Response of Tomato on Calcareous Soils to Different Seedbed Phosphorus Application Rates

查看全文 作　　者：ZHANG Xiao-[1]Sheng;LIAO [2]Hong;CHEN [1]Qing;P. [1,3]CHRISTIE;LI Xiao-[1]Lin;ZHANG Fu-[1]Suo

机构地区：[1]College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094 (China);[2]Soil and Fertilizer Extension Center, Beijing Agricultural Bureau, Beijing 100026 (China);[3]Agricultural and Environmental Science Department, The Queen's University of Belfast, Belfast BT9 5PX (UK)

出　　处：《Pedosphere》索引2007年第17卷第1期,共7页

基　　金：Project supported by the National Natural Science Foundation of China (No. 30230250); the Ministry of Agriculture, China (No. 2003-Z53). 摘　　要：Field experiments were conducted with five rates (0, 75, 150, 225, and 450 kg P2O5 ha-1) of seedbed P fertilizer application to investigate the yield of tomato in response to fertilizer P rate on calcareous soils with widely different levels of Olsen P (13-142 mg kg-1) at 15 sites in some suburban counties of Beijing in 1999. Under the condition of no P fertilizer application, tomato yield generally increased with an increase in soil test P levels, and the agronomic level for soil testing P measured with Olsen method was 50 or 82 mg kg-1 soil to achieve 85% or 95% of maximum tomato yield, respectively. With regard to marketable yield, in the fields where Olsen-P levels were < 50 mg kg-1, noticeable responses to applied P were observed. On the basis of a linear plateau regression, the optimum seedbed P application rate in the P-insufficient fields was 125 kg P2O5 ha-1 or about 1.5-2 times the P removal from harvested tomato plants. In contrast, in fields with moderate (50 < Olsen P < 90 mg kg-1) or high (Olsen P > 90 mg kg-1) available P, there was no marked effect on tomato fruit yield. Field survey data indicated that in most fields with conventional P management, a P surplus typically occurred. Thus, once the soil test P level reached the optimum for crop yield, it was recommended that P fertilizer application be restricted or eliminated to minimize negative environmental effects. 关键词：番茄石灰质土壤种植

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Response of Tomato on Calcareous Soils to Different Seedbed Phosphorus Application Rates

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