鸟粪石结晶反应在香蕉秸秆堆肥中的试验研究

Experimental Study on the Struvite Crystallization on Composting of Banana Stalk

香蕉秸秆作为一种农业废弃物,往往被农户直接丢弃而造成环境污染,为促进香蕉秸秆的循环利用,在香蕉秸秆堆肥过程中添加氯化镁和磷酸二氢钾,将香蕉秸秆制成含有磷酸铵镁的优质肥料,实现其资源化。试验设2个处理,空白组(香蕉秸秆+EM堆肥菌),试验组(香蕉秸秆+EM堆肥菌+氯化镁+磷酸二氢钾),每个处理3个平行。结果表明:堆肥结束时,试验组养分含量显著高于空白组养分含量,空白组和试验组的碱解氮含量分别为996.8 mg/kg和1974.0 mg/kg,试验组的碱解氮含量约是空白组的2倍;空白组和试验组的有效磷含量分别为0.53 g/kg和12.03 g/kg,分别占全磷含量的7.91%和38.35%。在香蕉秸秆堆肥中添加氯化镁和磷酸二氢钾可以有效减少氮磷的流失,增加堆肥产品中氮磷的含量,能有效实现香蕉秸秆的资源化。

Banana stalk is an agricultural waste,which is often discarded directly by farmers and further cause environmental pollution.To promote the recycling of banana stalk,magnesium chloride and potassium dihydrogen phosphate were added during the composting process of banana stalk to produce high-quality fertilizer which containing ammonium magnesium phosphate to achieve its resource utilization.The experiment was designed as two treatments,blank treatment(banana straw+EM composting bacteria),experimental treatment(banana straw+EM composting bacteria+magnesium chloride+potassium dihydrogen phosphate),and each treatment was three parallels.The results showed that the nutrient content of the experimental group was significantly higher than that of the blank group at the end of compost.The alkaline nutrient content of the blank treatment and the experimental treatment were 996.8 and 1974.0 mg/kg,respectively.The alkaline nitrogen content of the experimental treatment was about twice that of the blank treatment.The effective phosphorus content of the blank treatment and experimental treatment were 0.53 and 12.03 g/kg,accounting for 7.91%and 38.35%of the total phosphorus content,respectively.Adding magnesium chloride and potassium dihydrogen phosphate to banana stalk compost can effectively reduce the loss of nitrogen and phosphorus,increases the content of nitrogen and phosphorus in compost products,and effectively realizes the resource utilization of banana stalk.