周年秸秆还田对农田土壤固碳及冬小麦-夏玉米产量的影响

李昊昱,孟兆良,庞党伟,陈金,侯永坤,崔海兴,金敏,王振林,李勇

Effect of annual straw return model on soil carbon sequestration and crop yields in winter wheat-summer maize rotation farmland

Hao-Yu LI,Zhao-Liang MENG,Dang-Wei PANG,Jin CHEN,Yong-Kun HOU,Hai-Xing CUI,Min JIN,Zhen-Lin WANG,Yong LI

表2 两年还田秸秆总量与性质

Table 2 Rate and characteristics of returning-straw

秸秆类型 Straw type 地上部秸秆还田量 The rate of straw returned to the field (kg hm-2) 全氮 Total N (g kg-1) 有机碳 Organic carbon (g kg-1) 碳氮比 C/N 小麦秸秆 Wheat straw 22000 4.75 313.44 66.04 玉米秸秆 Maize straw 16000 7.57 363.77 48.05