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The amount of nitrogen needed from BNF sources is then, determined by the difference between total N assimilation requirements and N taken up from mineral sources in the soil. 而所需要的来自生物固氮的氮量就由总的氮素吸收需要量和土壤中矿质来源的氮素吸收量的差值来确定。
In the total N absorbed by crops 33.9% was absorbed by wheat and 66.1% by corn. 带田适宜施氮量为385.;5 kg hm-2:在作物总吸收N量中;被小麦吸收的氮占33
The total N, NAN and microbial N passing the abomasum had increasing trend. 试验期1昼夜通过皱胃的总氮量为14.;27克;非氨氮(NAN)13
There were positive correlation between SOC and total N, available N and C:N. 苜蓿草地有机碳与全氮、碱解氮及C:N之间均为正相关关系。
The total N 2O emission from forest ecosystem may be underestimated if plants can emit N 2O under natural condition. 如果树木在自然状态下能排放N2 O ,那么森林生态系统的N2 O排放可能被低估。
The content of total N and total P in rainfall could be increased by Pinus tabulaeformis and Rhus typhina. 油松、火炬能够增加降雨中总氮、总磷的含量。
The highest ratio of the fertilizer N to total N in plant was found in rosette stage, and then it declined slowly. 同时，施氮量越多，各个时期各部位和整株中肥料氮的比例越大，且均在团棵期达到最大值；
The approximate enrichment ratio of OM and total N was lower than the ratio of alkali-hydrolyzable N. 有机质与全氮的富集率基本一致，碱解氮的富集率较高。
The soil organic matter and total N stabilize basically, available P increase while alkaline hydrolyze N decrease obviously in the cornrice rotation. 玉米、稻连作土壤有机质和全氮基本稳定，有效磷呈上升趋势，碱解氮和速效钾下降趋势明显。
We have taken part in inter laboratory comparisons of total N and + 15 N abundance determination proficiency testing organized by FAO/IAEA . 参加了由FAO/IAEA组织的全氮和15N丰度检测能力验证的实验室国际间的比对 .
The content of Total N, Total P and Total K of Cole respectively increases 16.8%, 20.7%, 8.5% comparing with the area of reference. 固氮菌肥对油菜植株养分的影响较为明显;油菜植株含氮、含磷、含钾含量比对照区分别增加了16.;8%25、20
The dynamic changes of total N, chlorophyll, soluble sugar contents were correlative with pod shape and dry matter accumulate process. 果皮与种子的生理代谢进程不同 ,二者的全氮、叶绿素以及可溶性糖含量的动态变化与角果形态及干物质积累转化进程有明显的相关性。
Then the body comfort indices for tour n different part of Shandong were evaluated. 进一步评价了山东各地的旅游人体舒适度，并提出了山东各季节的最佳旅游区域。
The results showed that organic matter (OM), total N and alkali-hydrolyzable N enriched apparently, but total P and available P did not enrich. 结果表明：土壤受侵蚀后，有机质、全氮和碱解氮流失的“富集”现象明显，而全磷和速效磷却无明显的“富集”现象。
A square matrix of n rows and columns,cells contain n different symbols so arranged that no symbol occurs more than once in any row or column. 由N组行列组成的正方形矩阵，包含N个不同符号且每个符号都在任何一行和一列中只出现一次的单元格。
The contents of total N, total P and OM were closely related to combined humus, but the contents of total K and CEC were not. 3种结合态腐殖质中，紧结合态与红壤养分（全氮、全磷和有机质）的相关性最高。
Corn economic yield and biological yield were significantly related with soil organic matter, total N, alkali-hydrolyzable N, total P, and availabl P. 玉米产量及生物量与土壤有机质、全氮、碱解氮、全磷、速磷相关性达极显著或显著相关。
Urease activity may indicate the fertilizer level of total N, alkaline N, and organic matter in vegetable garden and orchard. 脉酶活性可表征果园地、菜园土的全氮、碱解氮和有机质的肥力水平。
The soil organic matter and total N stabilize basically,available P increase while alkaline hydrolyze N decrease obviously in the cornrice rotation. 玉米、水稻连作土壤有机质和全氮基本稳定，有效磷呈上升趋势，碱解氮和速效钾下降趋势明显。
Acacia tree species increased significantly the content of total N and total C and the increment of topsoil of sandy land was significant. 相思树种明显地增加了沿海沙地土壤中全氮和全碳的含量,且增加的量以沙地土壤的表层最为显著。