Excessive application of nitrogen and phosphorus fertilizers induces soil acidification and phosphorus enrichment during vegetable production in Yangtze River Delta, China

文献类型： 外文期刊

第一作者： Liang, L. Z.

作者： Liang, L. Z.;Zhao, X. Q.;Yi, X. Y.;Chen, Z. C.;Dong, X. Y.;Chen, R. F.;Shen, R. F.;Yi, X. Y.

作者机构：

关键词： Vegetable production;soil nutrients;nitrogen;acidification;phosphorus

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：2.95； 五年影响因子：3.109 ）

ISSN： 0266-0032

年卷期： 2013 年 29 卷 2 期

页码：

收录情况： SCI

摘要： Intensive vegetable cultivation has developed very rapidly in China, and investigation of current soil nutrient problems in vegetable fields and their potential environmental risk is important for local soil nutrient management strategies. Three hundred and sixty-six soil samples were collected from greenhouse vegetable fields, open vegetable fields and rice/wheat rotation fields in southern Jiangsu Province, the most intensive vegetable-producing areas in Yangtze River Delta, China, for the analysis of their soil fertility status. Soil acidification and P enrichment were the main problems identified in this area of vegetable production, with about 20 and 17% of the open and greenhouse vegetable field soils, respectively, being extremely acid with soil pH values below 5.0. In contrast, no soils under rice/wheat rotation fields were as acidic. Percentages of sites with Olsen-P concentrations <90mg/kg were 61, 85 and 0% for soils growing greenhouse vegetable, field vegetable and rice/wheat, respectively. The nitrogen (N) surplus for vegetable fields exceeded 170kg/ha/crop, and the phosphorus (P) surplus exceeded 40kg/ha/crop. Thus, current vegetable production leads to potential environmental risks of N and P pollution of nearby aquatic bodies. Insufficient supplementation with potassium fertilizers was found in some vegetable fields. Several ameliorative measures are proposed.

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