CAJ | 학술논문

采用随机区组试验方法,研究了内蒙占高原荒漠草原地区不同载畜率对冷蒿构件数量特征的影响,结果表明:冷蒿生长时期和载畜率是影响冷蒿构件数量的关键因素,相同载畜率水平下,冷蒿的营养枝密度、不定根密度和匍匐茎长度为生长末期>生长盛期>生长初期,生殖枝8月最多,冷蒿生长盛期和末期,轻牧区的营养枝密度、不定根密度和匍匐茎长度显著增加(P<0.05);同一生长季节生殖枝随载畜率的增大显著下降(P<0.05),极度干旱的2005年没有形成生殖枝,说明干旱也是限制冷蒿生殖生长的关键性因子.荒漠草原地区冷蒿的繁殖格局以营养繁殖为主,占到80%以上,随载畜率的增加.冷蒿的营养枝分化率逐渐增加.
채용수궤구조시험방법,연구료내몽점고원황막초원지구불동재축솔대랭호구건수량특정적영향,결과표명:랭호생장시기화재축솔시영향랭호구건수량적관건인소,상동재축솔수평하,랭호적영양지밀도、불정근밀도화포복경장도위생장말기>생장성기>생장초기,생식지8월최다,랭호생장성기화말기,경목구적영양지밀도、불정근밀도화포복경장도현저증가(P<0.05);동일생장계절생식지수재축솔적증대현저하강(P<0.05),겁도간한적2005년몰유형성생식지,설명간한야시한제랭호생식생장적관건성인자.황막초원지구랭호적번식격국이영양번식위주,점도80%이상,수재축솔적증가.랭호적영양지분화솔축점증가.
The experiment was conducted in Stipa breviflora desert steppe in Inner Mongolia located in 41°47'17"N, 111°53'46"E, altitude 1450m in 2004. The objectives were to study the influence of different stocking rates on Arternisia frigida module number characteristics with random plot group methods. The results showed that Arternisia frigida module characteristics were changed with grazing season and stocking rates. The density of vegetative shoots and reproductive shoots of Arternisia frigida were increased with the grazing season in 2004, density of reproductive shoots were highest in August. Density of vegetative shoots was highest in light grazed (LG) plot, and gradually decreased with the stocking rates increased, density of reproductive shoots were decreased significantly. Because of less raining, no repro- ductive shoots occurred in 2005. Adventitious root density and repens length were the same change like density of vegetative shoots. Spacer length was almost no change, but decreased in heavy grazed plot (HG), the result indicated that adventitious root density and repens length were increased with the same time, Artemisia frigida depends on adventitious root to get nutritious matter and live space. With the stocking rates increased, differentiation ratio of vegetative shoots of Arternisia frigida was gradually in- creased, and the reproductive patter was mostly vegetative propagation which occupy over 80%.