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 research was carried out to understand effect of application of rye straw on transformation of inorganic nitrogen in soil, and on N2O and CO2 emissions.
本研究通过培养试验探讨了添加黑麦秸秆对土壤中无机氮的形态转化和N_2O、CO_2释放的影响。
B ase on the study of lab experiment, the characteristics of nitrogen and phosphorus transport and transformation in soil was studied under sprinkler irrigation and flood irrigation.
本文以室内土柱实验研究为基础，研究了漫灌、喷灌入渗条件下，土壤氮类、磷类化合物迁移转化的特征。
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.
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。
Urea, as a kind of nitrogen fertilizer, used widely for agriculture production, which transformation process in soil is significantly for nitrogen efficiency.
尿素作为农业生产中广泛应用的氮肥，研究其在土壤中的转化过程具有重要的意义。
Isotope dilution analysis is a valid approach for studying nitrogen transformation characteristics in soil-plant systems.
同位素稀释分析是研究氮素在土壤植物体系中转化和迁移特征的有效方法。
The effect of different nitrogen fertilizers on dynamic transformation of phosphorus fertilizer in paddy soil under flooding condition was studied in indoor incubation experiments.
利用室内土培试验研究了淹水条件下不同氮肥对水稻土（黄泥土）中磷肥转化的动态影响。
The infiltration, transportation and transformation of a main contaminant (ammonia nitrogen) in the Taihu Lake sediment through a clayey soil layer are studied experimentally.
对太湖疏浚污染底泥中含有的一种主要污染物——氨氮在底泥堆场黏土防渗层中的渗透和运移规律进行了试验研究。
With the help of laboratory and thermodynamic simulation, the relation of nitrogen transformation with calcium and magnesium variation during wastewater infiltration in soil water system is studied.
结果表明：在连续入渗条件下，阳离子交换作用是控制地下水硬度升高的主要过程；
With the help of laboratory and thermodynamic simulation, the relation of nitrogen transformation with calcium and magnesium variation during wastewater infiltration in soil water system is studied.
结果表明：在连续入渗条件下，阳离子交换作用是控制地下水硬度升高的主要过程；
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