氮素进入植物体而构成氨基酸。
氮素转化过程主要由微生物参与。
SummarySoil nitrogen transformations are mainly participated by microorganisms.
中度放牧可提高牧草对氮素的利用率。
氨挥发是植物体氮素损失的重要途径。
Ammonia volatilization is a major path of nitrogen losses from plants.
尿素作为氮素给源普遍地应用于叶面喷布。
Urea is commonly used as the source of nitrogen in foliage sprays.
而在轻度水分胁迫下，氮素的施用效果较好。
Compensative effects of nitrogen were evident under mild water stress.
氮素利用效率与作物生育期降水量有很大关系。
Nitrogen using efficiency mainly relates with precipitation during crop growth stage.
氮素是与全球环境变化密切相关的重要元素之一。
Nitrogen is one of the important elements correlated with changing closely in global environment.
铵的矿物固定和吸附是土壤氮素循环中的重要环节。
The fixation and adsorption of ammonium are important parts of nitrogen recycle in soils.
对稻田土壤施外源氮对氮素矿化的影响进行了研究。
The influence of applying nitrogen fertilizer to nitrogen mineralization was studied in paddy soil.
以上研究为膜孔灌溉农田氮素高效利用研究奠定基础。
These researches have laid a foundation for efficiently utilizing nitrogen in film hole irrigation.
不同生育期大豆植株氮素含量日变化动态有一定差异。
There was difference in daily changes of the nitrogen content of soybean plant.
在氮供应不足的条件下，氮素是蔬菜产量的限制因子。
When the nitrogen supply was not enough, it was main limiting factor of vegetable yield.
因此，秸秆施用是保持和提高土壤氮素营养的有效措施。
Therefore, straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.
目前堆肥过程中氮素损失比较严重，通常达到50%左右。
Whereas rate of nitrogen losing during composting has been high to be 50%.
8个上规模的牡蛎养殖场就可以从切萨皮克湾海水中净化出1吨氮素。
Eight large-scale oyster farms could clean a ton of nitrogen from the Chesapeake.
拔节至抽穗期干旱胁迫极显著地降低冬小麦的氮素营养效率。
The drought stress from jointing to heading stage decreased nitrogen nutrition efficiency of winter wheat significantly.
氮素和水分是维持水稻高产和获得较高经济效益的主要因素。
Nitrogen and water are major factors for maintaining crop yield, getting better economic return.
籽粒氮含量变化呈“V”型曲线，籽粒氮素积累呈“S”型。
The dynamic change in grain nitrogen content showed a V shape, and S shape in nitrogen accumulation.
日本新研制的被覆氮素肥料，具有先进的氮素溶释调控性能。
The new manufactured coated nitrogenous fertilizers in Japan were characterized by the advanced controllable release of nitrogen.
这些结果为解决煤矸石复垦中氮素缺乏的问题提供了有效途径。
These two approaches were effective for solving the shortage of nitrogen in planting on coal gangue.
这可以从有机物质、氮素的循环和土壤肥力因素的改善得到证明。
This could be confirmed by the organic matter and nitrogen circulation and the improvement of soil fertility.
但首先因为氮是一种肥料，它有利于那些能最大化利用氮素进行生长的野生植物。
But primarily, because nitrogen is a fertiliser, it favours wild plants that can maximise the use of nitrogen to help them grow.
森林土壤氮素转化与循环在森林生态系统功能中占有极其重要的意义。
Nitrogen transformation and cycling in forest soils are of signification importance to the function of forest ecosystems.
最后，拉普拉塔河把氮素和富含铁质的沉淀物搬运到在图中所示地域以北的海洋。
Finally, the Rio DE la Plata deposits nitrogen and iron-laden sediment into the ocean just north of the area shown in the image.
叶片是前期组织氮素的重要贮存器官和籽粒灌浆中氮素的主要供给源。
The leaf was the major storage organ for nitrogen and the source of nitrogen for grain filling.
通过田间试验研究了包膜肥料ZP氮素释放特点和在夏玉米上施用效果。
The nitrogen release character of ZP coated fertilizer and its effect on summer maize were studied by field plot test.
随着营养液中氮素形态比例的不同，作物吸收的氮素营养亦会发生明显改变。
The nitrogen nutrition absorbed by rice change apparently with different proportion of different nitrogen form in the water culture.
秋季贮藏蛋白质的积累可能与光周期、温度、水分和氮素的供应量直接相关。
The vegetative storage protein accumulation in fall may be directly related to the photoperiod, accommodation of n, temperature and water.
泥沙氮素含量随着产流时间的延长呈下降趋势，而流失累积量测呈逐渐增大趋势。
With delay of runoff yield time, the nitrogen concentrations in runoff and sediment drop off, whereas, the accumulation amounts of nitrogen loss rise gradually.
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