Analysis of soil acidification causes,resistance control techniques and improvement strategies
A comparative analysis was conducted between agricultural soil survey data from the 1980s and over 20 000 soil pH samples from the soil testing and formula fertilization project(2010s)in the study area.The trends in soil pH variation,causes of soil acidification,primary control technologies,and appropriate soil improvement measures were explored.The results showed that the average value of soil pH in the study area showed a decreasing trend from 1980s to 2010s,the proportion of neutral soil decreased by 13.1%,the proportion of acidic soil increased by 14.4%,and the proportion of soil area decreased by 1 unit of soil pH accounted for 24.48%.The analysis showed that the accelerated soil acidification was caused by many factors such as the application of soil parent material and chemical fertilizer,land use mode,acid rain,and the reduction of the application amount of alkaline substances such as plant ash.Based on the causes of soil acidification,the current technology of soil acidification resistance and control was discussed,including alkaline neutralization technology,organic fertilizer replacing fertilizer technology,agricultural engineering measures to reduce and control stains,and green fertilizer+biological fertilizer improvement technology.The soil improvement measures suitable for the actual situation of the study area were put forward,including adding alkaline substances such as lime,organic ash and residue and increasing organic fertilizer.
soil acidificationsoil testing and formula fertilizationresistance control technologysoil improvement
NETL
NSTL
万方数据
