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首页> 外文期刊>Sustainable Agriculture Research >Optimizing Soil Moisture and Nitrogen Use Efficiency of Some Maize (Zea mays) Varieties under Conservation Farming System
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Optimizing Soil Moisture and Nitrogen Use Efficiency of Some Maize (Zea mays) Varieties under Conservation Farming System

机译：保护性耕作制度下玉米（Zea mays）品种水分和氮素利用效率的优化

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p class="sar-body"In Zambia, small holder farmers depend on producing maize (Zea mays), which is a major staple food for many Zambians. Maize productivity among the smallholder farmers is quite low, giving only 2.3 tons per hectare. The low yields are attributed to insufficient and erratic rain fall, low soil fertility, and poor farming practices. Therefore, the objective of this study was to evaluate the performance of maize genotypes for nitrogen use efficiency and soil moisture utilisation under conservation farming system. The trials were carried out at two sites with different soil types. Three maize varieties i.e. ZMS 606, GV 640 and GV 635 were evaluated in maize – cowpea rotation. Four cowpea varieties used for rotation with maize, i.e. Bubebe Lutembwe, BB 14-16-2-2 and LT 11-3-3-12. BB 14-16-2-2 and LT 11-3-3-12 are mutation-derived lines of Bubebe and Lutembwe cowpea parent varieties respectively. The experimental design used was split plot with three replications. The NUE was significantly (P 0.05) higher in CF and accounted for 27 % and 15% more than conventional farming system which valued 17% and 3% at Chisamba and Batoka, respectively. while soil moisture content was higher at Batoka than Chisamba in CF system. ZMS 606 and GV 640 varieties were superior over GV 635 for NUE. Cowpea variety BB 14-16-2-2 significantly increased NUE of maize varieties. Therefore, smallholder farmers in Zambia can increase maize productivity in maize - cowpea rotation system due to the increased NUE. Recommendations are made for farmers to select improved nitrogen efficient maize varieties to optimize productivity of maize in conservation farming system.
机译：class =“ sar-body”>在赞比亚，小农户依靠玉米（Zea mays）生产玉米，这是许多赞比亚人的主要主食。小农户的玉米生产率很低，每公顷仅产生2.3吨。单产低是由于降雨不足和降雨不稳定，土壤肥力低下以及耕作方式差。因此，本研究的目的是评估保护性耕作制度下玉米基因型对氮素利用效率和土壤水分利用的表现。试验是在两个具有不同土壤类型的地点进行的。在玉米– pea豆轮作中评估了三个玉米品种，即ZMS 606，GV 640和GV 635。用于与玉米轮作的四种cow豆品种，即Bubebe Lutembwe，BB 14-16-2-2和LT 11-3-3-12。 BB 14-16-2-2和LT 11-3-3-12分别是Bubebe和Lutembwe pea豆亲本变异的衍生系。使用的实验设计是具有三个重复的分割图。 CF的NUE值显着提高（P <0.05），比常规耕作系统的Chisamba和Batoka分别占17％和3％的值高27％和15％。 Batoka地区的CF系统土壤水分含量高于Chisamba。对于NUE，ZMS 606和GV 640品种优于GV 635品种。 pea豆品种BB 14-16-2-2显着提高了玉米品种的NUE。因此，由于NUE增加，赞比亚的小农户可以提高玉米-cow豆轮作系统中的玉米生产力。建议农民选择改良的高氮效率玉米品种，以优化保护性耕作系统中的玉米生产力。

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