邵代兴 1罗元琼 1吴正肖 1李世江 2张明刚 2苟世新 1周开芳1
作者信息
- 1. 遵义市农村发展服务中心,贵州遵义 563000
- 2. 绥阳县农业农村局,贵州绥阳 563300
- 折叠
摘要
Abstract
In order to explore the effects of different amendments on the properties of acid soil,nutrient absorption and yield of rice,and heavy metal absorption by rice,and provide technical basis for the amelioration of acid soil,this study conducted field experiments on rice.Four treatments including three different soil amendments(quicklime,Yitukang,Chuge)and no soil amendment,were set to test the soil pH value,exchangeable aluminum content,exchangeable acid content,cation exchange capacity,main nutrient content of rice plants and grains,and heavy metal content of rice in each treatment.The rice yield and yield composition factors,and soil properties were determined,as well as the changes of main nutrient content,yield and heavy metal content of rice.The results showed that compared with the control(no soil amendment),all soil amendment treatments could increase the soil pH value,reduce the contents of soil exchangeable acid and soil exchangeable aluminum,and the application of quicklime had the best effect.Different soil amendments could increase soil cation content,with an increasing range of 21% to 24% .Among them,the soil cation content was the highest in the Yitukang treatment.Soil amendments could increase the contents of total nitrogen,total phosphorus,and total potassium of rice grains,increase the total phosphorus content of rice plants,but reduce the contents of total nitrogen and total potassium of rice plants.Applying soil amendments could increase the number of effective ear,1000-grain weight and yield of rice.The application of soil amendments reduced the absorption of heavy metal Cd by rice,and different soil amendments had different effects on the absorption of Cr by rice.Therefore,suitable soil amendments can increase the pH value of acid soil,reduce the contents of exchangeable aluminum and exchangeable acid,increase the content of soil cations,increase the nutrient absorption and yield of rice,and reduce the absorption of heavy metal Cd by rice.关键词
土壤改良剂/酸性土壤/土壤性质/水稻Key words
soil amendment/acid soil/soil property/rice分类
农业科技
