论文部分内容阅读
为掌握土壤有机质提升项目实施中,开展稻田粮油作物秸秆还田所具有的成效,在项目区选择有代表性的地块,固定设置常规施肥区与有机质提升区,定点持续(3年)观测、监测研究。结果表明,秸秆还田对于当季作物具有一定的增产作用,3年5个点油菜平均增产了8.25%,水稻平均增产了4.26%,并且差异性达到了显著水平;而土壤理化指标方面,3年之后,pH维持稳定,有效磷、缓效钾、速效钾这3项增幅超过20%,全磷、碱解氮增幅10%~20%,除土壤CEC外,其他指标增幅差异水平均为显著。因此认为,持续3年秸秆还田,效应明显,作物产量有一定增加,土壤养分得到较大改善,土壤质量得到有效提升。
In order to grasp the effect of carrying out crop straw returning from paddy field grain and oil crops during the implementation of soil organic matter upgrading project, select representative plots in the project area, and set conventional fertilization area and organic matter upgrading area fixedly and continuously for 3 years, the study. The results showed that returning straw to field could increase the yield of the crop. The average yield of 5-point rape at 3 years increased by 8.25% and that of rice increased by 4.26% on average, and the difference reached a significant level. In terms of soil physical and chemical indexes, 3 Years later, the pH was stable, the available phosphorus, slow-acting potassium and available potassium increased by more than 20%, total phosphorus and alkaline hydrolysis increased by 10% -20%, except for soil CEC, the differences of other indicators were significant . Therefore, it is considered that the effect of returning straw to soil for 3 years has been obvious, the yield of crops has been increased, the soil nutrients have been greatly improved, and the soil quality has been effectively improved.