南京农业大学学报2018，Vol.41Issue(1)：105-112,8.DOI:10.7685/jnau.201702032
不同水肥模式下设施辣椒与土壤中氮和磷分布及其环境与经济效益
The distribution of nitrogen,phosphorus in soil and greenhouse pepper and the environment and economic benefits under different fertilization model
摘要
Abstract
[Objectives]The best fertilization model was filtrated in order to provide a reference for pepper cultivation.[Methods]The environment and economic benefits and the distribution of nitrogen(N),phosphorus(P)in soil and pepper of several treatments (Treatment 1:conventional fertilization;Treatment 2:optimization of reducing herbicide;Treatment 3:optimization of reducing pesti-cide;Treatment 4:integration of water and fertilizer)were compared in order to filtrate a better fertilization model. [Results]N,P decreased layer by layer in different depth of soil,with the times of fertilization,and the accumulation of N and P in different depth of soil increased,the downward leaching of which was not obvious. In the growth of pepper,the growing rate of accumulation of N,P in pepper in the fourth treatment was higher than that in the other three treatments. The total nitrogen(TN),total phosphorus(TP) contents in pepper were significantly higher than those in the other three treatments in harvest time,which promoted the absorption and utilization of nitrogen and phosphorus. The yield of the fourth treatment was 79.37%,41.25%,16.49% significantly higher than that of the other three treatments,respectively. The partial factor productivity of applied N(PFPN)of the fourth treatment was 135.33%,85.33%,52.84% significantly higher than that of the other three treatments,respectively. The input-output ratio(VCR)of the fourth treatment was 3.23 produced the best economic benefit,which was 28.17%,31.30%,16.61% significantly higher than that of the other three treatments,respectively. The emission flux CO2,N2O of first treatment and the second treatment were higher than those of the other treatments. There were environmental risks about greenhouse effect under the conventional fertilization,which was to be confirmed further. [Conclusions]The results above suggest that the fourth treatment(integration of water and fertilizer)brings better environment and economic benefits among these treatments.关键词
水肥模式/辣椒/氮/磷/氮肥偏生产力/环境与经济效益Key words
fertilization model/pepper/nitrogen/phosphorus/PFPN/environment and economic benefits分类
农业科技引用本文复制引用
李杏,李仁杰,汤婕,戴曹培,李学德..不同水肥模式下设施辣椒与土壤中氮和磷分布及其环境与经济效益[J].南京农业大学学报,2018,41(1):105-112,8.基金项目
国家水体污染控制与治理科技重大专项(2015ZX07103-007) （2015ZX07103-007）
