摘要
A long-term experiment was set up in Yingtan of Jiangxi Province to investigate the effects of long-term application of inorganic fertilizers on the biochemical properties of a rice-planting soil derived from Quaternary red earth. Noncultivated soils are extremely eroded and characterized by a low pH and deficiencies in available nutrients, in particular P and N. After 13 years of inorganic fertilization in cultivation for double-cropped rice, the biochemical properties of the soil were changed. The nitrification potential and urease activity were higher in the treatments with N application than those without N application, Acid phosphatase activity and dehydrogenase activity were also higher in the treatments with P application than in those without P application. The dehydrogenase activity correlated well with the concentrations of both total P and hydrolysable N and with rice crop yield, suggesting that dehydrogenase activity might be a suitable indicator for improvement in soil fertility.
一个长期的实验在江西省的 Yingtan 被建立在从第四级的红壤导出的种大米的土壤的生物化学的性质上调查无机肥料的长期的申请的效果。Noncultivated 土壤被低 pH 和缺乏极其在可得到的营养素,特别地 P 和 N 侵蚀并且描绘。在 13 年在为双 cropped 大米的耕作的无机的授精以后,土壤的生物化学的性质被改变。没有 N 申请,氮的硝化作用潜力和脲酶活动比那些在有 N 申请的处理是更高的。没有 P 申请,酸性磷酸酶活动和脱氢酶活动比在那些在有 P 申请的处理也是更高的。脱氢酶活动与全部的 P 和 hydrolysable N 的集中并且与米饭庄稼产量相关很好,建议那项脱氢酶活动可能是为在土壤肥力的改进的合适的指示物。
基金
the National Natural Science Foundation of China (No.40471065)
the Open Fund of the State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences (No.055122).