Study On The Aplication Effect Of Soil Conditioners In South Acidic Slope Farmland

according to soil acid in South China Problem, through Combination of pot and field experiments, eight kinds of soil amendments were selected as soils improvement measures,study the effect of different soil amendments and different amount of modifier on Characteristics of crop growth, Soil physical properties and chemical properties, discusses the mechanism of modifier, revealing change law of the properties of acid soils under modifier action. The experiment results are as follows:1. XP2 improver, desulfurization ash conditioner and organic fertilizer has a better effect on Sorghum growth. Affter application of humic acid, humic acid + lime, XP2 improvers, organic fertilizers and desulfurization ash improver on acidic soil, the soil bulk density decreased in different degrees compared with CK, but the results of lime, XP conditioner, saled conditioner are reverse.compared with CK,XP improver and containing lime processing increase the soil pH amplitude is the highest, soil conditioner application could effectively relieve harmfulness of aluminum toxicity in acid soil, the activity of aluminum was decreased significantly.2. By analyzing the results of pot and field experiments, we find that applying soil amendment could obviously increase the peanut pod yield and nut quality of dry peanuts in the South, XP + organic manure, improved desulfurization ash agent, XP modifier have good results3. Comprehensive consideration on peanut production, plant nutrition, growth and development index and Analysis of Quality, the peanut yield can be greatlyincreased by application of XP modifier, 60-65kg / 667m2 as recommending dose4. The amount of active Al content in soils has a significant impact on root growth , the treatment with a high aluminum content, plant root is shorter, plants are also lower.pot and field experiments results show that application of acid soil improver which will help to ease the dangers of aluminum toxicity, but the type and amount of modifier different the effectiveness is different. The amount of active Al content in soils which treat by XP improver and containing lime processing has decreased significantly . in Pot red soil and lateritic red soil experiment, the treatment which containing lime the amount of active Al content was decreased by18.0%, 18.7% compared with CK, XP decreased 16.4%, 16.0%. XP processing decreased by 16.4%, 16.0%. in Wengyuan and huizhou field experiment, the amount of active Al content was decreased by34.3%, 35.1%, XP processing decreased by 27.4%, 27.4%. the changes of Activity of aluminum in soil and soil pH in synchronization, that is, with the reduction of soil pH, soil element active aluminum content graduallyincreased . the toxicity of aluminum increases too, There is a remarkable negative correlation between these two structures...