Change in soil available phosphorus in relation to the phosphorus budget in China

被引:99
作者
Cao, Ning [2 ]
Chen, Xinping [1 ]
Cui, Zhenling [1 ]
Zhang, Fusuo [1 ]
机构
[1] China Agr Univ, Ctr Resources Environm & Food Secur, Beijing 100193, Peoples R China
[2] Jilin Univ, Coll Plant Sci, Changchun 130062, Peoples R China
关键词
Change in available P; Long-term field trials; P budget; P build-up; CROP YIELDS; DYNAMICS; FERTILIZER; BALANCE; POOLS; MODEL;
D O I
10.1007/s10705-012-9530-0
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Limited information on soil available phosphorous (P) status has restricted rational P-management strategies, which are necessary to develop, budget, and control P fertilizer inputs. This study was conducted to quantify the relationship between the P budget (P input minus output) and soil available P content (Olsen-P) and its variation from seven long-term experiments that covered subtropical and temperate zones with seven crop systems and six soil types. Across all years and experiments, soil available P content increased linearly with increasing P budget (P < 0.01), and the increase in soil available P content in the 0-20 cm topsoil layer by each 100 kg P budget was 1.44-5.74 mg kg(-1) for the seven sites. This large variation can be explained by the different environments, crop systems, and soil physico-chemical properties. These results will help to predict long-term changes in soil available P using the annual P budget and provide useful information for proper management of P fertilizer.
引用
收藏
页码:161 / 170
页数:10
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