我国主要粮食作物秸秆还田养分资源量及其对小麦化肥减施的启示

李廷亮,王宇峰,王嘉豪,栗丽,谢钧宇,李丽娜,黄晓磊,谢英荷

Nutrient Resource Quantity from Main Grain Crop Straw Incorporation and Its Enlightenment on Chemical Fertilizer Reduction in Wheat Production in China

LI TingLiang,WANG YuFeng,WANG JiaHao,LI Li,XIE JunYu,LI LiNa,HUANG XiaoLei,XIE YingHe

表5 我国主要粮食作物秸秆当季养分释放率

Table 5 Nutrients release rate of main grain crop straw during the next crop growth period in China

秸秆腐解及养分释放率 Rate of straw decomposition and nutrients release 水稻 Rice 小麦 Wheat 玉米 Maize 秸秆腐解率 Straw decomposition rate (%) 58.6±11.8(29) 60.0±10.0(23) 57.9±16.9(75) 氮释放率 N release rate (%) 54.9±14.4(30) 51.4±8.8(21) 61.9±18.5(55) 磷释放率 P release rate (%) 60.9±22.4(28) 65.3±15.7(21) 73.0±18.4(55) 钾释放率 K release rate (%) 90.1±11.6(27) 93.3±8.3(20) 92.4± 6.8(54)