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棕壤肥料长期定位试验结果表明,连续15年培肥后,磷肥、有机肥残留养分对粮豆作物的增产效果至少在三年以上,低量有机肥与磷钾肥配施残留养分的增产率最高,为119.46%。长期施用有机肥既能增加土壤有机质,还能促进土壤磷有效性的发挥;棕壤条件下,土壤速效磷与有机质有明显的正相关关系(r=0.841,α=0.01,n=36)。在投入磷素相等的情况下,土壤中残留的全磷含量则主要受作物吸磷量的制约。有机—无机结合培肥是实现农业可持续发展的重要措施。
The results of long-term experiment on brown soil fertilizers showed that after 15 consecutive years of fertilization, the effect of residual phosphorus and organic fertilizer on soybean grain yield increased at least for more than three years, and the lowest yield of residual organic fertilizer was the highest , 119.46%. Long-term application of organic fertilizer not only increased soil organic matter, but also promoted the effective use of soil phosphorus. Under the condition of brown soil, there was a significant positive correlation between soil available phosphorus and organic matter (r = 0.841, α = 0.01, n = 36). In the case of equal input of phosphorus, the total residual phosphorus in soil is mainly controlled by the amount of phosphorus uptake by crops. Organic-inorganic fertilization is an important measure to realize the sustainable development of agriculture.