There was a significant positive correlation between the accumulated nitrogen amount at elongation stage and applied N before sowing.
拔节期氮积累量与基肥施氮量呈极显著正相关，拔节-开花期与总施氮量及追肥施氮量呈极显著正相关。
Soil microbial biomass C, N declined significantly in early restoration stage compared with shrub communities, and increased with the extension of plant restoration.
土壤微生物生物量C、N在植被恢复的初期显著低于灌丛，而后随着恢复的进行逐步增长。
Total-N was declined with different speed during the exhausted stage. Farm manure, chemical fertilizer and straw had different sustainable effects.
进入耗竭阶段后，土壤全氮又不同程度的下降，只是不同处理变化速度不同而已。
The differences of the biomass N in different treatments in same stage were mainly caused by difference in fertilizers.
各处理在同一生育期微生物量氮差异的原因主要是所施肥料种类的不同。
In the 4th stage larvae, the length of mouth cavity of A. duodenale is almost equivalent to its width, but that of N. americanus is shorter.
十二指肠钩虫第4期幼虫口腔的长宽几乎相等，但美洲钩虫宽大于长。
Accumulation of n, P, K and sugar was increased during seed-filling stage in Ceratoides.
驼绒藜属植物种子形成过程中，N、P、K、糖等营养物质积累呈增加的趋势。
Two tandem systems of two-stage SBR process were proposed for P and N removal to improve the single stage SBR.
在充分分析单级SBR工艺在生物除磷脱氮过程中存在的不足的基础上，提出了两种两级SBR串联运行的除磷脱氮工艺模式。
At the mean time, D fertilizer particle microcapsules were made with higher content of K but median content of N to meet the demands of tobacco plant at middle and later stage and promote maturity.
同时，为满足烟株中后期的养分需求及促进成熟落黄，制作重钾适氮的缓释肥包膜D粒子。
This implied that the relatively high risk of N and P losses through leaching and runoff in Taihu Lake region during season of wheat growth could probably occur after earing stage of the wheat growth.
太湖地区小麦生长季节土壤氮磷向水体迁移的环境风险在小麦抽穗期后相对较高。
To apply all the N fertilizer in jointing stage gave best results. The combined application of N and K can increase yield by 42.2%, and N only 25.9%.
另外，增产效果与氮肥施用时期有关，在拔节期一次施氮效果最好，氮钾配施增产42 ．2 ％ ，单施氮增产25 ．9 ％ 。
This paper presents details of the electric principle and method of design of an N-stage adaptive reversible ring circuit.
本文介绍一种N级适应式可逆环形电路的原理和设计方法。
The spatial and time discretizations of the N-S controlling formulation were introduced. And four-stage Runge-Kutta iterative method of time discretization was introduced.
介绍了控制方程的空间离散和时间离散及时间项的四阶龙格库塔迭代法；
The results of 15N tracing showed that the fertilizer-N uptake in rice plant and grain of two varieties increased with the advance of growth stage.
示踪结果显示，两个品种水稻植株和籽粒吸收肥料氮，都随着生育期的推移而逐渐增加。
The soil mineralized N at each tobacco growth stage was significantly higher in the control than in the N fertilization treatment.
不施氮处理土壤氮素矿化量在各生育期均显著高于施氮处理；
The N absorption proportion after silking stage was 40.30%-47.78% of the total, so it was important to provide maize plants with sufficient N in later growth stage for realizing super-high-yield.
超高产夏玉米吐丝后氮素吸收积累量占总积累量的40.30%-47.78%，保证后期氮素养分充足供应对于夏玉米达到超高产水平至关重要；
The N absorption proportion after silking stage was 40.30%-47.78% of the total, so it was important to provide maize plants with sufficient N in later growth stage for realizing super-high-yield.
超高产夏玉米吐丝后氮素吸收积累量占总积累量的40.30%-47.78%，保证后期氮素养分充足供应对于夏玉米达到超高产水平至关重要；
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