淮北砂姜黑土地力贡献与培肥技术研究

Study on The Contribution of Shajiang Black Soil Fertilizer and the Appropriate Technical Measures of Applying Fertilizer

对杨柳点长期定位培肥试验和相关小麦施肥试验资料进行分析,结果表明:地力贡献与小麦施肥产量、地力贡献率之间呈线性正相关,高产田块地力贡献在小麦施肥产量中占主要地位。砂姜黑土地力贡献主要受土壤有机质和速效磷含量的影响,速效钾含量尚不是限制因子。长期连续施肥条件下．不同的土壤养分指标受有机无机配比的影响不同。有机质和氮素养分含量偏低的土壤,要通过增施有机肥加以培肥,磷素或钾素养分偏低的土壤可以通过增施有机肥或化肥来培肥。

Crop yields, soil fertility and nutrient balance were studied systematically according to the results of a 23-year located experiment and the relative fertilizer experiments in wheat. The results show that the correlation between the contribution of soil fertilizer to crop yield and wheat yield, contribution coefficient of soil fertilizer to crop yield were significantly positive. The contributions of soil fertilizer to crop yield occupied main proportion of wheat yield in applying fertilizer. The contribution of soil fertilizer to crop yield was mainly effected by soil organic matter and available P content. Application of organic manure would be an efficient way for raising soil fertility on shajiang black soil with lower content of the soil organic matter and nitrogen. Application of organic manure or PK nutrients would be an efficient way for raising soil fertility on shajiang black soil with lower content of N and P.