文献类型： 外文期刊

作者： Guo, H. C. ² ; Zhang, Q. C. ³ ; Wang, G. H. ³ ; Chien, S. H. ¹ ;

作者机构： 1.Int Fertilizer Dev Ctr, Muscle Shoals, AL 35662 USA

2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Danzhou, Peoples R China

3.Zhejiang Univ, Coll Environm & Resources Sci, Dept Resources Sci, Hangzhou, Zhejiang, Peoples R China

关键词： phosphorus: 7723-14-0;sodium hydroxide: 1310-73-2;hydrochloric acid: 7647-01-0;sodium bicarbonate: 144-55-8;phosphate rock: agrichemical;fertilizer;monocalcium phosphate: 7758-23-8;agrichemical;fertilizer;inorganic resin

期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）

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收录情况： SCI

摘要： A pot experiment was conducted in two acidic soils (pH 4.8) with similar properties except for phosphorus (P) status to investigate the influence of different P fertilizers [Kunyang phosphate rock (KPR), monocalcium phosphate (MCP)] on ryegrass growth and different soil P fractions in the two soils. The P treatments were KPR at 50, 100, and 250 mg P kg-1 and MCP at 50 mg P kg-1. Results showed that the application of P fertilizers produced significant increase of ryegrass growth compared with no P application on soil with low P status. Dry weight of ryegrass did not increase after P application, compared with no P application on soil with high P status. Through P fractionation as modified method of Hedley, Stewart, and Chauhan (1982), inorganic resin P, sodium bicarbonate (NaHCO3) P, and sodium hydroxide (NaOH) P increased after MCP treatment compared with no P application. The PR application only increased resin P and hydrochloric acid (HCl) P. Soil organic P fractions were stable and less affected by P application. The average of KPR P dissolved in the two soils across all P rates was low: only about 19% of the averaged amount of KPR P applied, which was due to its low reactivity. This explains the poor agronomic effectiveness of KPR with respect to MCP.