Study on the ecological effect of crop residues burned or incorporated in fidd in North Central Irrigated Area of China
华北灌溉区秸秆焚烧与直接还田生态效应研究

Results from the experiment show that mulching wheat-straw on the soil in summer contributes to preserve soil moisture,lower soil temperature,increase microbe amounts in the surface soil and benefits the growth of the maize and the plot yield.Burning crop residues in field can obviously improve the content of available soil nutrients.Mulching wheat-straw on soil surface can inhibit the emergence of weeds,while burning can kill the seeds of weeds.Not all pests increase and diseases become worse because of the incorporation of crop residues.Plot yield with crop residues burned decreases compared to that of crop residues incorporation.