Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert

doi:10.7522/j.issn.1000-694X.2021.00123

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (1): 96-107.DOI: 10.7522/j.issn.1000-694X.2021.00123

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Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert

Huanhuan Meng¹^,²(), Yuanyuan Zhang¹^,², Xiaobing Zhou², Benfeng Yin², Duoqi Zhou¹, Ye Tao²()

^1.College of Life Sciences / Anhui Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui，Anqing Normal University，Anqing 246133，Anhui，China
^2.State Key Laboratory of Desert and Oasis Ecology，Xinjiang Institute of Ecology and Geography，Chinese Academy of Sciences，Urumqi 830011，China

Received:2021-06-24 Revised:2021-10-08 Online:2022-01-20 Published:2022-01-28
Contact: Ye Tao

Abstract

Abstract:

Herbaceous plant layer are the main contributors to early spring productivity in the Gurbantunggut Desert. In order to understand the overall adaptability of desert herbaceous plants to the desert environment at community level， the herbaceous plant layer in the 1 hm²large plot in the middle of the desert was analyzed. The relationship between aboveground and belowground biomass distribution， and the relationship between herbaceous plant layer biomass and root-shoot ratio， species richness and plant density were verified. The results showed as follows：（1） The ephemeral plant Carex physodes was the dominant species with a density of 137.68 （plant·m^-2）， a relative density of 72.16%， a relative frequency of 39.29%. The aboveground biomass accounted for nearly 50% of the total biomass， while the belowground biomass accounted for 99%. （2） The root-to-shoot ratio of herbaceous plants at the community level was individual size-dependent. （3） There was no significant allometric growth relationship between the aboveground and belowground biomass of herbaceous plants， and the above-ground biomass had a significant density-constraining relationship. There was a linear positive correlation between root-shoot ratio and plant density. The relationship between species richness and belowground biomass and total biomass was an inverted U-shaped relationship， while the relationship between aboveground biomass and abundance was a unimodal relationship. （4） After removing the ephemeral plant C. physodes in the community， the herbaceous plants had a constant growth relationship between the aboveground and belowground biomass. The belowground biomass had a significant density-constraining relationship， and the root-to-shoot ratio and plant density were significantly negative correlation， and there was a significant unimodal relationship between species richness and biomass. The results of the study clarified the biomass distribution relationship and internal laws of desert herbaceous plants at the community/layer level.

Key words: desert, herbaceous plants, biomass allocation, allometric relationship, root to shoot ratio

CLC Number:

Q948

Huanhuan Meng, Yuanyuan Zhang, Xiaobing Zhou, Benfeng Yin, Duoqi Zhou, Ye Tao. Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert[J]. Journal of Desert Research, 2022, 42(1): 96-107.

Figures/Tables 8

References 67

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物种	密度/(株·m^-2)	频度	相对密度/%	相对频度/%
囊果苔草（Carex physodes）	137.68	99	72.16	39.29
尖喙牻牛儿苗（Erodium oxyrhinchum）	31.20	73	16.35	28.97
琉苞菊（Hyalea pulchella）	0.56	4	0.29	1.59
刺沙蓬（Salsola ruthenica）	0.72	13	0.38	5.16
齿稃草（Schismus arabicus）	10.44	14	5.47	5.56
旱麦草（Eremopyrum triticeum）	4.24	9	2.22	3.57
角果藜（Ceratocarpus arenarius）	3.84	20	2.01	7.94
黑鳞顶冰花（Gagea nigra）	0.04	1	0.02	0.40
疏齿千里光（Senecio subdentatus）	0.04	1	0.02	0.40
土大戟（Euphorbia turczaninowii）	0.08	2	0.04	0.79
对节刺（Horaninowia ulicina）	0.56	5	0.29	1.98
弯果葫芦巴（Trigonella ammophilus）	0.08	2	0.04	0.79
假狼紫草（Nonea caspica）	0.28	4	0.15	1.59
条叶庭荠（Alyssum linifolium）	0.68	4	0.36	1.59
沙蓬（Agriophyllum squarrosum）	0.36	1	0.19	0.40
总体	190.8	252	100	100

物种	密度/(株·m^-2)	频度	相对密度/%	相对频度/%
囊果苔草（Carex physodes）	137.68	99	72.16	39.29
尖喙牻牛儿苗（Erodium oxyrhinchum）	31.20	73	16.35	28.97
琉苞菊（Hyalea pulchella）	0.56	4	0.29	1.59
刺沙蓬（Salsola ruthenica）	0.72	13	0.38	5.16
齿稃草（Schismus arabicus）	10.44	14	5.47	5.56
旱麦草（Eremopyrum triticeum）	4.24	9	2.22	3.57
角果藜（Ceratocarpus arenarius）	3.84	20	2.01	7.94
黑鳞顶冰花（Gagea nigra）	0.04	1	0.02	0.40
疏齿千里光（Senecio subdentatus）	0.04	1	0.02	0.40
土大戟（Euphorbia turczaninowii）	0.08	2	0.04	0.79
对节刺（Horaninowia ulicina）	0.56	5	0.29	1.98
弯果葫芦巴（Trigonella ammophilus）	0.08	2	0.04	0.79
假狼紫草（Nonea caspica）	0.28	4	0.15	1.59
条叶庭荠（Alyssum linifolium）	0.68	4	0.36	1.59
沙蓬（Agriophyllum squarrosum）	0.36	1	0.19	0.40
总体	190.8	252	100	100

指标	参数	全部物种	除去囊果苔草	囊果苔草
地上生物量/(g·m^-2)	生物量范围	0.690—17.616	0—17.058	0.135—11.243
地上生物量/(g·m^-2)	均值±标准误	5.599±0.268	2.316±0.305	3.283±0.212
地下生物量/(g·m^-2)	生物量范围	1.147—129.820	0—2.048	1.414—129.820
地下生物量/(g·m^-2)	均值±标准误	42.687±2.936	0.316±0.039	42.371±2.955
总生物量/(g·m^-2)	生物量范围	2.958—140.283	0—19.106	1.550—140.283
	均值±标准误	48.286±2.976	2.632±0.341	45.654±3.135
根冠比	范围	0.165—34.436	0—0.476	4.420—34.436
根冠比	均值±标准误	8.799±0.623	0.162±0.009	12.883±0.567

指标	参数	全部物种	除去囊果苔草	囊果苔草
地上生物量/(g·m^-2)	生物量范围	0.690—17.616	0—17.058	0.135—11.243
地上生物量/(g·m^-2)	均值±标准误	5.599±0.268	2.316±0.305	3.283±0.212
地下生物量/(g·m^-2)	生物量范围	1.147—129.820	0—2.048	1.414—129.820
地下生物量/(g·m^-2)	均值±标准误	42.687±2.936	0.316±0.039	42.371±2.955
总生物量/(g·m^-2)	生物量范围	2.958—140.283	0—19.106	1.550—140.283
	均值±标准误	48.286±2.976	2.632±0.341	45.654±3.135
根冠比	范围	0.165—34.436	0—0.476	4.420—34.436
根冠比	均值±标准误	8.799±0.623	0.162±0.009	12.883±0.567

数据类型	相关生长指数				等速生长检验
数据类型	R²	P	α	95%CI	F	P	类型
全部物种	0.011	0.296	—	—	—	—	—
去除囊果苔草	0.855	<0.001	0.9232	0.845—1.009	3.219	0.077	等速关系
囊果苔草	0.841	<0.001	1.151	1.062—1.247	12.123	0.001	异速关系

Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert

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