本文選題：刈割 + 典型草原�。� 參考：《生態(tài)環(huán)境學(xué)報(bào)》2017年05期

【摘要】：通過(guò)測(cè)定不同刈割時(shí)間處理(不刈割、8月1日刈割、8月16日刈割、8月31日刈割)下錫林郭勒盟典型草原大針茅(Stipa grandis)種群地上生物量和高度、密度、蓋度、分枝數(shù)、每枝葉片數(shù)等5種個(gè)體性狀以及大針茅種群粗蛋白含量、中性洗滌纖維、酸性洗滌纖維等營(yíng)養(yǎng)物質(zhì)含量之間的差異性及各項(xiàng)指標(biāo)之間的相關(guān)性,為探究不同的刈割時(shí)間對(duì)錫林郭勒盟典型草原建群植物大針茅種群特征的影響提供理論依據(jù),也為草地生態(tài)系統(tǒng)的合理利用提供技術(shù)支持。結(jié)果表明:不同時(shí)間刈割對(duì)典型草原大針茅種群特征有顯著的影響。與不刈割對(duì)照相比,8月16日刈割處理大針茅種群的密度和蓋度均達(dá)到最大值,分別為45.28%和16.64%;8月1日刈割處理大針茅種群的株高、分枝數(shù)、每枝葉片數(shù)等個(gè)體性狀,生物量及營(yíng)養(yǎng)物質(zhì)含量均達(dá)到最大值;大針茅種群的生物量與植株高度、分枝數(shù)之間存在極顯著的正相關(guān)關(guān)系(r~2=0.5130、P0.0001;r~2=0.9075、P0.0001),與蓋度之間存在顯著的正相關(guān)關(guān)系(r~2=0.3498、P0.05);大針茅的高度、分枝數(shù)、密度、蓋度之間具有相互影響的內(nèi)在關(guān)聯(lián)性(P0.05)。
[Abstract]:The aboveground biomass, density, coverage, branching number of Stipa grandisi population in typical grassland of Xilinguole League were measured under different cutting time treatments (no cutting, August 1 cutting, August 16 cutting, August 31 cutting). The differences of five individual traits such as the number of branches and leaves and the contents of crude protein, neutral detergent fiber and acid detergent fiber in Stipa grandis population, and the correlation among the indexes were analyzed. In order to explore the effect of different cutting time on the population characteristics of Stipa grandis, a typical grassland in Xilinguole League, it also provides technical support for the rational utilization of grassland ecosystem. The results showed that cutting at different times had a significant effect on the population characteristics of Stipa grandis in typical steppe. The density and coverage of Stipa grandis population reached the maximum on August 16 (45.28% and 16.64%, respectively), and the plant height, number of branches, number of leaves per branch, and other individual traits of cutting treatment on August 1. The biomass and nutrient content of Stipa grandis population reached the maximum, and there was a very significant positive correlation between biomass and plant height and branch number of Stipa grandis population. There was a significant positive correlation between the biomass of Stipa grandis 20.5130, P0.0001, P0.9075P0.0001, and the coverage of Stipa grandis 20.3498P0.05, the height, branching number of Stipa arundinacea, the number of branches, the number of branches of Stipa arundinacea, the number of branches, the number of branches, the number of branches, the number of branches, the number of branches, The interrelation between density and coverage is P0.05.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)草原與資源環(huán)境學(xué)院;
【基金】：內(nèi)蒙古溫性草原牧區(qū)“生產(chǎn)生態(tài)生活”優(yōu)化保障技術(shù)集成與示范項(xiàng)目(2012BAD13B02) 牧區(qū)優(yōu)質(zhì)高效飼草生產(chǎn)利用技術(shù)研究示范項(xiàng)目(201003023)
【分類(lèi)號(hào)】：S812

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