本文關(guān)鍵詞：四種一年生荒漠植物構(gòu)件形態(tài)與生物量間的異速生長關(guān)系，由筆耕文化傳播整理發(fā)布。

四種一年生荒漠植物構(gòu)件形態(tài)與生物量間的異速生長關(guān)系

Allometric relationship between modular morphology and biomass of four annuals in the Gurbantunggut Desert, China.

[1] [2] [3]

XIE Ran , TAO Ye , CHANG Shun-li （ 1.Key Laboratory of Oasis Ecology, College of Resource and Environmental Science, Xinjiang University, Urumqi 830046, China; 2Key Laborator

[1]新疆大學(xué)資源與環(huán)境科學(xué)學(xué)院綠洲生態(tài)教育部重點實驗室,烏魯木齊830046; [2]中國科學(xué)院新疆生態(tài)與地理研究所、中國科學(xué)院干旱區(qū)生物地理與生物資源重點實驗室,烏魯木齊830011

文章摘要：1年生草本植物是古爾班通古特沙漠夏秋季節(jié)草本層片的主要組成部分。選擇4種藜科1年生草本植物（刺沙蓬、沙蓬、角果藜和對節(jié)刺）作為研究對象,對比分析了各物種構(gòu)件形態(tài)特征、生物量分配以及它們之間的異速生長關(guān)系。結(jié)果表明：沙蓬個體最大,其次為刺沙蓬,角果藜和對節(jié)刺個體最小;對節(jié)刺具有最大的根冠比（R/S）,其次是刺沙蓬,沙蓬和角果藜R/S最小。4種植物構(gòu)件形態(tài)與生物量間均呈顯著正相關(guān),表現(xiàn)出強烈的協(xié)同變化趨勢。R/S與絕大部分指標(biāo)間呈顯著負(fù)相關(guān),表明隨個體增大地下生物量分配比例逐漸減小。4種植物各構(gòu)件形態(tài)、地上及地下生物量間大部分呈指數(shù)〈1.0的異速生長關(guān)系,但各物種間的異速生長指數(shù)絕大部分無顯著差異且具有共同的異速生長指數(shù)。研究表明：盡管物種不同、個體大小迥異,但4種1年生植物構(gòu)件特征間多具有相同的生長速率和協(xié)同變化特征,體現(xiàn)了1年生植物這一生活型內(nèi)的不同物種對干旱荒漠環(huán)境的趨同適應(yīng)。

Abstr：Annuals are an important component of herbaceous layer in summer and autumn in the Gurbantunggut Desert, China. In this study, four annuals （Salsola ruthenica Iljin, AgriophyUum squarrosum L. Moq., Ceratocarpus arenarius L., and Horaninowia ulicina Fisch. et Mey. ） in Chenopodiaceae were chosen as targets, and the modular morphology, biomass allocation and their allometric relationships were comparatively analyzed. The results indicated that A. sqttarro- sum had the biggest body size （volume and biomass）, followed by S. ruthenica, and C. arenarius and S. pycnophylla were the smallest. S. pycnophylla had the highest ratio of root to shoot biomass （R/S）, followed by S. ruthenica, and A. squarrosum and C. arenarius were the lowest. There were significant positive correlations between modular morphology and biomass, indicating a strong tendency of collaborative change. R/S showed negative correlations between most morpho- logical variables and biomass, indicating that the allocation ratio of belowground biomass de- creased gradually with the increase of plant size. Most of the modular morphology and biomass in- dices represented significant allometric relationships with the scaling exponent 〈1.0, but most of the allometric scaling exponents among the four annuals were not different and these species all had the common scaling exponent each. This result revealed that although the plant sizes of the four species varied, the four annuals had the same growth ratio and collaborative change charac-teristics among these modular morphology and biomass indices, reflecting the convergent adapta- tion of different species in the life-form ＇annuals＇ to arid deserts.

文章關(guān)鍵詞：

Keyword：:annuals biomass a11ometric relationship root to shoot biomass ratio desert.

課題項目：國家自然科學(xué)基金項目（41201056）資助.

  本文關(guān)鍵詞：四種一年生荒漠植物構(gòu)件形態(tài)與生物量間的異速生長關(guān)系，由筆耕文化傳播整理發(fā)布。