土壤氮素含量,Soil nitrogen content
1)Soil nitrogen content土壤氮素含量
英文短句/例句
1.Characteristics of Nitrogen Content of Rhizosphere and Xerophilous Shrubs旱生灌木根际及灌丛土壤氮素含量特征研究
2.Distribution and Relationship of Nitrogen Content in Flue-cured Tobacco Leaf and Soil in Sanmenxia Tobacco Districts三门峡烟区烤烟总氮与土壤氮素含量的分布特点及关系分析
3.Contents of Active Organic Carbon, Nitrogen and Its Relationship with Nitrogen Mineralization of Soil on the Loess Plateau;黄土区几种土壤中活性有机碳、氮含量及其与土壤氮素矿化的关系
4.Contents and Changes of Soluble Organic Nitrogen in the Different Soils;土壤中可溶性有机氮含量及影响因素研究
5.Contents and Changes of Soil Microbial Biomass Carbon and Nitrogen in the Different Soils on the Loess Plateau;黄土区不同土壤微生物量碳、氮的含量及其影响因素
6.Prediction of soil nitrogen supply and maize yields with the relative chlorophyll contents of leaves under different climates and soil conditions不同气候和土壤条件下玉米叶片叶绿素相对含量对土壤氮素供应和玉米产量的预测
7.Characteristics of nitrogen content between rhizosphere and bulk soil under seven shrubs in arid desert area of China干旱荒漠区不同灌木根际与非根际土壤氮素的含量特征
8.given nitrogen rich organic matter in soil在土壤中施含氮量高的有机质
9.Maize straw returning to the field can increase the soil total nitrogen and inorganic nitrogen content.秸秆还田增加了土壤全氮和无机氮含量。
10.water content of soil土壤含水量（土壤含水率）
11.Effects of irrigation amount and stage on nitrogen accumulation,distribution,translocation and soil NO_3~--N content in high-yield wheat灌水量和时期对高产小麦氮素积累、分配和转运及土壤硝态氮含量的影响
12.Relationship between Microbial Biomass Nitrogen and Nitrogen Utilization of Maize土壤微生物量氮与玉米氮素养分利用关系研究
13.Soil Nitrogen Content and Enzyme Activity in Different Utilization Types of Land in the Upper Reaches of Lancang River澜沧江上游不同土地利用类型土壤氮含量与土壤酶活性研究
14.soil quality - determination of total nitrogen - modified method土壤质量-总含氮量的测定法-修改的hjeldahl法
15.Influence of Glutin on the Number of Microbial Population and Mineral Nitrogen Content in Soil明胶对土壤微生物数量及矿质氮含量的影响
16.Effect of Different Nitrogen Fertilization Rate and Irrigation Rate on Nitrate Nitrogen Concentration in Wheat-Maize Interplanting System施氮量和灌溉量对小麦/玉米间作土壤硝态氮含量的影响
17.Effects of Different Nitrogen Fertilization Levels on Yield of Cucumber,the Soil Nitrate-N Accumulation and the Soil Solution Nitrate-N Concentrations不同氮肥水平对黄瓜产量、土壤硝态氮累积及土壤水溶液硝态氮含量的影响
18.Soil drought reduced moisture content and nitrogenase activity of nodules.土壤干旱降低田菁根瘤的含水量和固氮活性。
相关短句/例句
the soil N content土壤含氮量
1.The relationship among rainfall,the soil N content in the watershed and N pollutant load at the exit of the watershed was analyzed by mathematic model in the paper,using the soil N moving law in order to reveal the mechanism how N pollution works.然后以管河流域为例,分析得出以下2条规律:在汛期随着流域土壤含氮量的增加,流域出口氮污染负荷增加;随着降雨量增加,流域出口氮污染负荷也增加。
3)soil nitrogen content土壤氮含量
1.A pot experiment was conducted to study the effects of different thiourea on the growth, content of photosynthetic pigments and nitrate accumulation of the spinach andsoil nitrogen content.采用盆栽法,研究了硫脲不同用量(0%、1%、3%、5%、7%)对菠菜生长、叶绿体色素含量、硝酸盐累积及土壤氮含量的影响。
2.Rich nutrients were accumulated in Alnus nepalensis forest land,and the soil ecological environment were good,namelysoil nitrogen content and enzyme activity were greater than other land utilization types;(2) Under all kinds of land utilization types,the higher is thesoil nitrogen content,the greater is the enzyme activity.通过对地处澜沧江上游滇西北山区大理洱源县炼铁乡的6种不同土地利用类型土壤氮含量与土壤酶活性变化进行分析,探讨他们的变化及其相互关系,为退化山地土壤的恢复与可持续利用提供理论依据。
4)soil NO-3-N content土壤硝态氮含量
1.The effects of irrigation amount on grain quality,yield andsoil NO-3-N content were studied with strong gluten wheat "Jimai 20" and middle gluten wheat "Taishan 23" by setting four irrigation amount treatments(with 0 mm,180 mm,240 mm,300 mm irrigation amount respectively) under field condition.选用强筋小麦济麦20和中筋小麦泰山23两个品种,在大田条件下设置不灌水(0 mm)、灌水180 mm,240mm和300 mm 4个处理,研究了灌水量对籽粒品质和产量及土壤硝态氮含量的影响。
5)Soil total N content土壤总氮含量
6)soil C and N content土壤碳氮含量
1.In order to explore management approach for sustainable development of soil quality, we study the effect of land degradation onsoil C and N content, examine the relative influence of various rehabilitation practices (three seeding treatment and a non-seeded natural recovery treatment) onsoil C and N content in early secondary succession.针对我国青藏高原草地大面积退化及由此引发的一系列生态环境问题,从土壤生态功能恢复和区域可持续发展的角度出发,将原生高寒嵩草草甸封育系统作为对照,研究了土地退化对土壤碳氮含量的影响,检验了不同人工重建措施(3个人工种植处理:混播、松耙单播、翻耕单播和1个自然恢复处理)对土壤碳含量的相对影响程度。
延伸阅读
土壤氮素的供应能力土壤氮素的供应能力nitrogen supplying capacity of soil土壤氮素的供应能力(ni，rogen supplyingeapaeity of 5011)土壤对作物(以一季计)供应氮素的数量和动态过程。土峨供氮圣土壤对作物所供应的氮的总量。决定于土壤起始速效氮量，以及在作物整个生长过程中土坡氮素的释放量。土壤起始速效氮t种植时根系活动层土坡中硝酸态氮和交换性铰态氮的积累量，与前季作物的氮肥和有机肥的施用量等有密切的关系.在正常施肥的情况下，土壤的起始速效氮量是很低的。土壤氮景的释放t系指作物生长期间土壤有机态氮的矿化量和粘土矿物固定态按的释放量。由于土壤“固有的”粘土矿物固定态按的有效性一般很低，因此作物生长期间土壤氮素的释放量主要决定于在此期间土城有机态氮的矿化量.矿化量的多少又决定于土壤有机态氮的含量和生物分解性的大小，以及作物的生长期的长短和在此期间土壤的水热状况。因此，同一土壤对不同作物的供氮量，主要决定于该作物生长期的长短，以及生长期间的气温和降水(或灌溉)等状况.土峨供氮1的黄度在实际侧定时，一般是从田间试验中无氮区(不施氮肥和有机肥)作物在成熟时地上部分累积的氮t中，扣除种子或秧苗带入的氮l后计得的。但这种计算方法将一些非土壤来源的氮量也作为土壤供氮量看待了，因而测得的结果将不同程度的高于土坡的实际供氮量。这些非土壤来源的氮包括:在作物(不包括豆科作物)生长期间进行的自生固氮作用提供的氮量，降水和灌溉水带入的氮量等。但是，另一方面，由于未计入根中的氮量而使测得的结果又低于实际的供氮量.对中国的统计结果表明，土壤对水稻、小麦和大麦等作物的供氮量一般为50~100千克/公顷。对中国太湖地区水稻土供氮能力的研究表明，同一土壤对生长期长的单季晚稻的供氮量多于生长期短的双季早稻或双季晚稻.对于冬小麦，其生长期虽然很长，但因在此期间的气温较低，土壤的供氮量并不多.土峨旅素供应动态过程是作物(以一季计)生长过程中，土壤对作物供应的氮量随时间的变化过程。当土坡中起始速效氮量很少时，土城的供氮过程主要决定于在此期间土坡有机态氮的矿化过程。对同一土城来说，它主要决定于土坡水热状况的变化。 (蔡贵信朱岁乞良)
