Effects of application of wheat straw on straw Zn release and soil Zn supply capacity during the decomposition Regulation and effect of 100% straw return on crop yield and environment Effects of planting and straw returning of transgenic Bt maize on soil enzyme activities under field condition Effects of Bt corn straw decomposition on soil enzyme activities and soil fertility The eco-process of agricultural organic matter decomposition under different soil conditions Influence of the straw decomposition of Bt transgenic rice on soil culturable microbial flora Effects of straw addition on decomposition, transformation and composition of soil organic carbon pool The effects of elevated atmospheric CO2 concentration on wheat straw decomposition and nitrogen distribution in paddy soil