Preliminary Study On The Effect Of Soil Conditioner On Acid Soi Improvement

Since the reform and opening up,with the accelerated process of industrialization in China,a large number of air in the air increased rapidly,and then the formation of acid rain settling into the soil,leading to soil acidification,especially in southern China is more serious[1].Plant growth and development will be affected by changes in soil pH,because most of the plants are adapted to neutral or slightly acidic soil growth,if the soil PH value is too low,will lead to a large number of pests and diseases caused by plants can not grow and even death,But also enhance the activity of toxic metal elements in the soil.As China’s air pollution continues to increase,resulting in acid rain and acid deposition continue to increase,and most farmers are still dependent on fertilizer to improve crop yields,excessive use of acidic fertilizers,so that China’s farmland soil acidification is becoming increasingly serious,so,China’s acidification of soil remediation is imminent.In this severe soil environment,China began to invest a lot of economic,technical and human resources to improve the soil environment.In recent years,people have developed a variety of soil conditioner,domestic and foreign research and development of soil conditioner also showed a hundred schools of thought contend,the domestic market,the number and type of soil conditioner is also increasing,so the acidic soil Improvement is highly valued.Traditional soil conditioning agents such as lime or limestone can only reduce soil acidity and reduce soil migration,and will not provide the necessary nutrients for crop growth and development,and the soil conditioner used in this experiment can improve the nutrient availability,But also by improving the physical and chemical properties of the soil to promote crop water and nutrient absorption.In this experiment,the acid field of southern rice was used as the research object,and the soil conditioner was not only able to slow the migration of soil nutrient by applying lime and new soil conditioner to improve the physical and chemical properties of acidic soil And reduce the soil acidity,but also improve the soil nutrient content,and find the most reasonable application for the soil conditioner to provide the basis for the promotion and development.The conclusions are as follows:The soil physical structure improvement was the best after applying 150 kg/mu of soil conditioner in acid paddy field,and the soil porosity increased by 7.1%,the soil bulk density decreased by 7.4%compared with the control,and the soil water stability was also increased significantly body.The effect of soil conditioner on the improvement of chemical properties of acid paddy field is more obvious.Compared with the application of lime,the application of soil conditioner in addition to improving soil pH and increasing soil exchangeable calcium content,in improving the other soil nutrient content and organic matter And other aspects of the effect is more significant.The effect of 150 kg/mu soil conditioner on the main agronomic traits of rice paddy field was the best,which could increase the effective panicle number per panicle,the number of grains per panicle and the seed setting rate,and the yield was the best,37.3kg,increased by 8.2%,the yield difference reached a significant level.