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- 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。
- Available N in the field was significantly correlated with the number of soil bacteria and of actinomycetes. 分析结果还表明，有效氮与放线菌、有效氮与细菌数量变化呈显著相关关系。
- A cooperative application of N, P and K can increas e the co ntents of organic matter, available N, av... N、P、K配施处理土壤有机质、速效氮、速效磷和速效钾增幅较大。
- The organic matter and available N, P, K in HPR field were decreased significantly than those in rice field. 2．夏季种植杂交狼尾草比种植水稻消耗了更多的土壤有机质和速效养分，不利于后作的生长。
- The result showed that the soil available N content of the vineyard a low and in grade 5 while that was in grade 3 in the kaleyard. 结果显示：东丽区葡萄园的速效氮含量较低，处于5级；
- Available N deficit is highest while accumulated available P is lowest in Salsola nitraria Pall among the six halophytes. 6种植物中，钠猪毛菜根际土有效氮亏缺最高，有效磷富集也最少。
- It is concluded that, in comparison with FIF, DIF significantly decreased the leaching loss of urea-N from soil, and increased the available N in soil. 滴灌施肥显著地减少了尿素态氮的淋溶损失，增加了土壤中有效态氮的含量。
- Available N and P have inverse dynamics in that while available N decreases, available P increases, except for Phragmites communis Trin. 根际土有效态养分的变化则与全态相反，6种植物的根际土有效氮含量均显著低于非根际土，除芦苇外，根际土有效磷含量均高于非根际土。
- N mineralization, extractable mineral N or the use of a non-fixing legume or grass to measure available N supply are useful tools to account for the soil N variable. 氮矿化、可浸提的矿质氮以及利用不固氮的豆类植物或禾本科来测量氮供应均是解释土壤N变量的有用手段。
- Available N, P. K, Ca, Zn, Mn contents in rbinispberic soil under artificial pure korean pine forest were lower than those under nalinul korean pine forest aix! 天然林红松针叶含K、Ca、Mg、Zn、Fe、Mn等元素较丰富，人工纯林和人工混交林红松针叶含量相对较少； 人工纯林红松叶含N、P、Cu等元素较多。
- Rhizospheric soil available N, enzyme activities and bacteria related to N transformation under drought stress in two genotypes of maize were investigated with a pot experiment. 摘要通过盆栽试验，研究了干旱胁迫下两基因型玉米根际有效态N及其两种相关酶活性和细菌的变化。
- The content soil available N, P and K and soil bulk density of vineyard in Dough and kaleyard in Beichen were analyzed in order to enhance crop yield and quality. 摘要为了提高作物的产量和品质，做到配方施肥，采集了天津市东丽地区葡萄园和北辰区菜园土壤样本，测定了土壤速效氮、速效磷、速效钾的含量以及土壤容重。
- SM increased soil organic matter and available N, P, and K to varying degrees and PM didn't, while soil organic matter in the surface layer decreased in PM treatment. 地膜覆盖兼有显著的增温效应，而秸秆覆盖土壤温度却明显低于对照，但在冬季低温短日照条件下，地膜覆盖土壤温度反而低于秸秆覆盖；
- The contents of available N, K in the different growth stages of later-rice under different patterns of straw returning to field (SRF) were tested respectively in the experiment. 设计了高桩翻耕抛栽、覆盖免耕抛栽和高桩免耕抛栽3种模式的田间小区试验。
- The results there are significant positive correlations between soil organic matter, total N, available N, available K, urease, invertase, alkaline-phosphatase and catalase. 结果表明：土壤有机质、全氮、碱解氮、速效钾、脲酶、蔗糖酶、碱性磷酸酶和过氧化氢酶之间均呈极显著正相关；
- Li S X, Li S Q.Effect of different treatment with water and fertilizer on available N and P in dryland[J].Agricultural research in the arid areas,1995, 13(1): 7-13. [1]李生秀;李世清.;不同水肥处理对旱地土壤速效氮、磷养分的影响[J]
- Jiao X G, Liang W J, Chen L J, Jiang Y, Wen D Z.Effects of urease/nitrification inhibitors on soil available N and microbial biomass N and on N uptake of wheat. 焦晓光;梁文举;陈利军;姜勇;闻大中.;脲酶/硝化抑制剂对土壤有效态氮、微生物量氮和小麦氮吸收的影响
- NH4C depletion in the pore water concentration and low N/P ratios (3.7 by weight) within the macrophyte biomass at the end of the growing period suggest that available N limits plant growth. 孔隙水浓度中NH4C的消耗和大型动植物生长末期的低氮/磷比率（重量上占百分之3.;7）表明，有效的氮元素限制了植物的生长。
- His eloquence did not avail against the facts. 他的雄辩在事实面前不起什么作用。
- Joe tried to pull the heavy cart, but to no avail. 乔想拉那部笨重的大车，但是拉不动。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
