中国农业科学2011，Vol.44Issue(16)：3351-3360,10.DOI:10.3864/j.issn.0578-1752.2011.16.007
不同水稻栽培模式和秸秆还田方式下的油菜、小麦秸秆腐解特征
Decomposition Characteristics of Rapeseed and Wheat Straws Under Different Rice Cultivations and Straw Mulching Models
摘要
Abstract
[Objective] The decomposition characteristics and nutrient releasing patterns of rapeseed and wheat straws were studied under different rice cultivations and straw mulching models in 2007 and 2008 growing seasons, respectively!Method]Wheat and rapeseed straws were wrapped in net nylon bags and put on the surface or embedded into the soil under conventional cultivation and water-saving cultivation models. [Result] The results showed that the decomposition rate of straw was faster in the first 30 days and then slowed down until the end of the experiment. Under water-saving cultivation model, 90 days after straws were embedded into soil, the decomposition rate was high up to 61.06%. The cumulative decomposition rates of wheat and rapeseed straw were 48.88%-59.95% and S0.88%-61.06%, respectively. Under conventional cultivation model, the straws that were mulched decomposed faster than the straws that were embedded into the soil did. With straw mulching, there was no obvious difference in decompositionrates between the two cultivation models. When straws were embedded into the soil, the straw under water-saving cultivation model decomposed faster than the straw under the conventional cultivation model. The sequence of nutrients releasing rates were K>P> N=C. C releasing rates of wheat straw and rapeseed straw were up to 48.29-63.79% and 50.29-66.55%, and N were up to 48.35-52.83% and 46.48%-57.67%, and P were up to 54.83%-67.49% and 56.44%-75.64%, and K were up to 91.98%-95.99% and 92.31%-96.24% after 90 days of decomposition, respectively. The effect of cultivation model and incorporation method on N, P and C releasing patterns had almost the same trend with the decomposition of straw. K release rate was more than 90% after 30 days of decomposition. [ Conclusion ] It is concluded that on the basis of straw mulching, the water-saving cultivation model can promote the straw to decompose and to release the nutrients.关键词
水稻栽培模式/秸秆还田方式/油菜秸秆/小麦秸秆/腐解Key words
rice cultivation model/ straw mulching method/ rapeseed straw/ wheat straw/ decomposition引用本文复制引用
武际,郭熙盛,王允青,许征宇,鲁剑巍..不同水稻栽培模式和秸秆还田方式下的油菜、小麦秸秆腐解特征[J].中国农业科学,2011,44(16):3351-3360,10.基金项目
国家“十一五”科技支撑计划重点项目(2007BAD89B10,2008BADA4B08 （）
