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利用网袋法模拟烟田中秸秆还田,探索研究秸秆腐解剂对不同秸秆的腐解特征和养分释放特征。结果表明:经过100 d腐解后,施用秸秆腐解剂与否,秸秆腐解率和有机质释放率秸秆都为油菜秸秆>水稻秸秆>玉米秸秆,施用秸秆腐解剂后玉米秸秆、水稻秸秆、油菜秸秆腐解速度分别提高9.60%、8.22%、6.42%,油菜秸秆、水稻秸秆、玉米秸秆有机质的释放速度分别提高了1.58%、1.34%、1.08%;未施用秸秆腐解剂时,秸秆速效氮释放率为油菜秸秆>水稻秸秆>玉米秸秆,施用秸秆腐解剂后,秸秆速效氮释放率水稻秸秆>油菜秸秆>玉米秸秆,油菜秸秆、水稻秸秆、玉米秸秆的速效氮释放速度分别提高了4.10%、2.48%、1.72%;施用秸秆腐解剂与否,秸秆速效磷、速效钾的释放率都是水稻秸秆>油菜秸秆>玉米秸秆,施用秸秆腐解剂对玉米秸秆、水稻秸秆、油菜秸秆速效磷、速效钾释放速度的提高效果不明显。
Mesh-bag method was used to simulate straw returning to tobacco field, and explored the decomposing characteristics and nutrient releasing characteristics of straw decomposing agent to different straw. The results showed that after 100 days of decomposing, straw decomposition agent or not, decomposition rate of straw and organic matter release rate straw were all rape straw> rice straw> corn stalk. After application of straw decomposer, corn straw, rice straw, The decomposition rate of rapeseed straw increased by 9.60%, 8.22%, 6.42%, 1.58%, 1.34%, 1.08% respectively. When straw decomposer was not applied, the straw quick-dissolving rate Nitrogen release rate was rapeseed straw> rice straw> corn stalk. After application of straw decomposer, the available nitrogen release rate of straw stalk, rape straw, corn stover, rape straw, rice straw and corn stalk increased respectively 4.10%, 2.48% and 1.72% respectively. The application rates of straw decomposers or not, available phosphorus and available potassium in the straw were all higher than those in the straw, rape straw and rapeseed Straw available phosphorus, available potassium release rate of the effect is not obvious.