This study aimed to develop a water-extraction system which could produce the fresh water from the air in arid regions and which used renewable energies as the electric power source. In this paper, the experiments for...This study aimed to develop a water-extraction system which could produce the fresh water from the air in arid regions and which used renewable energies as the electric power source. In this paper, the experiments for water extraction from the air were carried out by using the novel multi-stage water-extraction device with Peltier deices for two cases of temperature and related humidity of the air. One was the case where the temperature and the related humidity of the air were constant, and the other was the case where they were simulated the variation of the temperature and related humidity of the air in a day of summer and spring in Loess Plateau, China. The effects of the temperature and related humidity of the atmospheric air and supply the electric power to Peltier devices on performance of water production of the device were investigated and reported.展开更多
The issue of agricultural land sustainability is important to every part of the world, especially in the developing countries. Based on the data collected by field investigation and laboratory analysis as well as soil...The issue of agricultural land sustainability is important to every part of the world, especially in the developing countries. Based on the data collected by field investigation and laboratory analysis as well as soil classification theory, the authors discuss the applications of soil series in the arid northwestern China. On the one hand, the application in the layout of rational agricultural of oasis farmlands: (1) two soil series,namely,Lanjiabao (main) and Nijiaxiaying, belong to the moderate and extremely arid region in the study area; accordingly, the layout of crops is the spring wheat and maize (main) and winter wheat;(2) Nijiaxiaying (main) and Lanjiabao, however, fall into the warm-cold and extremely arid region, where the winter wheat (main) and spring wheat grow; and (3) the Shangfusi is part of the warm chilly-arid region, which is used as seasonal pastureland. On the other hand, the application on the soil quality of oasis farmlands, the results indicating that among all soil series, the content of N is very low, however, the content of K is abundant, and the content of P is greatly scarce.展开更多
为研究保水剂对干旱荒漠区沙枣生长的影响,以凹凸棒保水剂和羟甲基纤维素钠(CMC)植物纤维粘合剂2种保水剂为试验材料,采用随机区组设计,设空白对照(CK)、F1(40 g凹凸棒保水剂与定植穴内土混合均匀)、F2(80 g凹凸棒保水剂与定植穴内土混...为研究保水剂对干旱荒漠区沙枣生长的影响,以凹凸棒保水剂和羟甲基纤维素钠(CMC)植物纤维粘合剂2种保水剂为试验材料,采用随机区组设计,设空白对照(CK)、F1(40 g凹凸棒保水剂与定植穴内土混合均匀)、F2(80 g凹凸棒保水剂与定植穴内土混合均匀)、F3(15 g CMC植物纤维粘合剂与定植穴内土混合均匀)、F4(30 g CMC植物纤维粘合剂与定植穴内土混合均匀)、F5(40 g凹凸棒保水剂撒施于定植穴底)、F6(80 g凹凸棒保水剂撒施于定植穴底)、F7(15 g CMC植物纤维粘合剂撒施于定植穴底)和F8(30 g CMC植物纤维粘合剂撒施于定植穴底)共9个处理,测定沙枣成活率及新梢生长量,并计算成本。结果表明,2种保水剂均能提高沙枣成活率和新梢生长量,其中F2的促进效果较佳,沙枣成活率为94%,新梢生长量较CK、F1、F3、F4、F5、F6、F7、F8分别提高25.7、11.5、12.8、8.4、22.3、19.4、23.7、22.0 cm;各处理的成本由低到高依次为F5<F6<F1<F2<F7<F3<F8<F4,分别为87、91、121、125、173、207、261和296元/667 m^(2)。综合表明,80 g凹凸棒保水剂与定植穴内土混合均匀施用对沙枣成活率和新梢生长量的促进效果较佳,且经济成本相对较低,可在同类地区生产实践中推广应用。展开更多
文摘This study aimed to develop a water-extraction system which could produce the fresh water from the air in arid regions and which used renewable energies as the electric power source. In this paper, the experiments for water extraction from the air were carried out by using the novel multi-stage water-extraction device with Peltier deices for two cases of temperature and related humidity of the air. One was the case where the temperature and the related humidity of the air were constant, and the other was the case where they were simulated the variation of the temperature and related humidity of the air in a day of summer and spring in Loess Plateau, China. The effects of the temperature and related humidity of the atmospheric air and supply the electric power to Peltier devices on performance of water production of the device were investigated and reported.
基金The study was sponsored by the parts of knowledge innovation engineeringCAS (No.KZCX3 -SW-3 2 4) +1 种基金the statekey technologies research and development program (No.2 0 0 2 BA5 17A11) national fund of natural science (GrantNo.90 2 0 2 0 15
文摘The issue of agricultural land sustainability is important to every part of the world, especially in the developing countries. Based on the data collected by field investigation and laboratory analysis as well as soil classification theory, the authors discuss the applications of soil series in the arid northwestern China. On the one hand, the application in the layout of rational agricultural of oasis farmlands: (1) two soil series,namely,Lanjiabao (main) and Nijiaxiaying, belong to the moderate and extremely arid region in the study area; accordingly, the layout of crops is the spring wheat and maize (main) and winter wheat;(2) Nijiaxiaying (main) and Lanjiabao, however, fall into the warm-cold and extremely arid region, where the winter wheat (main) and spring wheat grow; and (3) the Shangfusi is part of the warm chilly-arid region, which is used as seasonal pastureland. On the other hand, the application on the soil quality of oasis farmlands, the results indicating that among all soil series, the content of N is very low, however, the content of K is abundant, and the content of P is greatly scarce.
文摘为研究保水剂对干旱荒漠区沙枣生长的影响,以凹凸棒保水剂和羟甲基纤维素钠(CMC)植物纤维粘合剂2种保水剂为试验材料,采用随机区组设计,设空白对照(CK)、F1(40 g凹凸棒保水剂与定植穴内土混合均匀)、F2(80 g凹凸棒保水剂与定植穴内土混合均匀)、F3(15 g CMC植物纤维粘合剂与定植穴内土混合均匀)、F4(30 g CMC植物纤维粘合剂与定植穴内土混合均匀)、F5(40 g凹凸棒保水剂撒施于定植穴底)、F6(80 g凹凸棒保水剂撒施于定植穴底)、F7(15 g CMC植物纤维粘合剂撒施于定植穴底)和F8(30 g CMC植物纤维粘合剂撒施于定植穴底)共9个处理,测定沙枣成活率及新梢生长量,并计算成本。结果表明,2种保水剂均能提高沙枣成活率和新梢生长量,其中F2的促进效果较佳,沙枣成活率为94%,新梢生长量较CK、F1、F3、F4、F5、F6、F7、F8分别提高25.7、11.5、12.8、8.4、22.3、19.4、23.7、22.0 cm;各处理的成本由低到高依次为F5<F6<F1<F2<F7<F3<F8<F4,分别为87、91、121、125、173、207、261和296元/667 m^(2)。综合表明,80 g凹凸棒保水剂与定植穴内土混合均匀施用对沙枣成活率和新梢生长量的促进效果较佳,且经济成本相对较低,可在同类地区生产实践中推广应用。
