Effects of Single-household and Multi-household Management on Soil Physicochemical Properties and Plant Diversity in Alpine Meadow

doi:10.7525/j.issn.1673-5102.2023.02.011

Abstract

Abstract:

Grassland biodiversity played an important role in grassland ecosystem stability. In order to reveal the influence mechanism of soil physical and chemical properties on plant diversity of different management methods in grassland， and clarify the changes of species diversity and functional diversity， and the sample plots in the single-household management pasture（SMP） and multi-household management pasture（MMP） of plant community in Alpine Meadow of Gannan were surveyed respectively. The results indicated that：（1）The Margalef index， Simpson index， and Shannon-Winener index of the plant communities under MMP were significantly higher than those under SMP， while the Pielou index was not significantly different under different grazing management methods. （2）Under different management methods， the soil water content， the soil total nitrogen and the soil total phosphorus under MMP were significantly higher than those under SMP（P<0.05） respectively； the soil conductivity and soil pH under SMP were higher than those under MMP； with the deepening of soil layer， the soil water content， the soil total phosphorus， the soil total nitrogen， the soil organic carbon， and the soil conductivity were higher respectively， however the soil pH had no significant difference in the different soil layer. （3）The functional richness， functional evenness index， and functional dispersion under MMP were higher than those under SMP respectively， and the difference between SMP and MMP were significant（P<0.05）. （4）The correlation analysis showed that： the plant species diversity and functional diversity were significantly positively correlated with the soil water content， the soil total nitrogen， and the soil phosphorus， the soil conductivity and soil pH were significantly negatively correlated with plant species diversity and functional diversity. The redundancy analysis showed that： the effect of soil physicochemical properties on plant diversity was more significant under MMP， and the correlation between soil physicochemical properties and plant diversity were higher at the 0-10 cm soil layer. The soil total nitrogen and the soil organic carbon were significant influencing factors of plant diversity under SMP and the soil total nitrogen and the soil total phosphorus were significant influencing factors of plant diversity under MMP.

Key words: functional diversity, management method, soil physical and chemical properties, species diversity

CLC Number:

Q938.1+3

Fengling YIN, Minxia LIU, Cheng LIU, Mingxing WANG, Ke XI. Effects of Single-household and Multi-household Management on Soil Physicochemical Properties and Plant Diversity in Alpine Meadow[J]. Bulletin of Botanical Research, 2023, 43(2): 261-271.

Figures/Tables 8

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土层 Layers /cm	参数 Parameters	条件影响 Conductional effect	多元相关比率 Multivariate correlation ration /%	F	P
0<h≤10	土壤全氮The soil total nitrogen	0.743	74.28	34.57	0.002
	土壤有机碳The soil organic carbon	0.078	7.76	3.42	0.072
	土壤含水量The soil water content	0.054	5.35	2.79	0.594
	土壤pH The soil pH	0.032	3.24	1.32	0.305
	土壤全磷The soil total phosphorus	0.011	1.12	2.13	0.204
	土壤电导率The soil conductivity	0.001	0.14	0.54	0.612
	总计 Total		91.89
10<h≤20	土壤有机碳The soil organic carbon	0.654	65.39	33.85	0.003
	土壤全氮The soil total nitrogen	0.166	16.57	1.78	0.274
	土壤全磷The soil total phosphorus	0.042	4.19	0.04	0.483
	土壤含水量The soil water content	0.032	3.24	2.73	0.691
	土壤pH The soil pH	0.013	1.26	0.21	0.502
	土壤电导率The soil conductivity	0.001	0.09	0.19	0.394
	总计 Total		90.74

土层 Layers /cm	参数 Parameters	条件影响 Conductional effect	多元相关比率 Multivariate correlation ration /%	F	P
0<h≤10	土壤全氮The soil total nitrogen	0.644	74.38	28.47	0.002
	土壤全磷The soil total phosphorus	0.091	9.13	5.46	0.405
	土壤含水量The soil water content	0.075	7.54	1.39	0.723
	土壤电导率The soil conductivity	0.040	4.03	2.31	0.574
	土壤有机碳The soil organic carbon	0.004	0.37	0.35	0.391
	土壤pH The soil pH	0.001	0.14	0.21	0.185
	总计 Total		95.59
10<h≤20	土壤全磷The soil total phosphorus	0.623	72.25	24.24	0.002
	土壤全氮The soil total nitrogen	0.115	10.47	6.39	0.242
	土壤有机碳The soil organic carbon	0.063	6.25	3.58	0.164
	土壤含水量The soil water content	0.015	1.49	1.94	0.197
	土壤pH The soil pH	0.012	1.17	2.78	0.325
	土壤电导率The soil conductivity	0.007	0.68	1.47	0.574
	总计 Total		92.31

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