随着苹果产业的蓬勃发展和市场的迫切需求,无公害栽培已成为苹果生产的主要方向,市场前景广阔,在这种市场背景和需求下,科学利用沼肥显得尤为重要。沼肥是优质高效有机肥,养分含量高而全,富含苹果生长所必需的氮、磷、钾等元素及硼、铜、铁、锰、锌等微 With the vigorous development of the apple industry and the urgent needs of the market, pollution-free cultivation has become the main direction of apple production and the market has a bright future. With this market background and demand, it is particularly important to use biogas fertilizer in a scientific way. Biogas fertilizer is a high-quality and high-efficient organic fertilizer with high nutrient content and high content of nitrogen, phosphorus and potassium, and boron, copper, iron, manganese and zinc, which are necessary for apple growth