论文部分内容阅读
目前我国是世界上最大的化肥生产国和消费国。单位面积化肥使用量达到167～180kg。根据中国农业大学资源学院的测算,我国化肥的利用率只有20%～30%。在化肥使用中,最有利的时机是结合播种季节。
At present, China is the largest producer of fertilizers and a consuming country in the world. Unit area of fertilizer use reached 167 ~ 180kg. According to the estimation of China Agricultural University Resources Institute, the utilization rate of chemical fertilizers in China is only 20% ~ 30%. In fertilizer use, the most favorable time is to combine the seeding season.