A pig manure was ecologically treate d by housefly larvae of two strains(Y strain and Z strain)for one week to observe quantitative change of nutrients an d trace elements.

• 采用室内培养试验方法,观察研究了猪粪经家蝇幼虫(蝇蛆)处理后肥料养分和微量元素含量的变化。