Responses of Greenhouse Tomato and Pepper Yields and Nitrogen Dynamics to Applied Compound Fertilizers

查看全文 作　　者：ZHUJian-[1]Hua;LIXiao-[1]Lin;ZHANGFu-[1]Suo;LIJun-[2]Liang;[1]P,CHRISTIE;[3]P.CHRISTIE

机构地区：[1]KeyLaboratoryofPlant-SoilInteractions,MinistryofEducation.ChinaAgriculturalUniversity,Beijing100094(China)/E-mail:zhucool@caf.ac.cn;[2]DepartmentofAgronomy,LaiyangAgriculturalCollege,Shandong265200(china);[3]AgriculturalandEnuironmentalSciencsDepartment,Queen'sUniversityBelfast,NewforgeLane,BelfastBT95PX(UX)

出　　处：《Pedosphere》索引2004年第14卷第2期,共10页

基　　金：Project supported by the National Natural Science Foundation of China (No. 30230250) and the Royal Society of London (No. 15360). 摘　　要：Yield and N uptake of tomato (Lycopersicum esculentum Mill.) and pepper (Capsicum annuum L.) crops in five successive rotations receiving two compound fertilizers (12-12-17 and 21-8-11 N-P2O5-K2O) were studied to determine 1)crop responses,2) dynamics of NO3-N and NH4-N in different soil layers,3) N balance and 4) system-level N efficiencies.Five treatments (2 fertilizers,2 fertilizer rates and a control),each with three replicates,were arranged in the study.The higher N fertilizer rate,300 kg N ha-1 (versus 150 kg N ha-i),returned higher vegetable fruit yields and total aboveground N uptake with the largest crop responses occurring for the low-N fertilizer (12-12-17) applied at 300 kg N ha-1 rather than with the high-N fertilizer (21-8-11). Ammonium-N in the top 90 cm of the soil profile declined during the experiment,while nitrate-N remained at a similar level throughout the experiment with the lower rate of fertilizer N.At the higher rate of N fertilizer there was a continuous NO3-N accumulation of over 800 kg N ha-1. About 200 kg N ha-1 was applied with irrigation to each crop using NO3-contaminated groundwater. In general,about 50% of the total N input was recovered from all treatments. Pepper,relative to tomato,used N more efficiently with smaller N losses,but the crops utilized less than 29% of the fertilizer N over the two and a half-year period. Local agricultural practices maintained high residual soil nutrient status. Thus,optimization of irrigation is required to minimize nitrate leaching and maximize crop N recovery. 关键词：西红柿温室种植胡椒氮复合肥

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Responses of Greenhouse Tomato and Pepper Yields and Nitrogen Dynamics to Applied Compound Fertilizers

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耦合文献(164)

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