麦稻秸杆全量机械还田定位试验研究

Located experiment on full-volume straw returning in rice field by mechanical force

麦稻秸秆全量机械还田定位试验表明,秸秆还田显著提高了土壤的有机质含量,促进水稻田中后期释氮,增加水稻干物质积累量而增产。试验数据分析还表明,秸秆还田因改善了水稻的穗粒结构而增产,主要表现为增穗增粒增库容,而对结实率和千粒重影响不大。实施秸秆还田技术,要适当增加速效氮的使用量,同时采取节水灌溉技术。

Located experiment on full-volume straw returning of wheat and rice in rice field by mechanical force showed that straw signifi- cantly increase the organic matter content of soil, promote post-release of nitrogen in rice fields, and increase the amount of dry matter accu- mulation and production of rice. Test data analysis also showed that straw improve the structure of yield, mainly for increasing storage capac- ity by both of increasing spike number per unit and increasing spikelet number per panicle, while little effect on the seed setting rate and grain weight. To implementate the technology of straw returning, it is very important to appropriately increase available nitrogen, phosphorus and potassium,while adopting water-saving irrigation technologies.