Species diversity and soil nutrient changes of a Nitraria tangutorum shrub community in Qingtu Lake wetland

doi:10.11686/cyxb2020353

Abstract

Abstract:

This paper results from a study of species diversity and soil nutrient variation in a Nitrariatangutorum shrub community in Qingtu Lake Wetland. It was found that： 1） There were 15 species in the community， belonging to 6 families and 15 genera， including 7 genera of Chenopodiaceae， 3 genera of Tribulaceae， 2 genera of Asclepiadaceae， and 1 genus each from the Poaceae， Solanaceae and Lauraceae. 2） The highest importance value for N. tangutorum was 54.72 in heavy saline-alkali soil. Importance values for saline sandy soil， yellow silty sandy soil， gray-white silty sandy soil， and semi-fixed sandy soil were， respectively 35.00， 31.16， 22.22， and 15.65. 3） For Margalef richness index and Shannon-Weiner diversity index， there were significant differences （P<0.05） between gray-white silty soil and other soils； for Simpson diversity index， community dominance index and Pielou evenness index， there were no significant differences between soil categories （P>0.05）； for Alatulo evenness index， there were significant differences （P<0.05）. 4） The highest soil organic matter content was in wetland area， with the greatest concentration at 10-20 cm depth， and the lowest at 40-60 cm depth； the highest content of total phosphorus was in the upper part of the shrub dune， with the highest concentration at 5-10 cm depth， and the lowest at 40-60 cm depth； the highest content of total nitrogen was at the land among dune with the highest N content at 0-5 cm depth， and the lowest at 20-40 cm depth； 5） The soil water content in waterlogged and non-waterlogged land （dunes） increased gradually with increasing soil depth， to a maximum below 40-60 cm soil depth. The water content of Nitraria shrub dunes was increased when growing in waterlogged areas， and settlement of fine sand on the soil surface in waterlogged areas enhanced. The groundwater level at the study site has steadily risen from approximately -4.1 m in 2006 to -3.0 m in 2019， fitting the regression equation： Water depth=-0.0017X²+0.1275X-4.274， where X denotes year （R²=0.9804； P<0.05）.

Key words: Qingtu Lake, Nitrariatangutorum shrub, species diversity, soil nutrients, soil moisture

Fu-gui HAN, Duo-qing MAN, Qing-zhong ZHENG, Yan-li ZHAO, Yu-nian ZHANG, Bin XIAO, Gui-quan FU, Juan DU. Species diversity and soil nutrient changes of a Nitraria tangutorum shrub community in Qingtu Lake wetland[J]. Acta Prataculturae Sinica, 2021, 30(1): 36-45.

Figures/Tables 6

References 34

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指标 Index	重度盐碱地Heavy saline-alkali land		半固定沙地 Semi-fixed sandy land		盐碱沙地 Saline-alkali sandy land		黄色粉砂地 Yellow silty ground		灰白色粉砂地 Off-white silty ground
指标 Index	物种 Species	重要值 Important value	物种 Species	重要值 Important value	物种 Species	重要值Important value	物种 Species	重要值Important value	物种 Species	重要值Important value
优势种 Dominant species	白刺 N. tangutorum	54.72	白刺 N. tangutorum	15.65	白刺 N. tangutorum	35.00	白刺 N. tangutorum	31.16	白刺 N. tangutorum	22.22
伴生种 Associated species	黑果枸杞 L. henicum	7.11	梭梭 H. ammodendron	6.27	黑果枸杞 L. henicum	3.63	黑果枸杞 L. henicum	7.72	黑果枸杞 L. henicum	8.20
	盐爪爪 K. foliatum.	19.58	沙蒿 A. arenaria	7.30	盐爪爪 K. foliatum.	6.46	梭梭 H. ammodendron	8.75	盐爪爪 K. foliatum.	5.62
	芦苇 P. australis	18.59	盐生草 H. glomeratus	4.72	骆驼蓬 P. nigellastrum	1.13	沙蒿 A. arenaria	5.07	驼蹄瓣 Z. macropodum	12.55
			猪毛菜 S. collina	4.69	鹅绒藤 C. chinense.	8.41	骆驼蓬 P. nigellastrum	6.85	猪毛菜 S. collina	11.52
			沙米 A. squarrosum	2.21	驼蹄瓣 Z. macropodum	3.04	驼蹄瓣 Z. macropodum	4.74	鹅绒藤 C. chinense.	19.71
			雾冰藜 B. dasyphylla	3.54	芦苇 P. australis	7.27	猪毛菜 S. collina	0.38	芦苇 P. australis	6.64
			蒙古虫实 C. mongolicum	3.96			沙蓝刺头 L. leontopodioides	3.07
			鹅绒藤 C. chinense.	2.92
			芦苇P. australis	7.17

指标 Index	重度盐碱地Heavy saline-alkali land		半固定沙地 Semi-fixed sandy land		盐碱沙地 Saline-alkali sandy land		黄色粉砂地 Yellow silty ground		灰白色粉砂地 Off-white silty ground
指标 Index	物种 Species	重要值 Important value	物种 Species	重要值 Important value	物种 Species	重要值Important value	物种 Species	重要值Important value	物种 Species	重要值Important value
优势种 Dominant species	白刺 N. tangutorum	54.72	白刺 N. tangutorum	15.65	白刺 N. tangutorum	35.00	白刺 N. tangutorum	31.16	白刺 N. tangutorum	22.22
伴生种 Associated species	黑果枸杞 L. henicum	7.11	梭梭 H. ammodendron	6.27	黑果枸杞 L. henicum	3.63	黑果枸杞 L. henicum	7.72	黑果枸杞 L. henicum	8.20
	盐爪爪 K. foliatum.	19.58	沙蒿 A. arenaria	7.30	盐爪爪 K. foliatum.	6.46	梭梭 H. ammodendron	8.75	盐爪爪 K. foliatum.	5.62
	芦苇 P. australis	18.59	盐生草 H. glomeratus	4.72	骆驼蓬 P. nigellastrum	1.13	沙蒿 A. arenaria	5.07	驼蹄瓣 Z. macropodum	12.55
			猪毛菜 S. collina	4.69	鹅绒藤 C. chinense.	8.41	骆驼蓬 P. nigellastrum	6.85	猪毛菜 S. collina	11.52
			沙米 A. squarrosum	2.21	驼蹄瓣 Z. macropodum	3.04	驼蹄瓣 Z. macropodum	4.74	鹅绒藤 C. chinense.	19.71
			雾冰藜 B. dasyphylla	3.54	芦苇 P. australis	7.27	猪毛菜 S. collina	0.38	芦苇 P. australis	6.64
			蒙古虫实 C. mongolicum	3.96			沙蓝刺头 L. leontopodioides	3.07
			鹅绒藤 C. chinense.	2.92
			芦苇P. australis	7.17

样地类型Sample type	Margalef丰富度指数Margalef richness index	Simpson多样性指数Simpson diversity index	Shanon-wiener多样性指数Shanon-wiener diversity index	群落优势度指数dominant index	Pielou均匀度指数 Pielou uniformity index	Alatulo均匀度指数 Alatulo uniformity index
重度盐碱地Heavy saline-alkali land	0.711±0.020b	0.596±0.044a	0.911±0.010b	0.742±0.086a	0.404±0.044a	1.037±0.206a
半固定沙地Semi-fixed sandy land	0.688±0.277b	0.434±0.192a	0.928±0.365b	0.483±0.206a	0.525±0.203a	0.651±0.164ab
盐碱沙地Saline-alkali sandy land	0.705±0.269b	0.362±0.213a	0.978±0.280b	0.742±0.139a	0.453±0.134a	0.858±0.113ab
黄色粉砂地Yellow silty ground	0.742±0.266b	0.392±0.128a	0.773±0.252b	0.525±0.057a	0.600±0.125a	0.609±0.054ab
灰白色粉砂地Off-white sitly ground	1.190±0.315a	0.490±0.173a	1.015±0.295a	0.633±0.182a	0.499±0.162a	0.567±0.083b

样地类型Sample type	Margalef丰富度指数Margalef richness index	Simpson多样性指数Simpson diversity index	Shanon-wiener多样性指数Shanon-wiener diversity index	群落优势度指数dominant index	Pielou均匀度指数 Pielou uniformity index	Alatulo均匀度指数 Alatulo uniformity index
重度盐碱地Heavy saline-alkali land	0.711±0.020b	0.596±0.044a	0.911±0.010b	0.742±0.086a	0.404±0.044a	1.037±0.206a
半固定沙地Semi-fixed sandy land	0.688±0.277b	0.434±0.192a	0.928±0.365b	0.483±0.206a	0.525±0.203a	0.651±0.164ab
盐碱沙地Saline-alkali sandy land	0.705±0.269b	0.362±0.213a	0.978±0.280b	0.742±0.139a	0.453±0.134a	0.858±0.113ab
黄色粉砂地Yellow silty ground	0.742±0.266b	0.392±0.128a	0.773±0.252b	0.525±0.057a	0.600±0.125a	0.609±0.054ab
灰白色粉砂地Off-white sitly ground	1.190±0.315a	0.490±0.173a	1.015±0.295a	0.633±0.182a	0.499±0.162a	0.567±0.083b

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