本文關(guān)鍵詞： 生活型 類短命植物 生物量 異速生長指數(shù) 繁殖分配 準(zhǔn)噶爾荒漠　出處：《草業(yè)學(xué)報(bào)》2014年02期 　論文類型：期刊論文

【摘要】：類短命植物是我國荒漠植物區(qū)系中重要而獨(dú)特的組成部分。準(zhǔn)噶爾荒漠是類短命植物在中亞干旱區(qū)分布的最東端。目前關(guān)于類短命植物生物量分配及異速生長關(guān)系的研究較少。選擇了百合科的小山蒜、棱葉韭、粗柄獨(dú)尾草、黑鱗頂冰花、伊犁郁金香以及菊科的細(xì)葉鴉蔥共6種植物作為研究對(duì)象,對(duì)比研究了其生物量分配及異速生長關(guān)系的異同。結(jié)果表明,6種類短命植物單株總生物量在0.628~21.144g之間,根冠比在0.355~3.066之間,葉片生物量比例在0.092~0.289之間,繁殖分配比例在0.111~0.649之間。6種植物用于繁殖器官和光合器官的生物量分配各不相同,表明不同科、不同屬及同屬不同種之間的生物量大小及器官分配比例無一致規(guī)律。大部分物種根冠比隨個(gè)體增大而顯著下降,而繁殖分配則呈顯著的異速增加的趨勢(shì)。6種植物器官生物量間(共45對(duì))大部分(40對(duì))表現(xiàn)為等速生長關(guān)系(即異速生長指數(shù)為1),而且地上與地下生物量間及葉片與地下生物量間還各自具有共同的異速生長指數(shù)(分別為0.8764和0.8585),表現(xiàn)出強(qiáng)烈的功能趨同性。但6個(gè)物種間沒有出現(xiàn)完全一致的相關(guān)生長關(guān)系,這可能歸因于由系統(tǒng)分類地位決定的遺傳特性的差異。
[Abstract]:Short-lived plants are an important and unique part of the desert flora in China. Junggar Desert is the easternmost part of the distribution of short-lived plants in the arid region of Central Asia. Few studies have been carried out in the Liliaceae. Six species of plants, including leek, Cymbidium caudata, Ilystra tulip and Compositae, were used as the research objects. The results showed that the total biomass of 6 species of short-lived plants was between 0.628 and 21.144g, the ratio of root to shoot was between 0.355 and 3.066, and the ratio of leaf biomass was between 0.092 and 0.289. The proportion of reproductive distribution between 0.111 and 0.649 was between 0.111 and 0.649, indicating that the biomass distribution of reproductive organs and photosynthetic organs was different, indicating that the distribution of biomass was different in different families. The biomass size and organ allocation ratio of different genera and different species of the same genus were not consistent. The root-shoot ratio of most species decreased significantly with the increase of individuals. The reproductive allocation showed a trend of significant allometric increase. 6. The biomass of plant organs (45 pairs), most of 40 pairs, showed isokinetic growth relationship (I. e., the isokinetic growth index was 1%), and the relationship between aboveground and underground biomass and leaf. The isokinetic growth indices (0.8764 and 0.8585N, respectively) shared by the subsurface biomass showed strong functional convergence, but there was no complete correlation between the six species. This may be attributed to differences in genetic characteristics determined by the taxonomic status of the system.
【作者單位】： 中國科學(xué)院干旱區(qū)生物地理與生物資源重點(diǎn)實(shí)驗(yàn)室中國科學(xué)院新疆生態(tài)與地理研究所;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金項(xiàng)目(41201056) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2014CB954200)資助
【分類號(hào)】：Q948

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