5Lou Y L, Xu M G, Wang W, et al. Return rate of straw residue affects soil organic C sequestration by chemical fertilization.Soil & Tillage Research.2012,113:70-73.
6Ma E D, Zhang G B, Ma J, et al. Effects of rice straw returning methods on N20 emission during wheat-growing season[J]. Nutr Cycl Agroecosyst, 2010,88:463 -469.