|本期目录/Table of Contents|

 植物群落特征和稳定性对荒漠草原不同放牧强度模拟降水的响应(PDF)

《内蒙古大学学报(自然科学版)》[ISSN:1000-9035/CN:22-1262/O4]

期数:
2020年03期
页码:
297-306
栏目:
研究论文
出版日期:
2020-05-15

文章信息/Info

Title:
 Response of Plant Characteristics and Stability to Simulated Precipitation in Different Grazing Intensities of Desert Steppe
作者:
 王忠武1王悦骅1宝 音2王占文1宋晓辉1刘 晨1康 慧1韩国栋1
 1.内蒙古农业大学草原与资源环境学院,呼和浩特 010010; 2.内蒙古自治区农牧业科学院,呼和浩特 010031
Author(s):
 WANG Zhong-wu1WANG Yue-hua1BAO Yin2WANG Zhan-wen1SONG Xiao-hui1LIU Chen1KANG Hui1HANG Guo-dong1
 1.College of Grassland Resources and Environmental Science,Inner Mongolia Agricultural University,Hohhot 010010,China;
2.Inner Mongolia Academy of Agricultural and Animal Husbandry Science,Hohhot 010010,China
关键词:
 载畜率 降水 群落特征 稳定性
Keywords:
 stocking rate precipitation community characteristics stability
分类号:
-
DOI:
-
文献标识码:
A
摘要:
 为了探讨植物群落特征和稳定性在不同放牧强度对模拟降水的响应,本试验在短花针茅( Stipa breviflora )荒漠草原不同放牧处理下进行了围封和模拟降水。模拟降水试验依附在长期载畜率试验平台,长期载畜率试验平台有12个小区,分为3个区组,每个区组有4个处理,载畜率设置为:对照(CK)、低载畜率(LG)、中载畜率(MG)和高载畜率(HG),试验采用完全随机区组排列。模拟降水试验在每个载畜率小区设置了4个降水梯度进行围封,分别为减50%的降水(P1)、自然降水(P2)、增加50%降水(P3)和增加100%的降水(P4)。试验结果表明:(1)盖度在不同放牧强度下,均随着降水的增加而增加,在对照、低载畜率和高载畜率增加50%降水与增加100%降水的盖度没有显著差异( P <0.05),密度在低、中、高载畜率利用下增加降水也没有显著变化,而在对照区增加100%降水的密度显著高于自然降水( P <005),生物量在4种放牧强度下并没有随着降水的增加而增加,但随着降水的减少显著降低。(2)植物群落的物种数、香浓威纳指数没有随着降水的改变发生变化,而丰富度指数在中和高载畜率利用下增加100%降水显著高于自然降水( P <0.05)。(3)不同放牧强度减少50%降水群落处于稳定状态,而增加降水群落处于相对不稳定状态。
Abstract:
In order to investigate the response of plant community characteristics and stability to increasing precipitation in different recovery stages,this experiment was carried out under different grazing treatments in Stipa breviflora desert steppe with different simulated precipitation treatments.The simulated precipitation experiments were conducted on the long-term stocking rate test platform.This platform had 12 plots and were divided into 3 blocks,and each block had 4 treatments.The stocking rates were set as control (CK),Light grazing (LG),Moderate grazing (MG) and High grazing (HG),respectively.The experiment was conducted in a completely random arrangement on these blocks.In the simulated precipitation experiment,four precipitation gradients within enclose were set up in each stocking rate plot,which were 50% precipitation reduction (P1),natural precipitation (P2),50% precipitation increase (P3) and 100% precipitation increase (P4).The results were as follows.(1) The community coverage increased in different recovery stages with the increase of precipitation.But no significant differences were found between the increasing 50% precipitation treatment and the increasing 100% precipitation treatment in CK,LG and HG ( P <0.05).There was no significant change in the density of increasing precipitation in the light,moderate and heavy grazing treatment,but the density of 100% precipitation increase in the control was significantly higher than that of natural precipitation ( P <0.05).The biomass did not increase with the increase of precipitation under four grazing intensities,but decreases significantly with the decrease in precipitation.(2) The number of species in the plant community and the Shannon-Weiner index did not change with the change of precipitation in different grazing intensities,while the richness index was significantly higher in the 100% precipitation increase than that in the natural precipitation both in the moderate and high stocking rates ( P <0.05).(3) The community was stable under 50% precipitation reduction,but it was relatively unstable under the condition of increasing precipitation in different grazing intensities.

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备注/Memo

备注/Memo:
 收稿日期:2019-11-14; 修回日期:2020-04-10
基金项目:内蒙古自治区重大科技专项(zdzx2018020); 国家自然科学基金(31560140,31760143,31260124,31270502); 国家重点研发计划(2016YFC0500504); 中科院院士咨询项目; 内蒙古自治区草原英才项目; 内蒙古自然科学基金项目(2016MS0412); 教育部和农业部重点实验室; 内蒙古自治区草原管理创新团队
作者简介:王忠武 (1979-),男,内蒙古巴彦淖尔市五原县人,副教授,博士。研究方向为草地生态与管理。E-mail:zhongwuwang1979@163
通信作者:韩国栋(1964-),男,内蒙古托克托县人,教授,博士。E-mail:nmghanguodong@163.com
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