俗话说的好,“没有万斤肥,难打千斤粮”。按农家肥的含氮量,万斤农肥含氮约在15～20公斤之间,当年吸收利用约在40～50%。就是这个施肥量,亩产也不过250～300公斤,所以没有化肥补充是难上亩产千斤的,况且在农区也没有那么大的农肥量。近几年来,我们逐步摸索出一套小麦套玉米亩 As the saying goes, “There is no kilogram of fat, hard to beat the grain.” According to the nitrogen content of farmyard manure, kilograms of agricultural fertilizer nitrogen content of about 15 to 20 kg, when the absorption and utilization of about 40 to 50%. This is the amount of fertilizer, but also 250 to 300 kilograms per mu, so there is no fertilizer to increase hard to produce a kilogram, but also in the agricultural areas are not so large amount of fertilizer. In recent years, we have gradually figured out a set of wheat acres of corn