Effect of organic fertilizer and lime combination on ameliorating acid soil in south China
In order to clarify the ameliorating effect of organic fertilizer and lime on acidic soil in south China,a field trial was conducted to study the effects of single and combined application of organic fertilizer and lime on the acidification properties,rice growth and yield of acidic soil in double cropping rice areas.The experiment included five treatments:no fertilization(CK),single application of controlled release fertilizer(CF),controlled release fertilizer+application of lime(LM),controlled release fertilizer+application of organic fertilizer(OF),and controlled release fertilizer+lime combined with organic fertilizer(CLO).Except for CK,the nutrients in each treatment remained consistent,and the materials were all applied to the soil before rice transplantation.The results showed that the combination treatment had the best improvement effect on soil pH,increasing by 0.42 units,while the OF and LM treatments were 0.27 and 0.37,respectively.The organic matter content in the soil treated with OF was the highest,reaching 44.46 g·kg-1,followed by the combined application of CLO,reaching 37.76 g·kg-1,CLO treatments significantly reduced soil exchangeable acid content by 71.4%.There is a significant negative correlation between soil pH and exchangeable aluminum and hydrogen.The absolute slopes of the regression equations for exchangeable hydrogen and exchangeable aluminum with pH are 1.356 8 and 0.156 0,respectively.The total amount of exchangeable base ions in the soil treated with a single application of lime reached 7.52 cmol·kg-1,significantly higher than other treatments,followed by the combined application of CLO,reaching 6.92 cmol·kg-1.The combination application treatment can increase the chlorophyll content in rice leaves during the filling period,resulting in the best yield increase effect.The comprehensive research results indicate that the combination of organic fertilizer and lime improves acidified soil more than a single application,which can provide data support for subsequent acidified farmland management.
south Chinaacid soilorganic fertilizerlimedouble-cropping riceameliorating acid soil
国家科技期刊平台
NSTL
万方数据
维普
