發(fā)布時(shí)間：2018-05-21 05:40

  本文選題：典型草原 + 群落生產(chǎn)力　； 參考：《內(nèi)蒙古大學(xué)》2015年碩士論文

【摘要】：2013-2014年,基于草地適應(yīng)性利用理念,于內(nèi)蒙古錫林郭勒盟西烏珠穆沁旗,在牧戶尺度下,以生長(zhǎng)季,不同起始放牧?xí)r間牧后牧草留茬高度為9±1 cm為終牧?xí)r間節(jié)點(diǎn)的輪牧利用中,研究了季節(jié)尺度不同放牧?xí)r期對(duì)內(nèi)蒙古典型草原區(qū)群落生產(chǎn)力及土壤有機(jī)質(zhì)含量的影響。得出以下結(jié)論：1.以群落凈初級(jí)生產(chǎn)力及羊群采食量為指標(biāo),則2區(qū)(6月、8月放牧)群落地上凈生產(chǎn)力與采食量顯著高于其它小區(qū),說(shuō)明這種輪牧?xí)r間的搭配為較好的牧草資源利用方式。2.就草地利用率而言,2013、2014兩年草地利用率為都以4區(qū)最高、其次為2區(qū),均在55%以上。3.不同再生長(zhǎng)期內(nèi)群落增長(zhǎng)速率以2區(qū)(放牧間期主要為7月)最高。此外,4個(gè)小區(qū)再生長(zhǎng)期群落增長(zhǎng)速率均為正值,能夠補(bǔ)償?shù)谝淮屋喣林醒蛉簩?duì)牧草的啃食量。就2014年研究而言,整個(gè)放牧季不同時(shí)期的輪牧利用對(duì)典型草原植物群落表現(xiàn)為等補(bǔ)償生長(zhǎng)。4.各個(gè)小區(qū)根系生物量均隨著土層的加深逐漸減少,且地下根系主要集中在0-20cm土層,表現(xiàn)出表層化的趨勢(shì)。1區(qū)地下根系生物量顯著低于其他小區(qū),而其他不同處理間沒(méi)有顯著差異。5.各處理地下生物量垂直變化各異,可大致分為兩類：淺層增加深層減少型(1、3小區(qū))及淺層減少深層增加型(2、4小區(qū))。6.土壤有機(jī)質(zhì)含量以4區(qū)最多,其含量顯著高于其他三個(gè)小區(qū),尤其在0-5 cm土層中較明顯；在不同小區(qū),土壤有機(jī)質(zhì)都隨著土層的加深逐漸減少,主要集中在土壤表層。
[Abstract]:In the 2013-2014 year, based on the concept of grassland adaptation utilization, in Inner Mongolia Xilinguole Meng Xi Wu Zhu Mu Qin flag, in the herdsman scale, in the growing season, the height of the stubble stubble of pasture was 9 + 1 cm as the final grazing time in the growing season. The following conclusions are drawn as follows: 1. the net primary productivity and the herd feed intake of the community are the indexes, and the net productivity and feed intake of the 2 area (June, August grazing) group are significantly higher than those of the other communities. It is suggested that the matching of the rotation time of this kind of grazing is the better use of pasture resources.2. for the utilization of grassland. In 20132014 years, the utilization rate of grassland was the highest in 4 areas, followed by the 2 region, and the growth rate of the community in a long period of 2 (mainly in July) was the highest in the different regeneration period of more than 55%.3.. In addition, the growth rate of the regenerated long-term community of the 4 plots was positive, which could compensate for the grazing of the herd in the first round of grazing. For the whole grazing season, the rotation of the pasture in different periods showed the same compensatory growth for the typical steppe plant community. The root biomass of each cell in the.4. area decreased gradually with the soil layer deepened, and the underground root system mainly concentrated in the 0-20cm soil layer, showing the trend of the surface layer in the.1 area, the underground root biomass was significantly lower than that of the other communities. There was no significant difference between different treatments in different treatments of.5., which could be divided into two types, which were roughly divided into two types: the increase of the shallow layer and the deep decrease in the shallow layer (1,3 area) and the deep layer of the shallow layer (2,4 District), the content of organic matter in the.6. soil was the most, and the content was significantly higher than that of the other three plots, especially in the 0-5 cm soil layer. In different plots, soil organic matter gradually decreased with the deepening of soil layer, mainly concentrated on the surface of the soil.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S812

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