varieties and theirhybrids F<sub>1</sub> were studied on two fields withdifferent mineral supply conditions:optimalmineral supply and without fertilizers.Thereliable genotypic intraspecies polymorphism ofresponse to the different level of mineralnutrition was identified.An individual展开更多
基金Work(NRF-2012H1B8A2026145)supported by the Human Resource Training Program for Regional Innovation through the Ministry of Education and National Research Foundation of KoreaProject(2015K000281)supported by the Functional Districts of the Science Belt Support Program,Ministry of Science,ICT and Future Planning,Korea
文摘A complete control type plant factory has high efficiency in terms of cultivation area by constructing vertical multiple layered cultivation beds.However,it has a problem of irregular crop growth due to temperature deviation at upper and lower beds and increases in energy consumption by a prolonged cultivation period.In this work,air flow rate inside a facility was improved by a hybrid control of air flow devices like air conditioning and air circulation fan with an established wireless sensor network to minimize temperature deviations between upper and lower beds and to promote crop growth.The performance of proposed system was verified with an experimental environment or Case A wherein air conditioning device was operated without a control algorithm and Case B wherein air conditioning and circulation fans were alternatively operated based on the hybrid control algorithm.After planting leafy vegetables under each experimental condition,crops were cultivated for 21 days.As a result,Case B wherein AC(air conditioning) and ACF(air-circulation fan) were alternatively operated based on the hybrid control algorithm showed that fresh mass,number of leaves,and leaf length for the crops grown were increased by 40.6%,41.1%,and 11.1%,respectively,compared to Case A.
文摘Based on the principles of system engineering,economics theory and local conditionof production,studies carried out by taking“quadratic-regression-orthogonal-rotational” and ran-domized complete block designs to determine the Optimal Agronomical Practices Package（OAPP）for Wheat Modelized Cultivation Management（WMCM）by system decision-makinganalysis.The OAPP was expected to meet various goals of different levels of yield and economicbenefit of middle and high fertility land in Beijing area.Taking cultivar JINGDONG-1（"JD-1"）asan example,the OAPP for grain yield≥6750 kg/ha and net benefit≥360 US （?）/ha was consist-ed as follows:density=195 plants/m<sup>2</sup>;spring irrigation times=4（stem elongation,booting,flowering,and 20 days after anthesis）;fertilization=150-188 kg N/ha,113-128 kg P<sub>2</sub>O<sub>5</sub>/ha.
基金supported by the research of Shaanxi philosophy and social science planning office(Grant NO.2018J17)the Research Foundation of Shaanxi provincial department of education(Grant NO.16JK1293)
文摘With the development of China's economy,the improvement of international influence,the adoption of"Belt and Road"strategy and the continuous development of foreign exchanges,the demand for intercultural communication is increasing with the growth of international interaction. Chinese people are the main force of international communication in the future and we will shoulder the important duty of spreading Chinese culture. So it is very important to cultivate people's competence of intercultural communication. The competence refers to not only the language itself but also the bilateral cultures. The paper firstly implies the significance of intercultural awareness under the background of"Belt and Road"strategy. The second part is related to the literature reviewof intercultural communication. And it goes to the achievements of "Belt and Road"and the strategies of cultivating intercultural consciousness. According to the research,one point should be clear,that is,the cultivation of cultural consciousness is very important in intercultural communication in the progress of"Belt and Road".
文摘Background The critical period of weed control(CPWC) refers to the period of time during the crop growth cycle when weeds must be controlled to prevent yield losses.Ultra-narrow row(UNR) is a method of planting of cotton in rows that are 25 cm or less apart.Amongst cultural techniques for weed control,the use of narrow row spacing is considered to be a most promising approach that can effectively suppress weed growth and provide greater yields in cotton.This cultivation system can shorten the length of the critical weed-crop interference duration and results in greater yield.The current research aimed to determination of critical time of weed control in cotton(Gossypium hirsutum L.) under conventional and ultra-narrow row spacing conditions.Field experiments were arranged as factorial experiment in a randomized complete block design with three replications.Factors were cultivation system(conventional(50 cm row spacing) and ultra narrow row(25 cm row spacing and weed treatment including 30,45,60,and 75 days weeding after emergence during the growing season(weed free),and 30,45,60,and 75 without weeding(weed infested) in the growing season along with weedy and weed-free from sowing to harvesting.A four-parameter loglogistic model was fit to the two sets of relating relative crop yield to data obtained from increasing durations of weed interference and lengths of weed-free period.Results In both years and cultivation systems,the relative yield of cotton decreased with the increasing duration of weed-interference but increased with the increasing duration of weed-free period.Ultra-narrow row cultivation delayed the beginning of the CPWC in cotton.Under ultra-narrow row condition,the CPWC ranged from 21 to 99 days after germination in 2021 and 23 to 91 days in 2022 based on the 5% acceptable yield loss.Under conventional cultivation CPWC ranged from 17 to 102 days after emergence in 2021 and 18 to 95 days after emergence in 2022.Conclusions Under both conventional and Ultra-narrow row conditions,weed interference reduces seed yield.Under ultra-narrow row condition,weed interference until 21.1–23.5 days after cotton emergence and under conventional condition,weed interference until 16.9–18.5 days after cotton emergence had not significant reduction on cotton yield.
基金Supported by New Variety Breeding Key Project of Genetic Modified Organisms (2008ZX08004-002)Special Research Fund from Harbin Technology and Science Innovation (2008RFQXN013)Postdoctoral Fund and Doctoral Fund of Northeast Agricultural University
文摘In soybean cotyledonary transformation,Agrobacterium infection is influenced by many factors.The cultivation stage of Agrobacterium strain and infectious concentration were studied in this research.Results showed that the highest rate of resistant shoots was obtained when the strain cultivation concentration was OD 600 =0.6,and the infectious concentration was OD 600 =0.5.Seven soybean cultivars in North China were also screened for high susceptibility to Agrobacterium and three genotypes were found to be s...
文摘Farmers as the largest population group in China, their integrity levels impact the process of socialist modernization and construction of socialist harmonious society directly. Farmers＇ credit construction is an important part of the construction of new socialist countryside. As the subject of construction of new socialist countryside, some farmers are weak in credit awareness. Low credibility of traditional culture, uncompleted credit system construction and farmers＇ narrow thoughts led to their lacking of credit awareness. We should perfect the rural credit system, strengthen the construction of rural credit culture and enhance the construction of grass-roots credit administration, set integrity example model and take other measures to promote farmers＇ awareness of the integrity.
基金supported by the projects of“On the Translation of Shaanxi Dialect”(No.2017K003)“A Survey of Shaanxi Dialect’s Translation——A Case of Dialects in Jia Pingwa’s Works”(No.18JK0126)。
文摘With the continuous development of global integration and frequent exchanges between countries,heterogeneous cultural conflicts grow as a result.A good ability of cross-cultural communication is playing an important part in resolving these contradictions and conflicts.Cultural empathy is an important factor of cross-cultural communication ability,and is the key factor to the smooth and successful cross-cultural communication.Cultural empathy needs to follow the moderate principle—neither"missing"nor"excessive".This article discusses the connotation of cultural empathy from the basic connotation of cross-cultural communication,i.e.following the principle of moderation will be helpful in multicultural communication across cultural differences through multi-channel cultivation and,with agreement to disagree,to achieve effective cross-cultural communication.
基金Supported by Chinese Youth Natural Sciences Fund Project(40501030)
文摘Cumulative effects on wetland soils under different cultivation patterns were analyzed in the experimental fields of the Ecological Experimental Station of Mire-wetlands in Sanjiang Plain. The results suggested that the paddy field combined with the glebe to act on the soil environment. Under the combination of natural and anthropological factors, the cultivation of the paddy field and the glebe obviously related with different kinds of fertility factors of soil. The remarkable relation among organic matter, total nitrogen and available nitrogen reflected the fertilization of the soil at some extent.
基金supported by Supported by National Key Laboratory of Cotton Bio-breeding and Integrated Utilization(CB2023C07)Xinjiang Autonomous Region"Three Agricultural"Backbone Talent Training Program(2022SNGGNT024)Xinjiang Huyanghe City Science and Technology Program(2023C08).
文摘Nitrogen(N)and phosphorus(P)are mineral nutrients essential for plant growth and development,playing a crucial role throughout the plant life cycle.Cotton,a globally significant textile crop,has a particularly high demand for N fertilizer across its developmental stages.This review explores the effects of adequate or deficient N and P levels on cotton growth phases,focusing on their influence on physiological processes and molecular mechanisms.Key topics include the regulation of N-and P-related enzymes,hormones,and genes,as well as the complex interplay of N-and P-related signaling pathways from the aspects of N-P signaling integration to regulate root development,N-P signaling integration to regulate nutrient uptake,and regulation of N-P interactions—a frontier in current research.Strategies for improving N and P use efficiency are also discussed,including developing high-efficiency cotton cultivars and identifying functional genes to enhance productivity.Generally speaking,we take model plants as a reference in the hope of coming up with new strategies for the efficient utilization of N and P in cotton.
文摘With development of IT application and economic globalization, the world is becoming flat. In this flat world, how to adapt to this new competition en.ironment for higher education and how to culti.ate the IT talents with the international competition ability are the significant issues worth well our tremendous attention and recognition. Through exploration and implementation of the multiform de.elopment policy for international collaboration, the School of Computer Science and Technology, and School of Software in Harbin Institute of Technology are fully engaging in the establishment of the first le.el internationalized computer education system and the culti.ation of IT talents with the international competition ability, so as to enhance the international competition ability of China in this education internationalized flat world.
文摘A group of G.hirsutum L.varieties and theirhybrids F<sub>1</sub> were studied on two fields withdifferent mineral supply conditions:optimalmineral supply and without fertilizers.Thereliable genotypic intraspecies polymorphism ofresponse to the different level of mineralnutrition was identified.An individual
