摘要
通过搜集2010~2020年发表的有关江西土壤酸化的文献资料,系统总结了江西耕地(水田和旱地)、园地(茶园和柑橘园)及林地的土壤pH值、酸化面积及酸化程度,明确了江西典型土地利用方式下的土壤酸化现状及酸化原因。与第二次土壤普查数据相比,江西耕地土壤pH均值下降了0.53个单位,水田和旱地土壤pH均值分别下降了0.60和0.40个单位,其中酸性强酸性(pH<5.5)土壤面积占84.89%;茶园土壤pH值的变化范围为3.00~6.95,均值为4.58,其中pH<4.5的茶园土壤面积占55.8%,且茶园表层(0~20 cm)土壤的pH值低于下层(20~40 cm);柑橘园土壤pH值的变化范围为3.41~7.65,均值为4.66,比对照地下降了0.48个单位,其中pH<4.5的强酸性土壤面积占45.7%,以40~60 cm土层酸化最为严重;林地土壤的pH均值下降了0.1~0.5个单位。江西省内耕地和园地的酸化主要由不合理施用化学氮肥造成的,而林地的酸化主要归因于大气氮、硫沉降和林木收获带走盐基离子。
Firstly,the articles which had been published about soil acidification in Jiangxi province from 2010 to 2020 were collected in the paper.Then,the soil pH,acidification area and degree of cultivated land(paddy field and upland),garden land(tea garden and orange garden)and forest land were summarized.At last,the soil acidification status and causes under typical land use mode in Jiangxi Province were clarified.The results showed that compared with the second nationwide general soil survey,the pH of cultivated soil decreased by 0.53 units,and that of paddy soil and upland decreased by 0.6 and 0.4 units,respectively.The area of acid and strong acid soil(pH<5.5)was 84.89%.The pH of typical tea garden soil varied from 3.00 to 6.95,the average pH was 4.58.The area of acid tea garden soil with pH<4.5 accounted for 55.8%,and the pH of surface layer tea garden soil(0~20 cm)was lower than that of the lower layer(20~40 cm).The range of soil pH change in orange garden was from 3.41 to 7.65,with an average value of 4.66,which was 0.48 pH units lower than the control.The strong acid soil area with pH<4.5 was 45.7%,and the soil layer of 40~60 cm seriously acidified.The soil pH in forest land decreased 0.1~0.5 units.The acidification of cultivated land and garden land in Jiangxi Province was mainly caused by unreasonable application of nitrogen fertilizer,while the acidification of forest land was mainly due to the deposition of atmospheric nitrogen,sulfur and the removal of base ions by tree harvest.
作者
姜冠杰
何小林
刘敏
张嵚
谢军
张小玲
黄琳翔
梁丰
JIANG Guan-jie;HE Xiao-lin;LIU Min;ZHANG Qin;XIE Jun;ZHANG Xiao-ling;HUANG Lin-xiang;LIANG Feng(College of Land Resources and Environment,Jiangxi Agricultural University,Nanchang 330045,China;Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province,Jiangxi Agricultural University,Nanchang 330045,China;Soil Fertilizer Technology Extension Station of Jiangxi Province,Nanchang,330046;Fengcheng Agricultural Technology Extension Center,Fengcheng 331100,China;Tonggu County Agriculture and Rural Bureau,Tonggu 336200,China)
出处
《江西农业学报》
CAS
2021年第5期46-55,共10页
Acta Agriculturae Jiangxi
基金
江西省科技厅青年基金项目(20161BAB213081)
国家重点研发项目(2018YFD0301100)
江西省教育厅青年基金项目(GJJ150396)
江西省教育厅科技计划项目(GJJ180196)。
关键词
江西
土地利用方式
土壤
酸化
PH值
Jiangxi Province
Land use mode
Soil
Acidification
pH
