Effects of the Microhabitat Formed by Introduced Hippophae rhamnoides on Plant Community and Soil in Desert Land of Northwest Sichuan Province

doi:10.11924/j.issn.1000-6850.casb2020-0146

Abstract

Abstract:

Microhabitat is wildly used to restore deserted ecosystem, but little research has been done on microhabitat restoring alpine-cold desert land. The study set a research in the desert land of northwest Sichuan, Hippophae rhamnoides was introduced from Russia to build single plant and mass plants microhabitat to restore alpine desert. Vegetation types, biodiversity, soil bulk density, water content, pH, organic carbon, total nitrogen, total phosphate, micro biomass carbon, nitrogen and phosphate were studied after three years of formed microhabitats to analyze the effect of microhabitats on vegetation community and soil ecosystem. The results showed that microhabitats increased covers of brush and herb community, mass plants microhabitat enriched biodiversity of the herb community significantly and the amounts of ecological plants, and microhabitat did not change the dominate species of herb community. Microhabitat did not influence soil bulk density, pH and soil water content. Mass plants microhabitat increased soil organic to 5.55 g/kg, total nitrogen to 0.35 g/kg and total phosphate to 0.69 g/kg, and increased soil microbial biomass. However, the soil of alpine desert land was still barren and needed a long time to be restored. Thus, mass plants microhabitat formed by H. rhamnoides has a better function of restoring than single plant microhabitat, and could be used to restore alpine-cold desert land.

Key words: alpine-cold desert land, biodiversity, cover of vegetation community, soil nutrient, microbial biomass

CLC Number:

Du Yulong, Tu Weiguo, Vladimirov Dmitrii. Effects of the Microhabitat Formed by Introduced Hippophae rhamnoides on Plant Community and Soil in Desert Land of Northwest Sichuan Province[J]. Chinese Agricultural Science Bulletin, 2020, 36(31): 71-76.

Figures/Tables 4

References 26

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类型	样地特征	苗木	移栽方案	种植方式
对照	原始沙地,坡度小于5°, 植被盖度低,人为干扰较少	—	—	—
单株	原始沙地,坡度6°左右, 植被盖度低,封育	俄罗斯大果沙棘 ‘中秋红’2年繁育苗	客土移栽	单株种植,株间间隔1.5 m
团块	原始沙地,低于1 m隆起沙丘, 植被盖度低,封育,人为干扰较少	俄罗斯大果沙棘 ‘中秋红’2年繁育苗	客土移栽	纵横交错种植,单株间隔0.5 m,形成0.5 m×0.5 m方格, 最终形成带宽5 m、长10 m的种植带

类型	样地特征	苗木	移栽方案	种植方式
对照	原始沙地,坡度小于5°, 植被盖度低,人为干扰较少	—	—	—
单株	原始沙地,坡度6°左右, 植被盖度低,封育	俄罗斯大果沙棘 ‘中秋红’2年繁育苗	客土移栽	单株种植,株间间隔1.5 m
团块	原始沙地,低于1 m隆起沙丘, 植被盖度低,封育,人为干扰较少	俄罗斯大果沙棘 ‘中秋红’2年繁育苗	客土移栽	纵横交错种植,单株间隔0.5 m,形成0.5 m×0.5 m方格, 最终形成带宽5 m、长10 m的种植带

类型	俄罗斯大果沙棘盖度/%	草本盖度/%	生物结皮覆盖率/%	优势物种	常见物种
对照	—	5.32±1.54b	1.04±0.82b	赖草Leymus secalinus	以礼草Roegneria hirsuta,川西当归Angelica sinensis
单株	25.43±12.48a	10.34±5.71b	3.41±1.18ab	赖草Leymus secalinus	川西当归Angelica sinensis,以礼草Roegneria hirsuta, 尼泊尔酸模Rumex nepalensis
团块	55.29±29.31b	21.66±8.39a	6.21±3.97a	赖草Leymus secalinus	川甘亚菊Ajania potaninii,米口袋Gueldenstaedtia verna, 尼泊尔酸模Rumex nepalensis,菥蓂Thlaspi arvense, 沙蒿Artemisia desertorum,平车前Plantago depressa

类型	俄罗斯大果沙棘盖度/%	草本盖度/%	生物结皮覆盖率/%	优势物种	常见物种
对照	—	5.32±1.54b	1.04±0.82b	赖草Leymus secalinus	以礼草Roegneria hirsuta,川西当归Angelica sinensis
单株	25.43±12.48a	10.34±5.71b	3.41±1.18ab	赖草Leymus secalinus	川西当归Angelica sinensis,以礼草Roegneria hirsuta, 尼泊尔酸模Rumex nepalensis
团块	55.29±29.31b	21.66±8.39a	6.21±3.97a	赖草Leymus secalinus	川甘亚菊Ajania potaninii,米口袋Gueldenstaedtia verna, 尼泊尔酸模Rumex nepalensis,菥蓂Thlaspi arvense, 沙蒿Artemisia desertorum,平车前Plantago depressa

类型	丰富度指数	物种多样性指数	生态优势度指数	均匀度指数
对照	2.30±0.52b	0.71±0.34b	0.43±0.27b	0.30±0.12a
单株	4.23±1.36b	0.98±0.49b	0.62±0.44a	0.26±0.19ab
团块	7.85±3.32a	1.45±0.57a	0.82±0.5a	0.20±0.12b