The effects of a new fertilization method-NDSA(nitrogen depot with saturated ammonium) on the loss of nitrogen from ammonia volatilization and N leaching were studied by imitation experiments.

采用室内模拟氨挥发和模拟降雨土柱淋洗方法，研究了NDSA（饱和铵贮库）施肥法对降低氨挥发和氮素淋失的作用。

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Besides, we discussed the effects of different fertilization period on the principles of Urea-N transformation and transport under drip-irrigation in this paper.

并初步讨论了滴灌条件下不同灌溉施肥时段对尿素转化运移规律的影响。

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It is of great importance to study the growth and nitrogen(N) uptaking by cotton for optimizing soil salinity, irrigation and fertilization strategies with drip irrigation under film.

在膜下滴灌条件下，进行了不同氮肥滴灌施肥方式和土壤盐度对棉花生长和氮素吸收影响的田间试验。

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