Effects of Different Plowing Depth on Soil Nutrients and Rice Yield
[Objective]To understand the effects of different tillage depths on soil water storage and moisture conservation,nutrients and crop yield in the Yellow River Diversion Irrigation Area,and explore a reasonable tillage depth that can fully create a good growth environment for rice,such as water,fertilizer and gas,so as to provide a theoretical reference for the reasonable construction of the tilth layer of rice and the cultivation of high yield crops in the Yellow River Diversion Irrigation Area.[Method]The experiment adopted a completely random design and set up three tillage depth treatments,namely 22-25,30-32 and 38-42 cm,to study the effects of different tillage depth on soil bulk density,water content,soil nutrients and rice yield.[Result]The soil moisture content under different tillage depth was higher under 30-32 cm tillage;The soil bulk density was lower in the treatment of 22-25 cm ploughing under 0-10 cm soil layer,lower in the treatment of 30-32 cm ploug-hing and 38-42 cm ploughing under 20-40 cm soil layer,and the treatment of 30-32 cm ploughing was significantly lower than that of 38-42 cm ploughing.The content of organic matter,available phosphorus and available potassium in 0-20 cm soil layer was higher in 30-32 cm ploughing treatment,and in 20-40 cm soil layer was higher in 38-42 cm ploughing treatment.The rice yield of 30-32 cm tillage was signifi-cantly higher than that of 22-25 cm and 38-42 cm tillage;Through the comprehensive evaluation of principal components,it was found that the treatment of 30-32 cm tillage>38-42 cm tillage>22-25 cm tillage.[Conclusion]Different ploughing depths can affect the soil structure and soil nutrients in the tilth layer,thereby affecting the water storage and heat preservation effect of the soil,and promoting crop growth and yield.Under local soil conditions,the 30-32 cm ploughing treatment has the best comprehensive improvement effect on the soil,and the rice yield is high.
Depth of ploughingBulk densityMoisture contentSoil nutrientsRiceOutput
万方数据
维普
