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通过调查武汉市畜禽养殖粪便、作物秸秆和绿肥资源的总量、分布以及目前利用的现状,量化分析相应区域有机资源利用情况,以此为基础衡量武汉市有机钾(K2O)资源总量及其利用现状,总结有机钾资源利用中存在的问题,并提出建议。结果表明,武汉市畜禽粪便、秸秆及绿肥中有机钾资源年产总量约为115 027 t,其中,畜禽粪便中有机钾总量为60 796 t,占有机钾年产量的52.85%;秸秆中有机钾总量为49 657 t,占有机钾年产量的43.17%,绿肥中有机钾总量为4 574 t,仅占有机钾年产量的3.98%。畜禽粪便48.44%直接施入田中,21.74%喂鱼,14.39%做沼气利用,仅17.28%做有机肥;农作物秸秆有60.68%被农民焚烧或是闲置,仅有13.98%还田。现有利用方式造成有机钾资源的严重浪费,应改变现有利用方式,提高有机钾肥的利用率。
By investigating the total amount and distribution of excrement, crop stalks and green manure resources in Wuhan, the status quo of utilization of organic manure in Wuhan was quantitatively analyzed. Based on this, the total amount of organic potassium (K2O) resources in Wuhan and Based on the status quo, the problems existing in the utilization of organic potassium resources are summarized and suggestions are put forward. The results showed that the annual total amount of organic potassium resources in livestock manure, straw and green manure in Wuhan was 115 027 t. Among them, the total amount of organic potassium in livestock manure was 60 796 t, accounting for 52.85% of the annual yield of organic potassium. The total amount of organic potassium in straw is 49 657 t, accounting for 43.17% of the annual output of organic potassium, and the total amount of organic potassium in green manure is 4 574 t, accounting for only 3.98% of the annual output of organic potassium. Livestock manure 48.44% directly into the field, 21.74% feed fish, 14.39% do biogas utilization, only 17.28% do organic fertilizer; 60.68% crop straw was peasants burning or idle, only 13.98% back to the field. The existing utilization methods cause a serious waste of organic potassium resources, and the existing utilization methods should be changed to improve the utilization rate of organic potassium fertilizer.