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以常用有机肥料牛厩肥、猪厩肥、鸡粪及作物秸秆、油菜绿肥为材料,研究了这些有机物的全钾、速效钾和缓效钾的含量状况,以及它们对土壤钾及作物吸钾的供应能力。结果表明:(1) 三种有机粪肥及作物秸秆、绿肥中含钾量为0-85 % ～4-50 % ,其中有32-7 % ～69-7 % 为速效态钾,1-7 % ～25-0 % 为缓效态钾;(2) 肥料与土壤共同培养150 d 后,约有50 % ～80 % 的速效态钾和缓效态钾仍以两种形态存在于土壤之中,但其中速效态钾比例明显下降,缓效态钾比例显著提高。不同肥料种类和土壤类型对其有影响;(3) 各种有机肥均可显著提高玉米幼苗生物产量和吸钾量;(4) 有机肥供钾效果与土壤缓效钾关系较密切。
The organic manure manure, pig manure, chicken manure and crop stalks and rapeseed manure were used to study the content of total potassium, available potassium and slow-acting potassium of these organic compounds and their ability to supply potassium to soil potassium and crops . The results showed that: (1) Three types of organic manure and crop stalks were used. The content of potassium in green manure was 0-85% ~ 4-50%, of which 32-7% ~ 69-7% were available K, 1-7% ~ 25-0% is slow-acting potassium; (2) After 150 days of co-cultivation with fertilizers and soil, about 50% ~ 80% of the available K and slow K remain in the soil in two forms, Among them, the ratio of available potassium decreased obviously while the proportion of slowly available potassium increased significantly. Different types of fertilizers and soil types have an impact on them; (3) Various organic fertilizers can significantly increase the biomass and potassium uptake of maize seedlings; (4) The effect of potassium supply by organic manure is more closely related to soil available potassium.