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人类进入了二十一世纪,在科技日新月异,社会飞速发展的年代,为了民族兴旺,人们崇尚自然,追求绿色的意识比以往任何时候都更加强烈。化学肥料和化学农药,在推动农林牧业生产的发展上发挥了一定作用。但是,由于化肥利用效率很低,造成大量养分损失,使得板结土壤,污染水质的情况日趋严重。由于化学农药是直接杀虫、灭菌、除草的物质,无论低毒或剧毒,带来的副作用都是不可低估的。比如过去农业施用的六六六、滴滴涕等农药,在土壤中的残存期长达60年以上,能够直接随植物体转入叶片及果实之中,最终给人类的生存和发展带来严重威胁。
Human beings have entered the 21st century. With the ever-changing science and technology and the rapid social development, people are advocating nature and their pursuit of greenness is stronger than ever before. Chemical fertilizers and chemical pesticides have played a role in promoting the development of agriculture, forestry, animal husbandry and production. However, due to the low efficiency of chemical fertilizer use, resulting in a large number of nutrient losses, making the compaction of soil pollution of water quality is getting worse. As chemical pesticides are direct insecticidal, sterilization, weeding substances, whether low toxicity or highly toxic, the side effects are not to be underestimated. For example, in the past, pesticides such as BHC and DDT used in agriculture have remained in the soil for more than 60 years and can be directly transferred into the leaves and fruits of plants, eventually posing a serious threat to human survival and development.