吉林农业大学学报2024，Vol.46Issue(5)：901-910,10.DOI:10.13327/j.jjlau.2020.5883
吉林省西部苏打盐碱地不同开垦年限水田土壤剖面特征
Soil Profile Characteristics of Soda Saline-alkali Paddy Fields with Different Reclamation Years in Western Jilin Province
摘要
Abstract
Taking soda saline-alkali paddy fields with different reclamation years in western Jilin province as the research object,field investigation and indoor physical and chemical analysis meth-ods were used to analyze the morphological characteristics,basic physical and chemical properties and main nutrient characteristics of soil profiles at different levels of the newly reclaimed paddy fields,20-year paddy fields and 50-year paddy fields.The profiles were compared with those of unre-claimed degraded grasslands.The results showed that with the increase of rice cultivating years,soil pH,electrical conductivity,alkalinity and soluble salt content all decreased,while cation exchange capacity increased significantly.The alkaline layer of the soil gradually disappeared,forming a"ma-ture plow layer".The organic matter content and total P content of of soil at different levels were in-creasing.After 50 years of rice cultivation,the maximum values of soil organic matter content and to-tal P content both appeared on the surface of the soil,with an average annual increase of 2.64%and 3.05%,respectively.The total K content of the soil continued to increase in the upper part of the soil with the extension of the age,while the content below the P layer decreased first and then increased,with small overall variation.The content of soil available P was generally low,showing a trend of first decline and then a rise with the increase of the cultivation years.The total N content of the soil in-creased with the cultivation time,except for the surface layer of the soil,indicating that in a long-term dry and wet alternation environment,total nitrogen was prone to leaching downward with water.The content of soil alkaline N varied greatly,mainly increasing.The soil available K content had the largest change in the soil profile with the extension of years,and the upper part of the soil changed drastically during 20-50 years of reclamation.Soda saline-alkali soil increased soil nutrients after years of cultivating rice,especially on the plow bottom(P),artificially matured,and soil fertility has been continuously improved.关键词
苏打盐碱地/退化草原/开垦年限/水田/土壤养分/吉林省Key words
soda saline-alkali land/degraded grassland/years of reclamation/paddy field/soil nutrient/Jilin province分类
农业科技引用本文复制引用
徐雅婧,田俊杰,鄂宇迪,冯君..吉林省西部苏打盐碱地不同开垦年限水田土壤剖面特征[J].吉林农业大学学报,2024,46(5):901-910,10.基金项目
国家自然科学基金项目(41771250) （41771250）
