首页|放牧强度对宁夏盐池荒漠草地土壤与植被恢复的影响

放牧强度对宁夏盐池荒漠草地土壤与植被恢复的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
以宁夏盐池县荒漠草原为研究对象，设置3个放牧强度:围栏封育(NG，no grazing)、中度放牧(MG，moderate grazing)、重度放牧(HG，heavy grazing)，运用主成分分析与路径分析对草地质量进行综合评价，比较不同放牧条件下草地植被和土壤理化性质的差异，以期为退化草地生态系统恢复与重建提供理论指导。结果表明:NG处理下草地植被生物量较MG和HG处理分别提高10。78％和74。85％，植被高度与盖度显著提高31。21％～131。27％和26。03％～93。29％。NG处理的土壤机械稳性团聚体以粒径＞0。25 mm的大团聚体为主，HG处理以＜0。25 mm的微团聚体为主，不同放牧处理的土壤水稳性团聚体粒径＞0。25 mm的大团聚体占比、表层土壤水稳性团聚体的平均质量直径和几何平均直径大小依次为:NG＞MG＞HG;NG处理下的土壤供肥潜力、土壤供肥强度和土壤综合质量显著高于HG。综上所述，围栏封育下的草场植被、土壤结构和肥力恢复效果更好，对土壤的综合质量有明显的改善作用，是适合的草地生态恢复措施。
Effects of grazing intensity on soil and vegetation restoration of desert grassland in Yanchi,Ningxia
We comprehensively evaluated the quality of a desert grassland in Yanchi County under three grazing in-tensities,including fence enclosure(NG,i.e.no grazing),moderate grazing(MG,moderate grazing),and heavy grazing(HG,heavy grazing).Using principal component analysis and path analysis,we compared the differences in grassland vegetation and soil physicochemical properties under different grazing intensities,aiming to provide the-oretical guidance for the restoration and reconstruction of degraded grassland ecosystems.The results showed that plant biomass under NG treatment was 10.78％and 74.85％higher than MG and HG treatments,respectively,and plant height and coverage increased by 31.21％-131.27％and 26.03％-93.29％,respectively.Macroaggregates with a particle size＞0.25 mm were the main soil mechanical stable aggregates under NG,and microaggregates with a particle size＜0.25 mm dominated under HG.The proportion of soil water stable aggregates with a particle size＞0.25 mm,the average mass diameter and geometric mean diameter of surface soil water stable aggregates under different grazing treatments were in the order of NG＞MG＞HG.Soil nutrient supply potential,soil nutrient supply intensity,and soil comprehensive quality under NG treatment were significantly higher than those under HG treat-ment.We concluded that enclosure is a suitable measure for ecological restoration of grasslands,due to its positive effects on grassland vegetation,soil structure,and soil fertility.

desert grasslandsoil aggregatesoil fertilitybiomass

贾继宝、代惠萍、刘恒青、田超、孙权、魏树和、LIDIA Skuza

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宁夏大学农学院,银川 750021

陕西理工大学生物科学与工程学院,陕西汉中 723001

唐山市自然资源和规划局,河北唐山 063000

中国科学院沈阳应用生态研究所污染生态与环境工程重点实验室,沈阳 110016

波兰什切青大学分子生物学和生物技术中心生物学研究所,什切青71-415

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荒漠草原 土壤团聚体 土壤肥力 生物量

秦巴生物资源与生态环境国培重点实验室开放课题秦巴生物修复与资源开发研究创新引智基地陕西省市校共建项目国家高端外国专家项目国家高端外国专家项目陕西省创新能力支持计划陕西省一流团队

SLGPT2019KF04-022022-ZC-GXYZ-0029SXJ-2101G2023041029LDL2023041006L2023WGZJ-YB-052022-94

2024

10.13292/j.1000-4890.202407.039

生态学杂志
中国生态学学会

生态学杂志

CSTPCD北大核心
影响因子：1.439
ISSN：1000-4890
年,卷(期)：2024.43(7)