古尔班通古特沙漠南缘3种生活型草本植物生物量分配及相关生长关系

doi:10.7525/j.issn.1673-5102.2017.02.020

摘要/Abstract

摘要： 为了解古尔班通古特沙漠不同生活型草本植物的生物量分配特征，通过取样调查当地34种草本植物的生物量研究表明：（1）采集到的每个物种样本的总生物量大多小于4 g，其中多数个体（大于80%）的地上与地下生物量分别在2和0.5 g以内，根冠比主要集中在0.25以内；（2）类短命植物向地下部分分配较多生物量，根冠比较大，集中分布在1.67左右；短命和一年生长营养期草本向地下部分配的生物量远小于类短命植物，两者的根冠比较小，主要集中在0.15左右；（3）短命植物地下与地上部生物量间为等速生长关系，而类短命植物和一年生长营养期草本植物地下与地上生物量间为异速生长关系，其中类短命植物随个体增大向地下部分配生物量的比例增多，而一年生长营养期草本则相反。综上所述，短命、类短命和一年生长营养期草本植物地下与地上生物量间具有不同的分配特征，与各自独特的生活史特征相一致。

关键词: 古尔班通古特沙漠, 草本植物, 生活型, 生物量分配

Abstract: We took biomass survey samples on herbaceous plants along the southern margin Gurbantünggüt desert to study the biomass allocation features of herbaceous plants of different life-forms in Gurbantünggüt Desert. Results showed that:(1) most of the total biomass of the sampled 34 species of herbaceous plants was less than 4 g, most of whose above-ground biomass(AGB) and below-ground biomass(BGB) was less than 2 and 0.5 g, respectively, and their root-shoot ratios(R/S) were less than 0.25; (2) Ephemeroids allocated more biomass to below ground parts and had a higher R/S, which distributed around 1.67 intensively; Ephemerals and annuals allocated much less biomass to belowground parts, both of which has smaller R/S around 0.15; (3)The growth speed of the biomass of up-ground and below-ground parts of ephemeral parts was equal, but that of the ephemeroids was unequal. The proportion of the ephemeroids biomass allocated to the below-ground parts was increased complying with the individual's enlargement, while annuals biomass was on contrast. Therefore, the biomass of up-ground and below-ground parts of ephemeral, ephemeroids and annuals has different allocation features, which is consistent with the special plant life story features.

Key words: Gurbantünggüt Desert, herbaceous plants, life-form, biomass allocation

中图分类号:

S567.2

赵晶, 汪溪远. 古尔班通古特沙漠南缘3种生活型草本植物生物量分配及相关生长关系[J]. 植物研究, 2017, 37(2): 304-311.

ZHAO Jing, WANG Xi-Yuan. Allocation Patterns and Allometric Relationships between Above- and Below-ground Biomass of Three Life-form Herbaceous Plants in the Gurbantünggüt Desert[J]. Bulletin of Botanical Research, 2017, 37(2): 304-311.

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