长期使用化肥会造成土壤板结、地力下降、农作物减产等弊端,更可怕地是会给食品安全带来不利影响。为此,专家们迫切呼吁减少化肥使用量,多使用新型生物肥,多施有机肥;广大农民也迫切需要一种新型肥料来满足农业生产的需要。因此,开发利用畜禽粪便既能变废为宝,减少环境污染,又具有较高的社会效益和一定的经济效益,是创造节约型社会、促进农业可持续发展的必然要求。针对上述因素,以奶牛 Long-term use of fertilizers can cause soil compaction, decreased soil fertility, crop yield shortcomings, even more alarming will bring adverse effects on food safety. To this end, experts urgently urged to reduce the use of chemical fertilizers, use more new biological fertilizers and apply more organic fertilizers. The vast number of peasants also urgently needed a new type of fertilizer to meet the needs of agricultural production. Therefore, the development and utilization of livestock and poultry waste can not only turn waste into treasure, reduce environmental pollution, but also have high social benefits and certain economic benefits. It is an inevitable requirement for creating a conservation-oriented society and promoting agricultural sustainable development. For the above factors, the cow