铵的矿物固定和吸附是土壤氮素循环中的重要环节。
The fixation and adsorption of ammonium are important parts of nitrogen recycle in soils.
据此结论，该区域可在自然条件下恢复土壤氮素肥力。
Based on this conclusion, the paper deduced that it is possible to restore the nitrogen fertility under natural condition.
因此，秸秆施用是保持和提高土壤氮素营养的有效措施。
Therefore, straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.
上述研究表明，冻融交替对高寒草甸土壤氮素有显著影响。
The study showed that freezing and thawing alternation had a significant influence on soil nitrogen pool in the alpine meadow.
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 soil mineralized N at each tobacco growth stage was significantly higher in the control than in the N fertilization treatment.
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。
The priming effect of nitrogen fertilizer on soil nitrogen was studied by using waterlogged incubation method.
森林土壤氮素转化与循环在森林生态系统功能中占有极其重要的意义。
Nitrogen transformation and cycling in forest soils are of signification importance to the function of forest ecosystems.
在北京潮土上研究了冬小麦-夏玉米轮作体系下土壤氮素反硝化损失。
Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol.
用单因素指数模型模拟洱海流域农田土壤氮素矿化拟合度很高，效果较好。
By using one-pool model to simulate the mineralized process in soils in Erhai Lake basin, the effect was relatively good with a high goodness-of-fit.
文章研究了安徽省升金湖湿地土壤有机碳储存和分布特征及其与土壤氮素的关系。
The storage and profile distribution as well as the horizontal spatial variation of wetland soil organic carbon(SOC) in the Shengjin Lake Wetland were studied in this paper.
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。
Enough manure application could improve soil nitrogen content, but chemical fertilizer contributed less to soil nitrogen level.
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。
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.
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。
Most studies suggest that bacterial - and fungal-feeding nematodes stimulated soil nitrogen mineralization and promoted plant growth.
结果表明：淋洗有利于土壤氮素的矿化过程，但淋洗频率过快并没有造成土壤氮素矿化量的显著增加。
The results showed that: leaching was beneficial to soil mineralization, but the accumulation of the nitrogen mineralized in the soils would not be higher with increasing of the leaching fre...
高于湖南省以北地区土壤和本地区地带性土壤—红壤的固定态铵含量，是该地区的一项重要的土壤氮素资源。
The contents of fixed ammonium were higher than those in soil of North Hunan region and in soil of red earth region , and were a main N resource in the province.
坡地氮素淋溶是导致坡地土壤质量退化和农业非点源污染的重要原因之一。
Nitrogen leaching from a sloping land is one of the important causes of soil degradation and agricultural non-point source pollution.
两种效应共同决定了土壤矿质氮素的地表流失量。
These two distinct factors codetermined the total runoff loss of soil mineral nitrogen.
对稻田土壤施外源氮对氮素矿化的影响进行了研究。
The influence of applying nitrogen fertilizer to nitrogen mineralization was studied in paddy soil.
该肥与土壤充分混匀后，氮素溶释率相对降低，降低最大程度为11 3%。
When mixed fully with soil, relatively can lower the rate of nitrogen release. The lowered maximum degree is 11 3%.
采用盆栽试验和15n示踪技术对黑土添加玉米残体(秸秆和根茬)土壤植物系统中氮素转化进行了研究。
In this paper, a 15n tracer pot experiment was installed to study the effect of incorporating corn stalk and stubble into black soil on the nitrogen transformation in soil-plant ecosystem.
土壤中的氮素主要以有机氮的形式存在于土壤有机质中， 土壤碳氮比与有机质含量显著相关。
The N in the SOM existed mainly in the form of organic nitrogen, and the soil C:N was significantly correlated with SOM.
现有的材料说明，土壤年龄对土壤的氮素形态分布没有明显的影响。
SummaryResults available showed that soil age did no significant effect on the distribution of the forms of soil organic nitrogen.
沙质土壤中氮素的淋失量明显高于粘质土壤。
The amount of nitrogen leached from sand soil exceed in that from clay soil.
这可以从有机物质、氮素的循环和土壤肥力因素的改善得到证明。
This could be confirmed by the organic matter and nitrogen circulation and the improvement of soil fertility.
结果表明，该区域土壤有机质、全氮及各形态氮素含量呈现先降后升的趋势。
The result shows that the content of soil organic matter, total nitrogen and different forms nitrogen decreased firstly, then increased by time pasted.
在膜下滴灌条件下，进行了不同氮肥滴灌施肥方式和土壤盐度对棉花生长和氮素吸收影响的田间试验。
It is of great importance to study the growth and nitrogen(N) uptaking by cotton for optimizing soil salinity, irrigation and fertilization strategies with drip irrigation under film.
世界范围内，相当一部分玉米种植在十分瘠薄的土壤上，氮素缺乏成为玉米生产最重要的限制因子之一。
In the world wide, most of maize was planted in poor soil, and nitrogen is one of most important nutrition elements for maize growing, especially for maize yield.
下位叶比上位叶对土壤氮的供应状况更为敏感，随着施氮量的增加，水稻叶片氮素含量、叶绿素含量、SPAD值相应的增加，而下位叶的增幅更明显。
Leaf N/ chlorophyll content and SPAD value increased with the increasing N fertilizer, and the lower leaves were more sensitive to the soil N supply than the upper leaves.
在不同土壤条件下，水稻施用氮肥的增产效应、氮肥利用效率和对氮素的积累与分配均存在显著的基因型差异。
Under different soil conditions, there were significant genotypic differences in effects of applying nitrogen fertilizer on nitrogen use efficiency, yield and characters of nitrogen uptake.
在不同土壤条件下，水稻施用氮肥的增产效应、氮肥利用效率和对氮素的积累与分配均存在显著的基因型差异。
Under different soil conditions, there were significant genotypic differences in effects of applying nitrogen fertilizer on nitrogen use efficiency, yield and characters of nitrogen uptake.
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