现代农业研究2026，Vol.32Issue(2)：50-55,6.
宁南退耕 18 龄紫花苜蓿草地土壤水分特征变化
Changes in Soil Moisture Characteristics of an 18-year-old Alfalfa Grassland Following Cropland Conversion in Southern Ningxia
摘要
Abstract
To investigate the dynamics of soil moisture and its response to precipitation in restored grassland following cropland retirement in southern Ningxia,this study systematically analyzed the temporal variation,vertical distribution characteristics,and precipitation response of soil water content in the 0～200 cm soil layer using an 18-year-old alfalfa('gannong no.3 alfalfa')grassland in Wangwa Town,Pengyang County as the research object.The results showed that from May to August 2020,the soil water content in the 0～200 cm layer of the alfalfa grassland exhibited a continuous decreasing trend,ranging from 7.14％to 17.18％.The surface soil layer(0～30 cm)experienced the most pronounced fluctuations,with the 10 cm layer varying between 3.19％and 21.37％.Precipitation significantly influenced soil mois-ture in the 0～30 cm surface layer.Both soil water content and storage in the 0～200 cm profile displayed a"multi-peak W-shaped"vertical pattern,and soil water content increased significantly with increasing precipitation.This study provides a scientific basis for optimizing vegetation allocation and soil water management in restored grasslands in southern Ningxia.关键词
紫花苜蓿/土壤水分/降雨响应/黄土丘陵区Key words
Alfalfa/soil moisture/rainfall response/loess hilly area分类
农业科技引用本文复制引用
侯嘉娜,吕雯,禹彩凤..宁南退耕 18 龄紫花苜蓿草地土壤水分特征变化[J].现代农业研究,2026,32(2):50-55,6.基金项目
国家自然科学基金(项目编号:32260422) （项目编号:32260422）
