共和盆地不同灌木群落生物土壤结皮理化性质差异

doi:10.13866/j.azr.2023.11.09

Abstract

Abstract:

Exploring the differences in the physical and chemical properties of biological soil crusts (BSCs) in different shrub communities in the Gonghe Basin of Qinghai Province to provide theoretical reference for the protection and rational utilization of BSCs resources. The BSCs at different stages of Artemisia desertorum, Caragana microphylla, Salix cheilophila communities in the Gonghe Basin were investigated. Particle composition and nutrient characteristics were studied through field sampling and indoor analysis. The results showed that the particle composition of BSCs in the three shrub communities was dominated by sand (45%-90%). The sand content of Caragana microphylla>Salix cheilophila>Artemisia desertorum was significantly higher than that of bare sand between shrubs. The contents of total nitrogen, total carbon, organic matter, available phosphorus, available potassium, alkali-hydrolyzable nitrogen, total phosphorus in the BSCs of the Salix cheilophila community were significantly higher than other, and the contents increased with the development of BSCs in the three shrub communities. The shrub community mostly influenced the physical and chemical properties of BSCs, and the shrub biomass was significantly positively correlated with the coverage, thickness, total nitrogen, total carbon, organic matter, available phosphorus, available potassium, available nitrogen, and total phosphorus of BSCs, and significantly negatively correlated with sand content (P<0.05). The shrub community effectively improved the soil structure of BSCs in the sandy land of the Gonghe Basin. The Artemisia desertorum community was more conducive to soil refinement, and the Salix cheilophila community was more conducive to nutrient accumulation.

Key words: biological soil crusts, shrub communities, differences in physicochemical properties, Gonghe Basin

ZHANG Manyu, WANG Zhitao, DENG Lei, ZHOU Hong. Differences in the physical and chemical properties of biological soil crusts in different shrub communities in the Gonghe Basin[J].Arid Zone Research, 2023, 40(11): 1797-1805.

Figures/Tables 6

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References 34

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灌木群落	发育阶段	结皮盖度/%	结皮厚度/mm
沙蒿群落	微生物结皮	18.81±2.18	3.26±2.08
	藻结皮	38.17±5.64	10.25±2.57
	藓类结皮	48.73±2.41	13.76±1.24
小叶锦鸡儿群落	微生物结皮	20.68±1.31	2.09±0.50
	藻结皮	29.27±6.19	5.48±0.50
	藓类结皮	43.38±2.13	13.23±0.43
乌柳群落	微生物结皮	70.46±16.73	4.88±0.82
	藻结皮	67.85±10.33	10.55±1.19
	藓类结皮	87.65±3.58	14.46±0.51

指标	全氮					全碳				硝态氮						铵态氮				有机质
指标	df	F		P		df		F	P	df		F		P		df	F	P		df		F		P
发育阶段	2	9.643		0.003		2		12.463	0.001	2		192.749		0.000		2	47.320	0.000		2		58.023		0.000
灌木群落	2	699.593		0.000		2		77.066	0.000	2		164.313		0.000		2	74.968	0.000		2		319.277		0.000
发育阶段×灌木群落	4	1.543		0.254		4		3.626	0.037	4		140.458		0.000		4	3.930	0.029		4		6.086		0.007
指标	有效磷					速效钾				碱解氮						pH				全磷
指标	df	F		P		df		F	P	df		F		P		df	F	P		df		F		P
发育阶段	2	0.328		0.727		2		62.607	0.000	2		57.115		0.000		2	54.936	0.000		2		26.616		0.000
灌木群落	2	35.939		0.000		2		35.234	0.000	2		176.004		0.000		2	15.950	0.004		2		52.190		0.000
发育阶段×灌木群落	4	0.364		0.830		4		4.615	0.017	4		7.350		0.003		4	3.769	0.033		4		6.142		0.006
指标	全钾						沙粒						粉粒						黏粒
指标	df		F		P		df		F		P		df		F		P		df		F		P
发育阶段	2		16.604		0.000		2		49.630		0.000		2		31.473		0.000		2		70.790		0.000
灌木群落	2		37.358		0.000		2		83.092		0.000		2		69.703		0.000		2		53.274		0.000
发育阶段×灌木群落	4		13.732		0.000		4		11.867		0.000		4		8.628		0.002		4		30.980		0.000

	沙粒	全氮	全碳	有机质	有效磷	速效钾	碱解氮	全磷	结皮盖度	结皮厚度	灌木生物量
沙粒	1.000
全氮	-0.691^**	1.000
全碳	-0.823^**	0.942^**	1.000
有机质	-0.657^**	0.982^**	0.929^**	1.000
有效磷	-0.636^**	0.795^**	0.823^**	0.800^**	1.000
速效钾	-0.724^**	0.943^**	0.937^**	0.939^**	0.754^**	1.000
碱解氮	-0.635^**	0.936^**	0.891^**	0.947^**	0.748^**	0.933^**	1.000
全磷	-0.800^**	0.956^**	0.961^**	0.929^**	0.761^**	0.931^**	0.888^**	1.000
结皮盖度	-0.659^**	0.981^**	0.928^**	0.998^**	0.799^**	0.939^**	0.940^**	0.927^**	1.000
结皮厚度	-0.619^**	0.695^**	0.682^**	0.722^**	0.401^*	0.671^**	0.633^**	0.673^**	0.713^**	1.000
灌木生物量	-0.679^**	0.792^**	0.768^**	0.772^**	0.868^**	0.679^**	0.684^**	0.742^**	0.776^**	0.443^*	1.000

Differences in the physical and chemical properties of biological soil crusts in different shrub communities in the Gonghe Basin

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