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通过连续 5年定位试验 ,研究了 6种不同有机物料在黄刚土上的分解速率和腐殖化系数 ,及有机物料配合磷、钾养分的不同投入量对平衡土壤养分的作用。认为在与大田栽培条件相同时 ,有机物料 1年内的分解速率以稻草、麦草最快 ,猪粪其次 ,油菜秆最慢 ;要提高黄刚土肥力 ,又确保当季稳产高产 ,在保证氮素供应时 (试验条件下为 1 87.5～ 2 1 0kg/ ( hm2 ·季 ) ) ,有机物料 (秸秆 )用量应不少于 4 50 0 kg/ ( hm2 · a) ,同时配施的磷、钾养分量相当于作物吸收量的 1 .2倍左右
Through five consecutive years of location experiment, the decomposition rate and humification coefficient of six different organic materials on Huanggang soil and the effects of organic materials with different inputs of phosphorus and potassium on the balance of soil nutrients were studied. The results showed that the decomposition rates of organic materials in one year were the fastest in straw and wheat straw and the second in pig manure and the slowest in rape stalk. In order to increase the fertility of Huanggang soil and ensure the stable and high yield in the season, At the time of supply (1 87.5 ~ 210kg / (hm2 · season) under the test conditions), the amount of organic material (straw) should not be less than 4 50 kg / (hm2 · a) The amount of crop absorption is equivalent to about 1.2 times