Background The mulch-free subsurface drip irrigation system demonstrated water-saving potential as an alternative to traditional mulch-based drip irrigation while also eliminating residual film pollution at source.How...Background The mulch-free subsurface drip irrigation system demonstrated water-saving potential as an alternative to traditional mulch-based drip irrigation while also eliminating residual film pollution at source.However,delayed sowing is unavoidable in mulch-free cultivation in ecological regions with a short frost-free period.Intercropping with cumin,which has a shorter growth period,served as an effective strategy to improve land use efficiency during the early growth stages of cotton.Therefore,a two-year field experiment was conducted to study the effects of intercropping cumin at the seeding rate of 2.5(ID1),3.85(ID2),and 5.2(ID3)kg・hm−2 on cotton growth,interspecies competition,fiber quality,and water use efficiency(WUE),as well as system economic benefits under subsurface drip irrigation.Monocropping cotton was used as the control(CK)treatment.Results At the initial flowering(IF)stage(the end of the co-growth period of cotton and cumin),cotton plant height in ID2 and ID3 treatments decreased by 5.93%–16.53%and 10.87%–31.11%,respectively,cotton stem diameter by 11.41%–14.25%and 3.37%–26.49%,respectively,and vegetative biomass by 14.46%–30.65%and 22.59%–49.91%,respectively,compared with CK treatment.With the increase in cumin density,the crop growth rate(CGR)and compensation effect in cotton tended to significantly decrease at the IF stage regardless of organs considered.For the non-co-growth period(after harvesting cumin),cotton reproductive organ biomass in ID2 and ID3 treatments increased by 4.09%‒14.61%at the boll opening stage,crop growth rate in reproductive organs by 20.74%and 74.26%from peak boll to boll opening stages compared with CK treatment,due to an enhancement of 19.09%and 49.30%in the compensation effect.Compared with ID1,the aggressivity treated by ID2 and ID3 decreased by 12.82%–46.34%and 17.95%–31.71%,respectively.However,owing to a greater number of green bolls in the upper canopy at the harvest stages in the ID3 treatment,the system production value(closely related to yield)treated by ID2 was 11.69%–16.89%,6.56%–20.02%,and 16.48%–59.83%greater than that of the ID1,ID3,and CK treatments,respectively.This also led to the highest WUE and net profit under the ID2 treatment.Conclusion Intercropping cumin with medium density improved the cotton biomass accumulation characteristics and increased resources such as land and water utilization efficiency and economic benefits through a stronger compensation effect after harvesting cumin under subsurface drip irrigation without mulch.This study not only provides alternatives to residual film pollution in arid cotton fields but also establishes a sustainable agro-ecological-economic planting paradigm by reducing plastic use and enhancing water and fertilizer use efficiency,holding significant implications for advancing resource-efficient agricultural systems.展开更多
This paper includes three parts: (1) The main characteristics of knowledge economics in new era; (2) Innovation management is an inevitable trend; (3) Corporate culture lead literary excellence. With the advance of sc...This paper includes three parts: (1) The main characteristics of knowledge economics in new era; (2) Innovation management is an inevitable trend; (3) Corporate culture lead literary excellence. With the advance of science technique and development of productive force , huma nity entered on knowledge economics era.It is a new social economic pattern that occupy and coordinate intellectual resources and causes some essential changes of produce method. Investment pattern, industrial construction, through idea and social organization. Since these changes, the traditional management method don’t meet the need of new times and make some trouble to the enterprise, and then innovation managemen t yield and give good function for knowledge economic era. Adhere to some scienc e create regulation; Accord with the times requirement; Raise output rate and pr omote society productivity; Need a process of time and guard against impetuosity . The application of innovation management to enterprise produce marked success in which corporate culture leads literary excellence.展开更多
运用Cite Space V软件对2001-2015年CNKI、Web of Science数据库中的国内和国际教育经济学专业期刊《教育与经济》与Economics of Education Review的文献进行可视化分析,获得如下主要研究结论:(1)21世纪以来国内教育经济学研究热点随...运用Cite Space V软件对2001-2015年CNKI、Web of Science数据库中的国内和国际教育经济学专业期刊《教育与经济》与Economics of Education Review的文献进行可视化分析,获得如下主要研究结论:(1)21世纪以来国内教育经济学研究热点随着时间段的推移,趋于分散与多元。"十五"教育发展规划期间的研究热点为"加入WTO"、"税费改革"背景下的义务教育和高等教育事业发展问题;"十一五"期间的研究热点为高校人才培养与农村义务教育、教育公平等问题;"十二五"期间研究热点更加多元,涉及中等职业教育、普通高中教育、学前教育等领域教育财政投入问题以及高校毕业生就业、过度教育、性别差异及歧视等问题。国际教育经济学研究热点在2001-2015年期间呈收缩状态,变化较小。人力资本、高等教育、教育效率、学生学业成绩始终是国际教育经济学研究热点;(2)2001-2015年间,国内教育经济学研究前沿问题包括产权理论的应用以及农村义务教育问题,而国际教育经济学研究前沿集中于学生学业成绩及其影响因素问题,教育需求、教育与经济发展的关系、薪酬问题也是这一时期国际教育经济学的研究前沿。展开更多
Steven Cheung＇s economics which bases on individual benefits maximization of New Classical Economics as internal core and adding some constraint conditions such as transaction costs,property rights and contract as pr...Steven Cheung＇s economics which bases on individual benefits maximization of New Classical Economics as internal core and adding some constraint conditions such as transaction costs,property rights and contract as protective belts, derives a series of testable hypothesis in order toget the general paradigm of economic explanation. It follows the fundamental assumptions of stablepreference and rational choice in Mill Paradigm and Marshall Paradigm, but it adds the Coase Revolution of transaction costs constraint. As a result, its explanation capability is beyond SamuelsonParadigm and New Keynes Paradigm. So, Economic Explanation Paradigm is the same with MillParadigm, Marshall Paradigm, Samuelson Paradigm and New Keynes Paradigm, which should beconsidered to be an important synthesis in the history of economic thought.展开更多
The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of ...The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of landscape of flower sea construction are also even fewer.Therefore,it is imperative to introduce and screen the plant resources suitable for cold regions to create the landscape of flower sea.The rape,an oilseed crop,was used as a research object in order to create a productive flower landscape with both ornamental and economic values in cold regions.Four rape flower varieties,Qingza No.5,7,9,and 11,were introduced from Qinghai Hufeng Agricultural Science and Technology Group Co.,Ltd.They were planted in the experimental practice base of Northeast Agricultural University in three batches.Development characteristics and seed yield of rape flowers on different sowing dates were studied.The fuzzy probability method was used to comprehensively evaluate the varieties.The results showed that the rape flowers grew well in Harbin City during the experimental sowing period,which could form a good landscape of flower sea and had a considerable rapeseed yield.It could be widely used in cold urban and rural areas,such as Harbin City.In view of the experimental results,the strategies of creating a productive landscape of rape flower sea were proposed and the economic benefits were analyzed.It could change the status quo of a uniform landscape of flower sea in cold regions,help the development of rural tourism,and promote local economic income.展开更多
Economics has undergone two stages including classical economics and neo-classical econom-ics.However,to some extent it cannot explain the current new economic phenomena theoreticallv or bv model analysis.This paper p...Economics has undergone two stages including classical economics and neo-classical econom-ics.However,to some extent it cannot explain the current new economic phenomena theoreticallv or bv model analysis.This paper puts forward the concept post-classical economics for the first time.Its foundation of value view is humanism and its methodological foundation is discretism.This paper gives the definition of discretism.discusses data rationality,data cost,and enterprises’boundary at micro leve1.and then builds Discrete Growth Model whose core is institution at macro leve1.The main aim of post.classical economies is t0 Doint out that modern economic society is now in the process of discrete deconstruction and holographic reconstruction.The center of gravity of great social production shifts from material to spirit and the resource scarcity shifts from ex-ternal material to internal life time.Lastly,this paper introduces three branches of applied economics of Dost-classical economics:network economics.data economics and platform economics.展开更多
According to the basic principles of institutional economics,the Constitutional system is the underlying causes to promote the economic development.The CPC Central Committee is the source of motivation to promote econ...According to the basic principles of institutional economics,the Constitutional system is the underlying causes to promote the economic development.The CPC Central Committee is the source of motivation to promote economic development by the startup mechanism of Constitution am endment,and the political interpretation of the Constitution is the basic way to promote economic development.The economic development in China has challenged the Constitutional system,calling for the appropriate adjustments to the Constitutional system so as to maintain the sustainable and stable development of the economy in China.展开更多
基金supported by the National Natural Science Foundation of China(31250512).
文摘Background The mulch-free subsurface drip irrigation system demonstrated water-saving potential as an alternative to traditional mulch-based drip irrigation while also eliminating residual film pollution at source.However,delayed sowing is unavoidable in mulch-free cultivation in ecological regions with a short frost-free period.Intercropping with cumin,which has a shorter growth period,served as an effective strategy to improve land use efficiency during the early growth stages of cotton.Therefore,a two-year field experiment was conducted to study the effects of intercropping cumin at the seeding rate of 2.5(ID1),3.85(ID2),and 5.2(ID3)kg・hm−2 on cotton growth,interspecies competition,fiber quality,and water use efficiency(WUE),as well as system economic benefits under subsurface drip irrigation.Monocropping cotton was used as the control(CK)treatment.Results At the initial flowering(IF)stage(the end of the co-growth period of cotton and cumin),cotton plant height in ID2 and ID3 treatments decreased by 5.93%–16.53%and 10.87%–31.11%,respectively,cotton stem diameter by 11.41%–14.25%and 3.37%–26.49%,respectively,and vegetative biomass by 14.46%–30.65%and 22.59%–49.91%,respectively,compared with CK treatment.With the increase in cumin density,the crop growth rate(CGR)and compensation effect in cotton tended to significantly decrease at the IF stage regardless of organs considered.For the non-co-growth period(after harvesting cumin),cotton reproductive organ biomass in ID2 and ID3 treatments increased by 4.09%‒14.61%at the boll opening stage,crop growth rate in reproductive organs by 20.74%and 74.26%from peak boll to boll opening stages compared with CK treatment,due to an enhancement of 19.09%and 49.30%in the compensation effect.Compared with ID1,the aggressivity treated by ID2 and ID3 decreased by 12.82%–46.34%and 17.95%–31.71%,respectively.However,owing to a greater number of green bolls in the upper canopy at the harvest stages in the ID3 treatment,the system production value(closely related to yield)treated by ID2 was 11.69%–16.89%,6.56%–20.02%,and 16.48%–59.83%greater than that of the ID1,ID3,and CK treatments,respectively.This also led to the highest WUE and net profit under the ID2 treatment.Conclusion Intercropping cumin with medium density improved the cotton biomass accumulation characteristics and increased resources such as land and water utilization efficiency and economic benefits through a stronger compensation effect after harvesting cumin under subsurface drip irrigation without mulch.This study not only provides alternatives to residual film pollution in arid cotton fields but also establishes a sustainable agro-ecological-economic planting paradigm by reducing plastic use and enhancing water and fertilizer use efficiency,holding significant implications for advancing resource-efficient agricultural systems.
文摘This paper includes three parts: (1) The main characteristics of knowledge economics in new era; (2) Innovation management is an inevitable trend; (3) Corporate culture lead literary excellence. With the advance of science technique and development of productive force , huma nity entered on knowledge economics era.It is a new social economic pattern that occupy and coordinate intellectual resources and causes some essential changes of produce method. Investment pattern, industrial construction, through idea and social organization. Since these changes, the traditional management method don’t meet the need of new times and make some trouble to the enterprise, and then innovation managemen t yield and give good function for knowledge economic era. Adhere to some scienc e create regulation; Accord with the times requirement; Raise output rate and pr omote society productivity; Need a process of time and guard against impetuosity . The application of innovation management to enterprise produce marked success in which corporate culture leads literary excellence.
文摘运用Cite Space V软件对2001-2015年CNKI、Web of Science数据库中的国内和国际教育经济学专业期刊《教育与经济》与Economics of Education Review的文献进行可视化分析,获得如下主要研究结论:(1)21世纪以来国内教育经济学研究热点随着时间段的推移,趋于分散与多元。"十五"教育发展规划期间的研究热点为"加入WTO"、"税费改革"背景下的义务教育和高等教育事业发展问题;"十一五"期间的研究热点为高校人才培养与农村义务教育、教育公平等问题;"十二五"期间研究热点更加多元,涉及中等职业教育、普通高中教育、学前教育等领域教育财政投入问题以及高校毕业生就业、过度教育、性别差异及歧视等问题。国际教育经济学研究热点在2001-2015年期间呈收缩状态,变化较小。人力资本、高等教育、教育效率、学生学业成绩始终是国际教育经济学研究热点;(2)2001-2015年间,国内教育经济学研究前沿问题包括产权理论的应用以及农村义务教育问题,而国际教育经济学研究前沿集中于学生学业成绩及其影响因素问题,教育需求、教育与经济发展的关系、薪酬问题也是这一时期国际教育经济学的研究前沿。
文摘Steven Cheung＇s economics which bases on individual benefits maximization of New Classical Economics as internal core and adding some constraint conditions such as transaction costs,property rights and contract as protective belts, derives a series of testable hypothesis in order toget the general paradigm of economic explanation. It follows the fundamental assumptions of stablepreference and rational choice in Mill Paradigm and Marshall Paradigm, but it adds the Coase Revolution of transaction costs constraint. As a result, its explanation capability is beyond SamuelsonParadigm and New Keynes Paradigm. So, Economic Explanation Paradigm is the same with MillParadigm, Marshall Paradigm, Samuelson Paradigm and New Keynes Paradigm, which should beconsidered to be an important synthesis in the history of economic thought.
基金the National Nature Science Foundation of China(31770437)。
文摘The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of landscape of flower sea construction are also even fewer.Therefore,it is imperative to introduce and screen the plant resources suitable for cold regions to create the landscape of flower sea.The rape,an oilseed crop,was used as a research object in order to create a productive flower landscape with both ornamental and economic values in cold regions.Four rape flower varieties,Qingza No.5,7,9,and 11,were introduced from Qinghai Hufeng Agricultural Science and Technology Group Co.,Ltd.They were planted in the experimental practice base of Northeast Agricultural University in three batches.Development characteristics and seed yield of rape flowers on different sowing dates were studied.The fuzzy probability method was used to comprehensively evaluate the varieties.The results showed that the rape flowers grew well in Harbin City during the experimental sowing period,which could form a good landscape of flower sea and had a considerable rapeseed yield.It could be widely used in cold urban and rural areas,such as Harbin City.In view of the experimental results,the strategies of creating a productive landscape of rape flower sea were proposed and the economic benefits were analyzed.It could change the status quo of a uniform landscape of flower sea in cold regions,help the development of rural tourism,and promote local economic income.
文摘Economics has undergone two stages including classical economics and neo-classical econom-ics.However,to some extent it cannot explain the current new economic phenomena theoreticallv or bv model analysis.This paper puts forward the concept post-classical economics for the first time.Its foundation of value view is humanism and its methodological foundation is discretism.This paper gives the definition of discretism.discusses data rationality,data cost,and enterprises’boundary at micro leve1.and then builds Discrete Growth Model whose core is institution at macro leve1.The main aim of post.classical economies is t0 Doint out that modern economic society is now in the process of discrete deconstruction and holographic reconstruction.The center of gravity of great social production shifts from material to spirit and the resource scarcity shifts from ex-ternal material to internal life time.Lastly,this paper introduces three branches of applied economics of Dost-classical economics:network economics.data economics and platform economics.
文摘According to the basic principles of institutional economics,the Constitutional system is the underlying causes to promote the economic development.The CPC Central Committee is the source of motivation to promote economic development by the startup mechanism of Constitution am endment,and the political interpretation of the Constitution is the basic way to promote economic development.The economic development in China has challenged the Constitutional system,calling for the appropriate adjustments to the Constitutional system so as to maintain the sustainable and stable development of the economy in China.
