Alkaline Materials and Organic Materials Remediate Soil Acidification in Paddy Fields and Increase Rice Yield
In the remediation of acidified paddy fields,it is important to reduce soil acid while improving soil fertility.In this study,field experiments were carried out with five treatments:conventional fertilization(CK),CK+lime(T1),CK+pig manure(T2),CK+microbial agent(T3),and CK+lime+pig manure(T4).The variations in soil acidification indicators,fertility indicators,rice yield,and yield components were analyzed.The results showed that compared with CK,T1 and T4 increased the soil pH by 0.24 and 0.33 while decreasing the exchangeable acid by 16.8%and 25.4%and exchangeable Al by 50.8%and 75.4%,respectively.T2 decreased the exchangeable acid and exchangeable Al by 19.3%and 59.0%,respectively,while it caused no significant variation in soil pH compared with CK.The soil organic matter,available nitrogen,available phosphorus,available potassium,and cation exchange capacity in T4 were 9.2%,78.0%,21.8%,23.2%,and 52.9%,respectively,higher than those in CK.The soil organic matter,available nitrogen,available phosphorus,and cation exchange capacity in T1,T2,and T3 showed no significant differences from those in CK,while the soil available potassium in T1,T2,and T3 were significantly higher than that in CK.Among all treatments,T2 and T4 had higher rice yields,which increased by 6.8%and 8.4%,respectively,compared with that in CK.Furthermore,the analysis of yield components showed that pig manure and pig manure+lime increased rice yield mainly by improving the seed-setting rate.Therefore,the combined use of lime and pig manure was a reasonable measure for remediating soil acidification and improving soil fertility and production capacity in acidified paddy fields.
acidified paddy fieldscombined use of lime and pig manureorganic materialssoil remediationrice yield
万方数据
维普
