放牧强度对内蒙古典型草原群落结构和家畜生产性能的影响

doi:10.11733/j.issn.1007-0435.2023.03.026

草地学报 ›› 2023, Vol. 31 ›› Issue (3): 844-851.DOI: 10.11733/j.issn.1007-0435.2023.03.026

放牧强度对内蒙古典型草原群落结构和家畜生产性能的影响

李艳龙^1,2, 石椿珺^1,2, 王昊¹, 武麟¹, 王亚东¹, 冷爽¹, 张佳璐¹, 李可欣¹, 李永宏^1,2

1. 内蒙古大学生态与环境学院草地生态学重点实验室, 内蒙古呼和浩特 010021;
2. 蒙古高原生态学与资源利用教育部重点实验室, 内蒙古呼和浩特 010021

收稿日期:2022-10-06 修回日期:2022-11-10 出版日期:2023-03-15 发布日期:2023-04-01
通讯作者: 李永宏,E-mail:lifyhong@126.com
作者简介:李艳龙(1993-),男,满族,内蒙古乌兰察布人,博士研究生,主要从事草地生态学研究,E-mail:yanlong0624@126.com
基金资助:
内蒙古自治区科技计划项目“退化草原生态修复与草牧业可持续发展技术”和“智慧牧场管理技术”资助

Effects of Grazing Intensity on Community Structure and Livestock Productivity in A Typical Steppe of Inner Mongolia

LI Yan-long^1,2, SHI Chun-jun^1,2, WANG Hao¹, WU Lin¹, WANG Ya-dong¹, LENG Shuang¹, ZHANG Jia-lu¹, LI Ke-xin¹, LI Yong-hong^1,2

1. School of Ecology and Environment, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China;
2. Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Hohhot, Inner Mongolia 010021, China

Received:2022-10-06 Revised:2022-11-10 Online:2023-03-15 Published:2023-04-01

摘要/Abstract

摘要： 认识放牧对草地植物群落结构和家畜生产性能的影响是修复放牧退化草地和制定可持续放牧体系的理论基础。本研究在内蒙古锡林郭勒典型草原开展了基于草地放牧留茬高度的适应性放牧实验，连续4年监测了无牧（NG）、轻牧（LG）、中牧（MG）和重牧（HG）条件下草地植物群落的变化和家畜生产性能，分析其对放牧强度的响应。结果表明：与NG相比，HG显著降低了优势种的相对生物量，提高了伴生种的相对生物量（P <0.05）；LG和MG处理下主要提高了优势种的生产力，而在HG处理主要提高了伴生种的生产力；在所研究的典型草原采用适应性放牧方式下，中度放牧可获得最佳的草地植物生产和家畜生产性能。研究为制定合理的草原放牧制度、促进草地群落结构优化和草畜平衡发展提供了理论依据。

关键词: 放牧强度, 典型草原, 草地生产力, 采食量, 日增重

Abstract: Understanding the effects of grazing on plant community structure and livestock performance is a basis for restoring the degraded grassland and developing a sustainable grazing management. We conducted a grazing experiment in a typical steppe grassland in Xilingol region of Inner Mongolia, to investigate the response of steppe community structure and grazing animal performance to grazing intensities in an adaptive grazing management system. The experiment was a random block design with 4 grazing intensities, i.e., nil grazing (NG), light grazing (LG), moderate grazing (MG) and heavy grazing (HG), replicated by four times. The grassland was rotationally grazed three times in plant growing season each year, and each grazing stopped when grassland residual height was about 6 cm. We monitored the plant community composition and structure, and the feeding behavior and bodyweight gain of grazing sheep over a 4-year experimental period (2017 to 2020). The results showed that:Compared with NG, HG significantly decreased the relative biomass of dominant species but increased that of subordinate species in community (P<0.05);Grazing enhanced the grassland community productivity, and the enhancement was mainly a consequence of the productivity increase of dominant species under LG and MG, but of subordinate species under HG;In the adaptive management system, the designed MG has the best grassland structure and animal production performance. Our study provides the theoretical basis for formulating rational grazing system, promoting a balanced development with both grassland community structure and livestock production considered.

Key words: Grazing intensity, Typical steppe, Grassland productivity, Daily feed intake, Liveweight gain

中图分类号:

S821.4+3

李艳龙, 石椿珺, 王昊, 武麟, 王亚东, 冷爽, 张佳璐, 李可欣, 李永宏. 放牧强度对内蒙古典型草原群落结构和家畜生产性能的影响[J]. 草地学报, 2023, 31(3): 844-851.

LI Yan-long, SHI Chun-jun, WANG Hao, WU Lin, WANG Ya-dong, LENG Shuang, ZHANG Jia-lu, LI Ke-xin, LI Yong-hong. Effects of Grazing Intensity on Community Structure and Livestock Productivity in A Typical Steppe of Inner Mongolia[J]. Acta Agrestia Sinica, 2023, 31(3): 844-851.

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放牧强度对内蒙古典型草原群落结构和家畜生产性能的影响

Effects of Grazing Intensity on Community Structure and Livestock Productivity in A Typical Steppe of Inner Mongolia

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