| 牦牛放牧率对小嵩草高寒草甸不同植物类群地上生物量生产率的影响 |
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| 引用本文： | 董全民,李青云,马玉涛,施建军,王启基.牦牛放牧率对小嵩草高寒草甸不同植物类群地上生物量生产率的影响[J].四川草原,2003(6):21-24. |
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| 作者姓名： | 董全民 李青云 马玉涛 施建军 王启基 |
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| 作者单位： | [1]青海省畜牧兽医科学院，西宁810003；中国科学院西北高原生物研究所，西宁810002 [2]青海省畜牧兽医科学院，西宁810003 [3]中国科学院西北高原生物研究所，西宁810002 |
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| 基金项目： | 青海省“九五”攻关项目(编号96-N-112) |
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| 摘 要： | 2年的牦牛放牧试验表明:除不同植物本身的生理特性外,降水和地温是影响小嵩草高寒草甸两季草场不同植物类群地上生物量绝对生长率的关键因素。小嵩草高寒草甸两季草场地上总生物量的绝对生长率1999年在7月份最大;1998年,冷季草场各放牧处理的绝对生长率在8月份达到最大,暖季草场的对照组和轻牧组在7月份最大,中牧组和重牧组在8月份最大。不同植物类群地上生物量生长率的变化不尽相同。1998年,冷季草场禾草和莎草地上生物量的绝对生长率8月份达到最大,暖季草场禾草和莎草地上生物量的绝对生长率7月份达到最大,且9月份出现了营养的再次积累;1999年,冷季草场禾草地上生物量的绝对生长率在6月份和8月份出现了两个峰值,暖季草场禾草地生物量的绝对生长率在7月份达到最大。对杂草类而言,1998年冷季草场的绝对生长率6月份最大,暖季草场重牧组的绝对生长率8月份达到最大,其他各处理7月份达到最大;1999年重牧组杂草的绝对生长率在6月份达到最大,其他各处理杂草在8月份达到最大。
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| 关 键 词： | 小嵩草高寒草句 牦牛放牧率 暖季草场 冷季草场 地上生物量 绝对生长率 |
Effects of Stocking Rates for Yaks on Absolute Growth Ratio of Aboveground Biomass for Different Plant Groups in Kobrecia parva Alpine Mead |
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| DONG Quan-ming,LI Qing-yun,MA Yu-shou,QI Jian-jun,WANG Qi-ji.Effects of Stocking Rates for Yaks on Absolute Growth Ratio of Aboveground Biomass for Different Plant Groups in Kobrecia parva Alpine Mead[J].Journal of Sichuan Grassland,2003(6):21-24. |
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| Authors: | DONG Quan-ming LI Qing-yun MA Yu-shou QI Jian-jun WANG Qi-ji |
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| Abstract: | The result of trial for two years indicated that precipitation and ground temperature was pivotal factors that influenced on absolute growth ratio of aboveground biomass for different plant groups in kobrecia parva alpine meadow two-season pastureland except for physiological peculiarity of different plants. Absolute growth ratio of total aboveground biomass for two-season pasturelands in kobrecia parva alpine meadow reached to the maximum in July in 1999. And then in 1998, absolute growth ratio of every treatment was maximum in cold season pastureland in 1999. And then in 1998, absolute growth ratio of every treatment was maximum in cold season pastureland in August, and control and light grazing in July, moderate grazing and heavy grazing in August in warm season pastureland. The changes of absolute growth ratio of aboveground biomass for different plant groups were also different. Inl998,the absolute growth ratio of aboveground for grasses and sedges reached to the maximum in cold season pastureland in August, and in July in warm season pastureland, and there was once again accumulation of nutrition in September. But in 1999, there were two peak values of absolute growth ratio for aboveground biomass of grasses and sedges in cold season pastureland in June and August respectively, and the maximum was in July in warm season pastureland. As-for weeds, in 1998, the pastureland, in August for heavy grazing, in July for others treatments; in 1999, the maximum was in June for heavy grazing, in August for others treatments in two season pasturelands. |
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| Keywords: | Kobrecia parva alpine meadow Stocking rates of yaks Warm season pastureland Cold season pastureland Weeds Aboveground biomass Absolute growth ratio |
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