Great part of soil nitrogen is organic forms.
土壤有机氮的分解矿化是可矿化氮的根本来源。
Nitrogen mineralization is one of the most important aspects in soil nitrogen circulation.
氮的矿化是土壤氮循环中的重要环节之一。
The priming effect of nitrogen fertilizer on soil nitrogen was studied by using waterlogged incubation method.
应用淹水培养方法 ，研究了铵态氮肥对土壤氮素的激发效应。
Therefore, straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.
因此，秸秆施用是保持和提高土壤氮素营养的有效措施。
The SAPs have some form of influence on soil urease activity, which correlates with soil nitrogen transformation.
此外，保水剂对土壤脲酶活性有一定影响，其变化与氮素转化有关；
The study showed that freezing and thawing alternation had a significant influence on soil nitrogen pool in the alpine meadow.
上述研究表明，冻融交替对高寒草甸土壤氮素有显著影响。
Enough manure application could improve soil nitrogen content, but chemical fertilizer contributed less to soil nitrogen level.
有机肥施用达到一定量后可以提高土壤中氮素含量，而化肥对于土壤氮素提高不明显。
The process of soil nitrogen loss in runoff and sediment is restricted by interaction of soil nutrient with rainfall and runoff.
坡地土壤养分流失过程实际上是表层土壤养分与降雨、径流相互作用的过程，土壤养分流失的多少主要受相互作用的限制。
Soil grain composition, soil carbon and soil nitrogen were identified as the most important factors in shaping nematode communities.
土壤颗粒组成、碳含量和氮含量是影响线虫群落结构的主要环境因子。
Most studies suggest that bacterial - and fungal-feeding nematodes stimulated soil nitrogen mineralization and promoted plant growth.
大量研究发现，食细菌线虫和食真菌线虫都有助于土壤氮素等养分矿化，从而促进植物生长。
The soil nitrogen status is a function of the processes of nitrogen fixation, microbial decompostion, nitrificattion and denitrification.
土壤氮状况是一个固氮、微生物分解、硝酸化和脱氮过程的作用。
Dynamics of different soil nitrogen pools after application of urea with DCD or organic materials were studied by aerial incubation method.
采用好气土壤培养试验，研究了尿素配施有机物料和DCD条件下土壤不同氮库的动态。
When the simulation model combined with GIS, it was easy to evaluate regional soil nitrogen behaviors under different treatments of water and nitrogen.
结果表明，通过模型计算与地理信息系统相结合，便于评价不同水氮管理、不同降雨年型条件下区域农田土壤水、氮素行为。
The dynamics of various soil nitrogen pool after nitrogen fertilizer application at wheat seedling stage was studied by pot experiment and 15n trace technique.
应用盆栽试验和15n标记技术研究了小麦苗期施入N肥后土壤不同N库的动态。
The above results show that, the effect of alternative freezing and thawing has a great influence on the soil organic matter, soil nitrogen, soil potassium and some soil enzymes.
上述研究结果说明，冻融交替作用对黑土土壤有机质、氮钾和酶活性产生重要影响。
Nitrogen concentration in mature leaves(N_g)and nitrogen concentration in senescing leaves(N_s)increased with increasing soil(organic) matter, total soil nitrogen and soil moisture.
植物叶片N素含量与土壤有机质、土壤N素含量和土壤含水量呈显著正相关；
Mineralization of nitrogen from various sources can contribute significantly to soil nitrogen balance, to total plant nitrogen availability, and to environmental quality and global change.
土壤氮素矿化研究对从农田生态系统氮素平衡到全球变化和环境问题均具有重要意义。
This paper studies the distribution characteristic of soil nitrogen and phosphorus in the new-born wetland of the Yellow river estuary, and carries on the preliminary environmental impact assessment.
研究了黄河口新生湿地土壤中氮磷的分布特征，并进行了初步环境效应评价。
The faeces contain nitrogen which fertilizes the soil.
排泄物含有肥沃土壤的氮。
The poor soil of bogs, for example, offers little nitrogen and phosphorus, so carnivorous plants enjoy an advantage over plants that obtain these nutrients by more conventional means.
例如，沼泽贫瘠的土壤提供的氮和磷很少，所以肉食植物比那些通过更传统的方式获得这些营养的植物更有优势。
We look at soil chemistry—for example, how much nitrogen or magnesium there is in the soil in one spot—and we compare it with the chemistry of the soil a short distance away.
我们会观察土壤的化学性质——比如某个地方的土壤里有多少氮或者镁——然后与附近土壤的化学性质作比较。
Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions.
即使是元素状态为气体的氮，也通常作为硝酸根离子从土壤中被吸收。
Horse waste is rich in phosphorus and also nitrogen compared to normal soil.
和普通土壤相比，马粪更富含磷和氮。
These microbes enable the soil to have more nitrogen, which plants need to live and they remain quite active during the winter.
这些微生物可以让土壤中植物生长所需的氮含量增加，在冬天让植物仍保持活跃。
Agriculture produces more greenhouse gases than all methods of transport put together, and contributes to a host of other problems, from nitrogen pollution to soil erosion.
农业产生的温室气体比交通运输所有方式加起来还要多，并且还进一步促成了从氮污染到水土流失等许多其它问题。
The soil in the boxes contained normal nitrogen.
盒中的土壤包含了正常含量的氮。
Used coffee grounds, in moderation, can do wonders for the garden by adding nitrogen to the soil.
用过的咖啡渣，通过适量地在土壤中加入氮来对花园产生好的作用。
Believe it or not, nettles are fussy about where they grow - in fact, they need a soil rich in phosphates and nitrogen to really thrive.
信不信由你，荨麻对它们生长的土壤很挑剔。事实上，它们的繁荣生长需要富含磷酸盐和氮的土壤。
Believe it or not, nettles are fussy about where they grow - in fact, they need a soil rich in phosphates and nitrogen to really thrive.
信不信由你，荨麻对它们生长的土壤很挑剔。事实上，它们的繁荣生长需要富含磷酸盐和氮的土壤。
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