Results showed that DMPP can reduce soil nitrate leaching significantly.
结果表明，DMPP能够显著减少土壤硝酸盐的淋失。
Soil nitrate leaching not only causes the loss of fertilizer, but also brings about serious environmental problems.
土壤硝态氮的淋失不但造成肥料的损失，而且产生严重的环境问题。
Under a certain water and nitrate treatments, soil nitrate in open-land vegetable field would move down below 180cm soil.
一定水氮供应条件下，露地生产蔬菜地土壤硝态氮有可能淋洗到1.8米土体以下。
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。
Advances in studies on accumulation and leaching of nitrate in farming soil.
农田土壤硝酸盐积累与淋失研究进展。
Results demonstrated that nitrate had obvious spatial variation and randomicity in lateral direction and vertical direction of soil profile.
结果表明硝酸盐在水平方向和垂直方向具有明显的空间变异。
Reducing N and P rates also decreased N and P accumulation and nitrate content in the soil and decreased the risk of N and P running off.
减少氮磷化肥用量可以大幅度降低氮磷在土壤中的累积和硝酸盐的含量，减少氮磷的流失风险。
The application of wastewater sludge did not affect the nitrate reductase activity but BSW significantly increased the content of nitrate in the rhizosphere soil.
应用废水污泥不会影响硝化还原酶活性，但是BSW在根际土壤明显增加硝酸盐的含量。
The effect of alternative freezing and thawing can enhances the activities of some soil enzymes greatly, such as phosphatase, nitrate reductase and nitrite reductase.
冻融交替作用明显地增强土壤中磷酸酶、硝酸还原酶和亚硝酸还原酶的活性。
This paper reports the effect of DCD in seedling stage to soil microorganism of bacteria, mold and actinomycetes, and the concentration changes of both ammonium nitrogen and nitrate nitrogen in soil.
实验研究了双氰胺在玉米苗期对土壤微生物细菌、霉菌和放线菌的影响，及对土壤中铵态氮和硝态氮贮量变化的影响。
An ion chromatography method with suppression-conductivity detection has been developed for the detection of residuary chlorate in the soil after explosion with a high concentration of nitrate.
本文建立了离子色谱-抑制电导检测测定含有高浓度硝酸根的爆炸尘土中残留氯酸根的方法。
Applying more nitrogen would increase the content of soil microbial biomass nitrogen, but might result in large amount of nitrate residue in soil and suspected to leaching loss.
继续增加施氮量，土壤微生物量氮含量增加，但土壤中残留大量硝态氮，易淋溶损失。
According to soil fertility and soil structure in the loess plateau, the experiment of fertilizer amount was carried out with ammonium nitrate and calcium superphosphate.
根据黄土丘陵区土壤肥力特点及土体结构，选用硝酸铵和过磷酸钙作为试验肥料，进行了不同施肥量试验。
The concentration of nitrate-N increased continuously in soil surface, which resulted in nitrate leaching to groundwater after rewetting.
土表的硝态氮浓度不断增加，烤田增大了复水后硝态氮向地下水淋溶的趋势。
With the same irrigation amount, the increasing of nitrate nitrogen content both in the soil and groundwater has the polynomial correlation with groundwater table.
灌水量相同时，土壤中硝态氮增加量和地下水中硝态氮的增量与地下水埋深成多项式关系。
The vertical transport of nitrate-N was also affected by the soil bulk density and the organic matter content.
土壤容重和有机质含量对硝态氮的垂直运移有很大的影响；
Application of N fertilizer significantly increased the amount of residual nitrate-N, and affected its distribution in the soil profile.
施用氮肥可明显增加土壤硝态氮残留数量，并影响其剖面分布；
Although using chemical fertilizer was a necessary measure to increase crop yields, it could cause a large number of nitrate zone of invalid accumulation in the soil.
尽管施用化学氮肥是提高作物产量的必要措施，但长期大量施用能引起硝态氮在根区以下土层的无效累积。
The effects of six organic manures on nitrate content and nutrient quality of foliage vegetables (celery and romaine lettuce) were studied in soil-less culture.
采用基质栽培试验研究了不同有机肥种类对叶类蔬菜（芹菜和生菜）硝酸盐和营养品质的效应。
An experiment in field and artificial penetration-filter pond test both were conducted to show factors affecting content of nitrate-nitrogen in soil in the present study.
采用田间试验及人工渗滤池试验方法，研究了土壤中硝态氮含量的影响因素。
The relationship between nitrate fertilizer application and cultivated conditions such as soil fertility, preceding crop, plant density and irrigation etc.
本文对马铃薯经济施肥量与土壤、前作、密度、灌溉等栽培条件的关系进行了定量研究。
Effects of applying different nitrogen fertilizer on yield, quality and nitrate leaching in soil layer were studied during the cucumber growth period in greenhouse.
不同施氮措施条件下，对保护地黄瓜生育期内氮素吸收利用效率、氮素淋洗损失进行了研究，同时也研究了不同处理对黄瓜产量及品质的影响。
It is concluded that the HYDRUS-2D software can be used to implement water and nitrate transport in soil under drip fertigation.
因此，HYDRUS - 2d软件可以作为预测滴灌施肥灌溉条件下水分和氮素在土壤中运移的有效工具。
It is concluded that the HYDRUS-2D software can be used to implement water and nitrate transport in soil under drip fertigation.
因此，HYDRUS - 2d软件可以作为预测滴灌施肥灌溉条件下水分和氮素在土壤中运移的有效工具。
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