GUANGZHOU HTD INTERNATIONAL , https://www.htdmask.com
No-tillage sowing is done at the provincial level, but the yield of no-tillage summer maize is greatly affected by rainfall. Regarding the effect of ploughing and no-tillage, one view is that no-tillage can maintain soil moisture, increase soil water storage capacity and water storage capacity. Another view is that no-tillage has exacerbated the evaporation of soil moisture. Previous studies on the value of rainfall with no-tillage and the superiority of water retention and soil conservation are less; at the same time, the amount of rainfall on no-tillage straw covering summer maize yield and water use efficiency The impact of the study is also lacking. For the determination of rainfall, self-reported rainfall gauges can be used. The results obtained can play an important role in the research.
Rainfall and cultivation have a significant effect on the yield of summer maize. Some studies suggest that the harvest index of summer corn is 0.38 to 0.60. In this study, the harvest index of summer corn was low at the rainfall of 250mm from June to September; and the harvest of no-tillage under the rainfall of 250~450mm. The index was significantly higher than tillage and no-tillage, and the index of no-tillage harvest was significantly higher in the 250-350mm rainfall than in the tillage, and there was no significant difference between the no-tillage harvest index and the tillage in the 450mm rainfall. This indicates that the lack of rainfall can reduce the harvest index and plow tillage. The increase of summer corn harvest index with the increase of rainfall is higher than that of no-tillage and no-tillage. Compared with 250mm rainfall, the increase in output under 450mm rainfall is higher than that of no-tillage and no-tillage cover treatments, indicating that the tillage The increase in rainfall yield was the highest. From June to September, the no-tillage coverage and no-tillage increase in the 250 mm rainfall was higher than that in the tillage. The no-tillage coverage under the 450 mm rainfall was lower than that under the tillage, and the yield of no-tillage summer maize was lower than that of the tillage. .
The measurement of rainfall through a self-reported rain gauge and the benefit of no-tillage summer maize water compared to ploughing, the yield of no-tillage was greatly affected by rainfall. No-tillage and no-tillage coverage with 250-350mm rainfall inhibited the evaporation of soil moisture, improved soil water storage, improved soil moisture conditions, and improved yield and water use efficiency. Compared to plowing, no-tillage and summer maize were grown at 450mm rainfall. There was no significant difference between water use efficiency and tillage, and the yield was even lower than that of tillage. Compared with tillage, no-tillage can significantly increase the yield of summer maize, soil water storage and water use efficiency, and with the increase of rainfall, summer maize The yield increased significantly, but the effect of rainfall on water use efficiency was small.
The scope of corn planting in China is very extensive. It is the second most important food crop after rice. It is worth investigating to improve the yield and water use efficiency of corn, and has good ecological and environmental benefits. Because improving the utilization rate of summer corn to water resources is an urgent problem to be solved in the cultivation of summer corn, and it can also reduce the water requirement of corn and relieve environmental pressure.