Study on the effect of high stubble straw returning machine in southern double-cropping rice paddy field
In order to investigate the effect of the self-developed high stubble straw returning machine in southern double-cropping rice paddy field,the 'Yuanguzhenxiang' was used in the field trial as an experimental cultivar,taking the conventional straw returning machine as a control group. The tillage effect of the machine was investigated by returning stubble straws of different heights in the early rice,and the indicators of transplanting quality,population quality construction,yield and yield composition of the late rice were also studied. The results showed that compared to the control group,during the same stubble height,the effect of the self-developed high stubble straw returning machine was significant. The tillage depth,tillage depth stability,stubble depth,ground flatness and vegetation coverage were increased by 5.18％,4.64％,20.85％,21.61％ and 4.43％,the transplanting quality of missing rate,floating rate,hurting rate and overturning rate decreased by 28.79％,23.17％,29.84％ and 45.02％,and the qualified rate of evenness and transplanting depth increased by 1.40％ and 1.65％,the tillers in-creased by 2.52％-6.62％,the SPAD(27d after transplanting)increased by 3.59％-6.53％,the dry matter weight (34 d after transplanting) increased by 1.78％-4.81％,the panicle dry weight and harvest index increased by 3.39％ and 2.16％,the effective panicle,grain number per panicle,1000-grain weight,seed setting rate and theo-retical yield increased by 2.52％,1.34％,0.08％,1.41％ and 5.47％,the harvested yield increased 268.86 kg·hm-2 and the average adding rate was 4.10％,respectively. The machine has a strong adaptability to straw stubble and good work effect,which is suitable for promotion and application in southern double-cropping rice paddy field.
万方数据
维普
