Effect of combined application of manure and chemical fertilizer on transportation and transformation of nitrogen and phosphorus in paddy field water
CUI Hu1,2, WANG Li-xia1, OU Yang1, YAN Bai-xing1, ZHAO Yu-jia3
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
Abstract：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.
崔虎, 王莉霞, 欧洋, 阎百兴, 赵瑜佳. 牛粪-化肥配施对水稻田氮磷迁移转化的影响[J]. 中国环境科学, 2018, 38(6): 2233-2242.
CUI Hu, WANG Li-xia, OU Yang, YAN Bai-xing, ZHAO Yu-jia. Effect of combined application of manure and chemical fertilizer on transportation and transformation of nitrogen and phosphorus in paddy field water. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2233-2242.
Emteryd O, Lu D Q, Nykvist N. Nitrate in soil profiles and nitrate pollution of drink water in the loss region of China[J]. Ambio, 1998,27(6):441-443.
[8]
Sun B, Zhang L X, Yang L Z, et al. Agricultural non-point source pollution in China:Causes and mitigation measures[J]. Ambio, 2012,41(4):370-379.
[9]
Ongley E D, Zhang X, Yu T. Current status of agricultural and rural non-point source pollution assessment in China[J]. Environmental Pollution, 2010,158(5):1159-1168.
Liang X Q, Zhu S R, Ye R Z, et al. Biological thresholds of nitrogen and phosphorus in a typical urban river system of the Yangtz delta, China. Environmental Pollution. 2014,192:251-258.
