Effects of Mowing Height on Community Composition and Species Niche in Stipa grandis Steppe

doi:10.16258/j.cnki.1674-5906.2021.07.007

Ecology and Environment ›› 2021, Vol. 30 ›› Issue (7): 1386-1392.DOI: 10.16258/j.cnki.1674-5906.2021.07.007

• Research Articles • Previous Articles Next Articles

Effects of Mowing Height on Community Composition and Species Niche in Stipa grandis Steppe

LI Ya’nan(), ZHANG Feng, ZHAO Tianqi, ZHENG Jiahua, SUN Yu, ZHANG Bin^*(), ZHAO Mengli^*()

College of Grassland, Resource and Environment, Inner Mongolia Agricultural University, Key Laboratory of grassland resources (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010019, China

Received:2021-02-22 Online:2021-07-18 Published:2021-10-09
Contact: ZHANG Bin,ZHAO Mengli

刈割留茬高度对大针茅草原群落组成及物种生态位的影响

李雅男(), 张峰, 赵天启, 郑佳华, 孙宇, 张彬^*(), 赵萌莉^*()

内蒙古农业大学草原与资源环境学院/草地资源教育部重点实验室,内蒙古呼和浩特 010019

通讯作者: 张彬,赵萌莉
作者简介:李雅男（1997年生）,硕士研究生,主要从事草地生态学方向研究。E-mail: 1446848320@qq.com
基金资助:
放牧地健康管理(2020CG0050);内蒙古自治区自然科学基金项目(2020ZD03);内蒙古自治区科技计划项目(2019ZD008);国家自然科学基金项目(31861143001)

Abstract

Abstract:

Mowing is one of the main ways to use grassland and is essential for sustainable grassland utilization. Our experiment was conducted to investigate the species composition and species ecological niche of the plant community of Stipa grandis steppe in response to different stubble heights. This experiment was conducted in the S. grandis steppe of Xilingol, Inner Mongolia, China, sampled at the peak biomass in August 2020. We set enclosure (CK) as the control and different mowing stubble heights (2, 5 and 8 cm of stubble heights, respectively) for a total of four treatments. We determined the height, cover, density and biomass of all species occurring in the community, and analyzed the importance values and ecological niche width and overlap of the species in the community. The result shows that there are 6 families, 11 genera and 13 species of plants in this community, with S. grandis, Cleistogenes squarrosa, Leymus chinensis and Anemarrhena asphodeloides as the dominat species. Compared with enclosure, the 8 cm stubble height treatment reduced the importance values of the four dominant species. Secondly, among the four dominant species, the ecological niche width of the three different stubble heights treatments were the largest for A. asphodeloides and the smallest for S. grandis. The number of species pairs with overlapping ecological niches under both the 8 cm and 2 cm stubble treatments was greater than the control, and the number of species pairs with overlapping ecological niches under the 5 cm stubble treatment was not significantly different from the control. The aligns of the species of the ecological bit overlap occurred in the total number of species and the control. With the increase of mowing stubble height, the pairs of species with ecological niche overlap between 0.9?1 decreased, and the number of species pairs between 0?0.3 increased.

Key words: Stipa grandis steppe, mowing height, important values, niche breadth, niche overlap

摘要：

刈割是草原主要利用方式之一,对草地可持续利用具有重要的意义。为研究大针茅草原植物群落的物种组成及物种生态位对不同刈割留茬高度的响应,在内蒙古锡林郭勒盟毛登牧场大针茅典型草原,以围封不刈割（CK）为对照,设置不同刈割留茬高度（分别为留茬2、5、8 cm）处理,于2020年8月生物量高峰期进行野外取样,测定群落中所有出现物种的高度、盖度、密度及生物量,并分析了群落中物种的重要值及生态位宽度和重叠度。结果表明,草地群落中共出现6科11属13种植物,不同处理下群落优势物种均为大针茅、糙隐子草、羊草和知母。留茬8 cm处理降低了4个优势物种的重要值。其次,4个优势物种中,3种不同留茬高度处理下知母的生态位宽度最大,大针茅的生态位宽度最小。留茬8 cm和留茬2 cm处理时发生生态位重叠的物种对数均多于对照,留茬5 cm处理时发生生态位重叠的物种对数与对照最相近。随着留茬高度的增加,生态位重叠值在0.9—1之间的物种对数减少,在0—0.3之间的物种对数增加。

关键词: 大针茅草原, 刈割留茬高度, 重要值, 生态位宽度, 生态位重叠

CLC Number:

S812.29
X17

LI Ya’nan, ZHANG Feng, ZHAO Tianqi, ZHENG Jiahua, SUN Yu, ZHANG Bin, ZHAO Mengli. Effects of Mowing Height on Community Composition and Species Niche in Stipa grandis Steppe[J]. Ecology and Environment, 2021, 30(7): 1386-1392.

李雅男, 张峰, 赵天启, 郑佳华, 孙宇, 张彬, 赵萌莉. 刈割留茬高度对大针茅草原群落组成及物种生态位的影响[J]. 生态环境学报, 2021, 30(7): 1386-1392.

Figures/Tables 4

References 36

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编号 No.	科 Family	属 Genus	物种 Species	重要值 Important value
编号 No.	科 Family	属 Genus	物种 Species	CK	T₈	T₅	T₂
1	禾本科 Poaceae	针茅属 Stipa	大针茅 Stipa grandis	0.39	0.38	0.36	0.38
2	禾本科 Poaceae	隐子草属 Cleistogenes	糙隐子草Cleistogenes squarrosa	0.11	0.08	0.13	0.12
3	禾本科 Poaceae	冰草属 Agropyron	冰草 Agropyron cristatum	0.04	0.02	0	0.04
4	禾本科 Poaceae	赖草属 Leymus	羊草 Leymus chinensis	0.18	0.08	0.23	0.11
5	百合科 Liliaceae	知母属 Anemarrhena	知母Anemarrhena asphodeloides	0.41	0.23	0.30	0.24
6	百合科 Liliaceae	葱属 Allium	细叶葱Allium tenuissimum	0.01	0	0	0.02
7	百合科 Liliaceae	葱属 Allium	双齿葱 A. bidentatum	0.03	0.06	0.06	0.04
8	百合科 Liliaceae	葱属 Allium	野韭 A. ramosum	0	0	0	0.01
9	莎草科 Cyperaceae	苔草属 Carex	黄囊苔草 Carex korshinskyi	0.01	0	0.02	0.01
10	旋花科 Convolvulaceae	旋花属 Convolvulus	银灰璇花 Convolvulus ammannnii	0	0.03	0.01	0.01
11	藜科 Chenopodiaceae	藜属 Chenopodium	刺穗藜 Chenopodium aristatum	0.01	0.13	0.10	0.11
12	藜科 Chenopodiaceae	猪毛菜属 Salsola	猪毛菜 Salsola collina	0	0.12	0.09	0.07
13	菊科 Asteraceae	蒿属 Artemisia	冷蒿 Artemisia frigida	0.04	0	0	0

编号 No.	科 Family	属 Genus	物种 Species	重要值 Important value
编号 No.	科 Family	属 Genus	物种 Species	CK	T₈	T₅	T₂
1	禾本科 Poaceae	针茅属 Stipa	大针茅 Stipa grandis	0.39	0.38	0.36	0.38
2	禾本科 Poaceae	隐子草属 Cleistogenes	糙隐子草Cleistogenes squarrosa	0.11	0.08	0.13	0.12
3	禾本科 Poaceae	冰草属 Agropyron	冰草 Agropyron cristatum	0.04	0.02	0	0.04
4	禾本科 Poaceae	赖草属 Leymus	羊草 Leymus chinensis	0.18	0.08	0.23	0.11
5	百合科 Liliaceae	知母属 Anemarrhena	知母Anemarrhena asphodeloides	0.41	0.23	0.30	0.24
6	百合科 Liliaceae	葱属 Allium	细叶葱Allium tenuissimum	0.01	0	0	0.02
7	百合科 Liliaceae	葱属 Allium	双齿葱 A. bidentatum	0.03	0.06	0.06	0.04
8	百合科 Liliaceae	葱属 Allium	野韭 A. ramosum	0	0	0	0.01
9	莎草科 Cyperaceae	苔草属 Carex	黄囊苔草 Carex korshinskyi	0.01	0	0.02	0.01
10	旋花科 Convolvulaceae	旋花属 Convolvulus	银灰璇花 Convolvulus ammannnii	0	0.03	0.01	0.01
11	藜科 Chenopodiaceae	藜属 Chenopodium	刺穗藜 Chenopodium aristatum	0.01	0.13	0.10	0.11
12	藜科 Chenopodiaceae	猪毛菜属 Salsola	猪毛菜 Salsola collina	0	0.12	0.09	0.07
13	菊科 Asteraceae	蒿属 Artemisia	冷蒿 Artemisia frigida	0.04	0	0	0

编号 No.	物种 Species	生态位宽度Niche Breadths
编号 No.	物种 Species	CK	T8	T5	T2
1	大针茅 Stipa grandis	0.38	0.29	0.26	0.37
2	糙隐子草Cleistogenes squarrosa	0.58	0.50	0.63	0.61
3	冰草 Agropyron cristatum	0.35	0.20	0	0.36
4	羊草 Leymus chinensis	0.68	0.50	0.63	0.58
5	知母Anemarrhena asphodeloides	0.62	0.71	0.73	0.68
6	细叶葱Allium tenuissimum	0.11	0	0	0.18
7	双齿葱A. bidentatum	0.22	0.41	0.35	0.33
8	野韭 A. ramosum	0	0	0	0.13
9	黄囊苔草Carex korshinskyi	0.13	0	0.21	0.14
10	银灰璇花 Convolvulus ammannnii	0	0.28	0.13	0.09
11	刺穗藜 Chenopodium aristatum	0.16	0.62	0.56	0.56
12	猪毛菜 Salsola collina	0	0.62	0.55	0.49
13	冷蒿 Artemisia frigida	0.30	0	0.05	0

编号 No.	物种 Species	生态位宽度Niche Breadths
编号 No.	物种 Species	CK	T8	T5	T2
1	大针茅 Stipa grandis	0.38	0.29	0.26	0.37
2	糙隐子草Cleistogenes squarrosa	0.58	0.50	0.63	0.61
3	冰草 Agropyron cristatum	0.35	0.20	0	0.36
4	羊草 Leymus chinensis	0.68	0.50	0.63	0.58
5	知母Anemarrhena asphodeloides	0.62	0.71	0.73	0.68
6	细叶葱Allium tenuissimum	0.11	0	0	0.18
7	双齿葱A. bidentatum	0.22	0.41	0.35	0.33
8	野韭 A. ramosum	0	0	0	0.13
9	黄囊苔草Carex korshinskyi	0.13	0	0.21	0.14
10	银灰璇花 Convolvulus ammannnii	0	0.28	0.13	0.09
11	刺穗藜 Chenopodium aristatum	0.16	0.62	0.56	0.56
12	猪毛菜 Salsola collina	0	0.62	0.55	0.49
13	冷蒿 Artemisia frigida	0.30	0	0.05	0

Effects of Mowing Height on Community Composition and Species Niche in Stipa grandis Steppe

刈割留茬高度对大针茅草原群落组成及物种生态位的影响

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