img

官方微信

  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
高级检索
中国地理学会沙漠分会2012年学术研讨会论文选

沙质草地放牧和封育下物种丰富度和生物量关系的季节变化

  • 左小安 ,
  • 赵学勇 ,
  • 张铜会 ,
  • 王少昆 ,
  • 罗亚勇 ,
  • 周 欣
展开
  • 中国科学院寒区旱区环境与工程研究所 奈曼沙漠化研究站, 甘肃 兰州 730000

收稿日期: 2012-11-17

  修回日期: 2012-12-21

  网络出版日期: 2012-12-21

Seasonal Changes of the Relationship between Species Richness and Community Biomass in Grassland under Grazing and Exclosure in Horqin Sandy Land, Northern China

  • ZUO Xiao-an ,
  • ZHAO Xue-yong ,
  • ZHANG Tong-hui ,
  • WANG Shao-kun ,
  • LUO Ya-yong ,
  • ZHOU Xin
Expand
  • Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou 730000, China

Received date: 2012-11-17

  Revised date: 2012-12-21

  Online published: 2012-12-21

摘要

研究了科尔沁沙质草地放牧和封育下植被盖度、密度、丰富度与地上生物量关系的季节变化。结果表明:放牧和封育草地4月的植被盖度、丰富度和生物量均低于生长旺季8月,而4月植物密度要高于8月;封育草地生长季盖度高于放牧草地,6月和8月生物量高于放牧草地, 4月和6月植物密度则低于放牧草地。封育草地8月物种丰富度与生物量呈极显著的负线性关系(p<0.01);放牧草地植物密度与生物量4月表现出极显著的正线性关系(p<0.01)、8月为极显著的负线性关系(p<0.01)。放牧草地优势植物糙隐子草4月的密度和生物量呈极显著的正线性关系(p<0.01)、8月为极显著的负线性关系(p<0.01);黄蒿和狗尾草8月的密度和生物量均呈极显著的负线性关系(p<0.01);猪毛菜4月和6月的密度和生物量呈极显著的正线性关系(p<0.01)。封育草地达乌里胡枝子、猪毛菜8月的植物密度和生物量呈极显著的正线性关系(p<0.01)。持续放牧和季节变化及其二者的交互作用对植被盖度、密度和生物量均有重要的影响(p<0.05);放牧通过影响草地生长季中的优势植物密度变化和生物量积累,引起了草地植物密度和生物量关系的季节变化,也导致生长季物种丰富度和生物量无显著关系;封育草地植物的竞争导致了物种丰富度和生物量关系的季节变化。

本文引用格式

左小安 , 赵学勇 , 张铜会 , 王少昆 , 罗亚勇 , 周 欣 . 沙质草地放牧和封育下物种丰富度和生物量关系的季节变化[J]. 中国沙漠, 2013 , 33(2) : 501 -507 . DOI: 10.7522/j.issn.1000-694X.2013.00068

Abstract

This study carried out an analysis of seasonal changes in relationships between vegetation cover, plant density, species richness and above-ground biomass in grassland under grazing and exclosure in Horqin Sandy Land. Results showed that in grassland being grazed and fenced, vegetation cover, richness and biomass were lower in April than those in August, while plant density showed a reverse trend. Vegetation cover over the season was higher in fenced grassland than that in grazed grassland; biomass in June and August was higher in fenced grassland than that in grazed grassland, while plant density in April and June and was lower in fenced grassland than that in grazed grassland. In fenced grassland, the relationship between species richness and biomass was significantly negative in August (p<0.01); in grazed grassland, the relationship between plant density and biomass was significantly positive in the April (p<0.01) and was significantly negative in August (p<0.01). The relationship between plant density and total biomass for dominant species varied with seasonal changes under grazing and exclosure. In grassland under grazing, the relationship between plant density of Cleistogenes squarrosa and biomass was significantly positive in April (p<0.01) and was significantly negative in August (p<0.01); the relationship between plant density of Artemisia scoparia or Setaria viridis and biomass was significantly negative in August (p<0.01); the relationship between plant density of Salsola collina and biomass was significantly positive in April and June (p<0.01). In fenced grassland, the relationship between plant density of Lesredeza davurica or Salsola collina and biomass was significantly positive in August (p<0.01). These results suggest that long-term grazing, seasonal changes and their interaction significantly influence vegetation cover, plant density and biomass in grassland (p<0.05). Long-term grazing also affects the seasonal changes of plant density and biomass of dominant species, which further affects the seasonal relationship between plant density and biomass in grassland. Species competition in fenced grassland results in the seasonal changes of relationship between species richness and biomass.

参考文献

[1]Bai Y F,Wu J G,Pan Q M,et al.Positive linear relationship between productivity and diversity:evidence from the Eurasian Steppe[J].Journal of Applied Ecology,2007,44:1023-1034.

[2]Kahmen A,Perner J,Audorff V,et al.Effects of plant diversity,community composition and environmental parameters on productivity in montane European grasslands[J].Oecologia,2005,142:606-615.

[3]Ma W H,He J S,Yang Y H,et al.Environmental factors covary with plant diversity-productivity relationships among Chinese grassland sites[J].Global Ecology and Biogeography,2010,19:233-243.

[4]Prtel M,Zobel K,Laanisto L,et al.The productivity-diversity relationship:varying aims and approaches[J].Ecology,2010,91:2565-2567.

[5]Tilman D,Wedin D,Knops J.Productivity and sustainability influenced by biodiversity in grassland ecosystems[J].Nature,1996,379:718-720.

[6]Zuo X A,Zhao X Y,Zhao H L,et al.Spatial heterogeneity of soil properties and vegetation-soil relationships following vegetation restoration of mobile dunes in Horqin Sandy Land,Northern China[J].Plant and Soil,2009,318:153-167.

[7]左小安,赵学勇,赵哈林,等.科尔沁沙质草地群落物种多样性和生产力格局与土壤特性的关系[J].环境科学,2007,28(5):18-24.

[8]郭轶瑞,赵哈林,赵学勇,等.科尔沁沙质草地物种多样性与生产力关系的研究[J].干旱区研究,2007,24(2):198-203.

[9]杨利民,周广胜,李建东.松嫩平原草地群落物种多样性与生产力关系的研究[J].植物生态学报,2002,26(5):589-593.

[10]赵哈林,赵学勇,张铜会,等.放牧胁迫下沙质草地植被的受损过程[J].生态学报,2003,23(8):1505-1511.

[11]刘建军,浦野忠朗,鞠子茂,等.放牧对草原生态系统地下生产力及生物量的影响[J].西北植物学报,2005,25(1):88-93.

[12]闫瑞瑞,卫智军,辛晓平,等.放牧制度对荒漠草原可萌发土壤种子库的影响[J].中国沙漠,2011,31(3):703-708.

[13]尚占环,姚爱兴,龙瑞军.干旱区山地植物群落物种多样性与生产力关系分析[J].干旱区研究,2005,22(1):74-78.

[14]杜国桢,覃光莲,李自珍,等.高寒草甸植物群落中物种丰富度与生产力的关系研究[J].植物生态学报,2003,27(1):125-132.

[15]何玉惠,赵哈林,刘新平,等.沙地恢复过程中两种一年生植物种子萌发和幼苗种群动态研究[J].中国沙漠,2010,30(6):1331-1335.

[16]罗亚勇,赵学勇,左小安,等.放牧与封育对沙质草地植被特征及其空间变异性的影响[J].干旱区研究,2008,28(1):118-124.

[17]李永宏,汪诗平.草原植物对家畜放牧的营养繁殖对策初探[C]//草原生态系统研究(第5集).北京:科学出版社,1997:23-31.

[18]Guo Q F,Berry W L.Species richness and biomass:Dissection of the hump shaped relationships[J].Ecology,1998,79:2555-2559.

[19]Chase J M,Leibold M A.Spatial scale dictates the productivity biodiversity relationship[J].Nature,2002,416:427-430.

[20]Bischoff A,Auge H,Mahn E.Seasonal changes in the relationship between plant species richness and community biomass in early succession[J].Basic and Applied Ecology,2005,6:385-394.

[21]马银山,张世挺.植物从个体到群落水平对放牧的响应[J].生态学杂志,2009,28(1):113-121.

文章导航

/