Effect of combined application of manure and chemical fertilizer on transportation and transformation of nitrogen and phosphorus in paddy field water.

被引：0

作者：

Cui, Hu ^{[1
,2
]}

Wang, Li-Xia ^{[1
]}

Ou, Yang ^{[1
]}

Yan, Bai-Xing ^{[1
]}

Zhao, Yu-Jia ^{[3
]}

机构：

[1] Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun,130102, China

[2] University of Chinese Academy of Sciences, Beijing,101408, China

[3] .Changchun Normal University, Changchun,130031, China

来源：

Zhongguo Huanjing Kexue/China Environmental Science | 2018年 / 38卷 / 06期

关键词：

Reaction kinetics - Nitrogen - Manures - Fertilizers - Phosphorus;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The manure (cattle dung) was applied instead of chemical fertilizer partially( the amount of manure: 5t/hm2, 10t/hm2 and 20t/hm2) to study the environmental behavior of nitrogen and phosphorus in the paddy field during the growth period. The results showed the optimum periods for controlling NH4+-N, NO3--N, total nitrogen (TN) and total phosphorus (TP) in paddy field were 5, 30, 7 and 20 days after fertilization. The changing in TN and TP concentrations with time were fit the first order reaction kinetic function(0.7444≤R2≤0.9724; 1.81×106≤F≤0.0055). Cow dung partly replacing the inorganic fertilizer fertilization can reduce TN and TP output load by 36.0%~64.3% and 20.3%~48.9%) in the rice field water. The application of cow dung reduced the N/P in paddy field water, thus reducing the risk of water eutrophication. At the same time, the application of cow dung increased the contents of urease and phosphatase in the soil, which promoted the transformation of N and P into plant bioavailable forms. The best economical addition dose estimated was 10t/hm2 for manure. The annual output loads of nitrogen and phosphorus was 17.70kg/hm2 and 1.26kg/hm2, respectively. © 2018, Editorial Board of China Environmental Science. All right reserved.

引用

页码：2233 / 2242