中国草地学报2026，Vol.48Issue(5)：68-80,13.DOI:10.16742/j.zgcdxb.20250389
灌枝覆盖与羊粪添加对荒漠草原土壤养分及优势牧草生长的影响
Effects of Shrub Branch Mulching and Sheep Manure Addition on Soil Nutrients and Dominant Forage Growth in Desert Steppe
摘要
Abstract
Shrub branch mulching and sheep manure addition have shown potential in degraded grass-land restoration practices for improving soil moisture and nutrient availability,respectively.However,the mechanisms and effects of these two measures,whether individually or combined,on soil water and nutri-ent regulation and dominant forage growth in desert steppe remain unclear.Therefore,a two-factor split-plot experiment was conducted in the desert steppe of Yanchi,Ningxia.The main plots consisted of three levels of Caragana korshinskii branch mulch treatments:no mulch,short-branch mulch(5-10 cm),and long-branch mulch(70-130 cm).The subplots included four sheep manure addition levels of 0 kg/hm2,4 000 kg/hm2,8 000 kg/hm2,and 16 000 kg/hm2.Their effects on soil moisture,temperature,nutrients,and dominant forage growth were investigated.The results showed that:(1)Compared with no branch mulch,both short-branch mulch and long-branch mulch reduced soil temperature and increased soil water content,whereas sheep manure addition had no significant effect on soil moisture or temperature;(2)Both branch mulch and sheep manure addition significantly decreased soil pH and increased the contents of soil organic carbon,nitrogen,and phosphorus;(3)Branch mulch and sheep manure addition significantly pro-moted the growth of dominant forages.All growth indices of Agropyron mongolicum were highest under the short-branch mulch and 8 000 kg/hm2 sheep manure addition treatment,while Lespedeza potaninii per-formed best under the long-branch mulch and 8 000 kg/hm2 sheep manure addition treatment;(4)Redun-dancy analysis indicated that soil water content,temperature,and nutrients were key environmental factors influencing forage growth,with particularly pronounced effects on Agropyron mongolicum.In summary,branch mulch mainly improved soil hydrothermal conditions,whereas sheep manure addition primarily enhanced soil nutrient supply.Their combination effectively promoted the growth of dominant forages in desert steppe,providing a scientific basis for grassland ecological restoration and sustainable management.关键词
灌枝覆盖/羊粪添加/荒漠草原/土壤养分/优势牧草Key words
Shrub branch mulch/Sheep manure addition/Desert steppe/Soil nutrients/Dominant forage grasses分类
农业科技引用本文复制引用
刘冬娅,赵香君,闫永刚,刘静,李志刚..灌枝覆盖与羊粪添加对荒漠草原土壤养分及优势牧草生长的影响[J].中国草地学报,2026,48(5):68-80,13.基金项目
宁夏重点研发项目(2026BEG02047) （2026BEG02047）
宁夏科技惠民项目(2025CMG03050) （2025CMG03050）
