牛粪-化肥配施对水稻田氮磷迁移转化的影响

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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.

Key words： cattle dung paddy field water output nitrogen/phosphorus comprehensive benefit

Received: 03 November 2017

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Corresponding Authors: 王莉霞,副研究员,lxwang@iga.ac.cn E-mail: lxwang@iga.ac.cn

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	Articles by authors
	CUI Hu
	WANG Li-xia
	OU Yang
	YAN Bai-xing
	ZHAO Yu-jia

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CUI Hu,WANG Li-xia,OU Yang等. Effect of combined application of manure and chemical fertilizer on transportation and transformation of nitrogen and phosphorus in paddy field water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2233-2242.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2233

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