目前 ,秦安县有不少果园由于大量施用化学肥料而使土壤团粒结构破坏、微生物活动减少、土壤有机质含量降低 ,造成土壤板结、通气不良、肥料利用率下降 ,给果树生长发育带来不利影响。九龙复合生物菌肥是用人工选择和理化因子诱变选育出高效菌株作菌种 ,经过发酵繁殖形成大量有 At present, many orchards in Qin’an County, due to the heavy application of chemical fertilizers, destroy the structure of soil aggregates, reduce microbial activity and reduce the content of soil organic matter, resulting in soil compaction, poor aeration and decreased fertilizer utilization, adversely affecting the growth and development of fruit trees. Kowloon compound biological fertilizer is artificial selection and physical and chemical factor mutation breeding high-efficient strains for bacteria, after fermentation to form a large number of