应用生态学报2018，Vol.29Issue(1)：158-166,9.DOI:10.13287/j.1001-9332.201801.029
不同施肥措施对红壤稻田氮磷平衡及生态经济效益的影响
Effects of different fertilization regimes on nitrogen and phosphorus balance and eco-economic benefits in red paddy field
摘要
Abstract
The nitrogen (N) and phosphorus (P) balance was studied and the eco-economic benefits of N and P were evaluated for the paddy field in a red soil area,under the fertilization treatments of no fertilization (CK),chemical fertilizer (NPK),organic fertilizer (M),and chemical fertilizers combined with organic fertilizers (NPKM,NPM,NKM),based on the long-term experiment started in 1982,to optimize fertilizer application and reduce N and P losses.The results indicated that the slight N surplus (27.10 kg · hm-2) and P deficit (-6.85 kg · hm-2) were obtained in CK,while the N and P surplus respectively with 110.94-243.98 kg · hm-2 and 19.06-67.49 kg · hm-2 in other treatments were obtained.The treatments NPK and M had no effects on the N and P balance.Under the same fertilization rates,the N surplus in treatment NPKM was lower than that in treatments NPM and NKM by 6.3％ and 12.9％,while the P surplus was lower by 3.7％ and 13.8％,respectively.The total-N,total-P,alkali-hydrolyzable N,and available P contents in the 0-20 cm soil layer increased under the treatments of NPKM.Comparatively,the available P contents were relatively higher in the 20-40 cm soil layer under the treatments of high P application rates.Furthermore,the NPKM treatment had the highest eco-economic benefit value of 0.762,which indicated the optimized fertilizer application for the paddy fields in the red soil area.The treatment CK had the lowest eco-economic benefit values with 0.560.Based on the observations,the N and P (in P2O5) fertilization respectively at the rates of 157.71 kg · hm-2and 112.18 kg · hm-2 could well maintain the N and P balance for the paddy field in the red soil area.关键词
有机-无机肥配施/长期定位试验/氮磷平衡/生态经济效益Key words
chemical fertilizer combined with organic fertilizer application/long-term experiment/N and P balance/eco-economic benefit引用本文复制引用
洪曦,高菊生,罗尊长,曾希柏,白玲玉,罗志勇,易平,陈淑平..不同施肥措施对红壤稻田氮磷平衡及生态经济效益的影响[J].应用生态学报,2018,29(1):158-166,9.基金项目
本文由国家科技计划项目(2016YFD0300902,2015BAD23B03)资助 This work was supported by the National Science & Technology Program of China (2016YFD0300902,2015BAD23B03). （2016YFD0300902,2015BAD23B03）
