宁夏大罗山4种主要植被类型的细根生物量

应用生态学报

宁夏大罗山4种主要植被类型的细根生物量

苏纪帅¹,程积民^1,2**,高阳¹,仇智虎³,曹怀清³

(¹西北农林科技大学动物科技学院, 陕西杨凌 712100; ^2中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100; ³宁夏罗山国家级自然保护区管理处, 宁夏红寺堡 751900)

出版日期:2013-03-18 发布日期:2013-03-18

Fine root biomass of four main vegetation types in Daluo Mountain of Ningxia, Northwest China.

SU Ji-shuai¹, CHENG Ji-min^1,2, GAO Yang¹, QIU Zhi-hu³, CAO Huai-qing³

(¹College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, China; ^2State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences/Ministry of Water Resources, Yangling 712100, Shaanxi, China; ^3Administration of Luo Mountain National Natural Reserve, Hongsipu 751900, Ningxia, China)

Online:2013-03-18 Published:2013-03-18

摘要/Abstract

摘要：

采用根钻法,分析了宁夏大罗山4种主要植被类型(青海云杉纯林、油松纯林、落叶灌木和荒漠草原)0～40 cm土层的细根生物量、土壤含水量和土壤容重,并对50 a、70 a和100 a 3种树龄的青海云杉纯林细根生物量进行了研究.结果表明: 4种植被类型的细根生物量集中分布在0～20 cm土层,大小顺序为油松纯林>青海云杉纯林>落叶灌木>荒漠草原,其中油松纯林显著高于其他3种植被类型;不同树龄青海云杉纯林细根生物量表现为70 a > 100 a > 50 a,且其活细根和死细根生物量分配比例无显著性差异;4种植被类型下0～40 cm土壤含水量的大小表现为:青海云杉纯林>油松纯林>落叶灌木>荒漠草原;土壤容重则呈相反的规律,并与细根生物量呈极显著负相关.

Abstract: By the method of soil core sampling, this paper studied the fine root biomass, soil water content, and soil bulk density in 0-40 cm soil layer of four main vegetation types (Picea crassifolia forest, Pinus tabulaeformis forest, deciduous shrubs, and desert grassland) in Daluo Mountain of Ningxia, and the fine root biomass in the 0-40 cm soil layer of P. crassifolia forests with the ages of 50-, 70-, and 100 a. The fine root biomass of the four vegetation types was mainly distributed in 0-20 cm soil layer, with the rank of P. tabulaeformis forest > P. crassifolia forest > deciduous shrubs > desert grassland, and the fine root biomass of P. tabulaeformis forest was significantly higher than that of the other three vegetation types. The fine root biomass of the P. crassifolia forests with different ages was 70 a > 100 a > 50 a, and there were no significant differences in the live fine root biomass ratio and dead fine root biomass ratio among the three P. crassifolia forests. The soil water content in the 0-40 cm soil layer of the four vegetation types was P. crassifolia forest > P. tabulaeformis forest > deciduous shrubs > desert grassland, while the soil bulk density followed an opposite pattern, and was significantly negatively correlated with the fine root biomass.

苏纪帅1,程积民1,2**,高阳1,仇智虎3,曹怀清3. 宁夏大罗山4种主要植被类型的细根生物量[J]. 应用生态学报.

SU Ji-shuai1, CHENG Ji-min1,2, GAO Yang1, QIU Zhi-hu3, CAO Huai-qing3. Fine root biomass of four main vegetation types in Daluo Mountain of Ningxia, Northwest China.[J]. Chinese Journal of Applied Ecology.