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.%Using the method of string to simulate the stalk returned to soil in tobacco field, and the decomposing characteristics and nutrient release features of stalk decomposition accelerator on different crop-stalks were researched.The results showed that after 100 days of decomposition,whether applying stalk decomposition accelerator or not, the stalk decomposition rate and organic matter release rate of stalk ordered as rape stalk＞rice stalk＞corn stalk; after applying stalk decomposition accelerator, the stalk decomposition rate of rape stalk, rice stalk and corn stalk increased by 9.60％, 8.22％ and 6.42％, respectively, and organic matter release rate of rape stalk, rice stalk and corn stalk increased by 1.58％, 1.34％ and 1.08％, respectively; when non-applying stalk decomposition accelerator, the release rate of available nitrogen ordered as rape stalk＞rice stalk＞corn stalk; after applying stalk decomposition accelerate, the release rate of available nitrogen ordered as rice stalk＞rape stalk＞corn stalk, and the release rate of available nitrogen of rice stalk, rape stalk and corn stalk increased by 4.10％ , 2.48％ and 1.72％ , respectively; whether applying stalk decomposition accelerator or not, the release rate of available phosphor and available potassium all ordered as rice stalk＞rape stalk＞corn stalk, and applying stalk decomposition accelerator had no significant improving effect on the release rate of available phosphorus and available potassium of corn stalk, rice stalk and rape stalk.
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