通过增加人工合成化学品的用量可以提高农作物的产量,这一经久不衰的观点现已过时。在2007年使用的24亿公斤的农药中,美国大约占了总量的20%。显而易见,美国农民对于农药的使用更加节制—每公顷耕地仅2.2公斤。相比而言,中国农民每公顷耕地使用的农药接近10.3公斤。原因可能是农业部门的培训较少,以及没有替代技术或者替代技术不够普及。中国的情况与世界上 This enduring view is now outdated by increasing crop yields by increasing the use of synthetic chemicals. Of the 2.4 billion kilograms of pesticides used in 2007, the United States accounts for about 20% of the total. It is obvious that the use of pesticides by American farmers is more modest - only 2.2 kg per hectare of arable land. In contrast, Chinese peasants use nearly 10.3 kilograms of pesticides per hectare of arable land. The reason may be that there is less training in the agricultural sector, and there is no or no alternative technology available. China’s situation with the world