| 青海高寒天然草地施氮肥试验 |
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| 引用本文： | 纪亚君.青海高寒天然草地施氮肥试验[J].中国草地学报,2005,27(6):67-69. |
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| 作者姓名： | 纪亚君 |
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| 作者单位： | 青海省畜牧兽医科学院,青海,西宁,810003 |
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| 摘 要： | 采用氮肥单因子试验研究了施用氮肥对高寒草甸的增产效应。结果表明:就两年累积增产效应而言,施肥量为37.5kg/hm2时,单位尿素可获得地上总生物量的最大增产量为27.84 kg,而当施肥量为225kg/hm2时,禾本科牧草可以获得单位尿素的最大增产量为17.48kg。综合考虑两年草地总生物量、优良牧草生物量的变化,认为天然高寒草甸草地施氮量为225 kg/hm2时可以获得最大禾草产量及单位尿素最大增产量,有利于退化天然草地向良性方向发展。
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| 关 键 词： | 高寒草甸 氮肥 牧草产量 |
| 文章编号： | 1000-6311(2005)06-0067-03 |
| 修稿时间： | 2005年2月24日 |
Effects of Nitrogen on Grass Yield in Qinghai Alpine Meadow |
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| JI Ya-jun.Effects of Nitrogen on Grass Yield in Qinghai Alpine Meadow[J].Chinese Journal of Grassland,2005,27(6):67-69. |
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| Authors: | JI Ya-jun |
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| Abstract: | The experiments were carried out with a solo-factor trail on fertilizer application(Urea,with 46% effective nitrogen),to study the effect of fertilizer application rate on the grass yield of alpine pasture.The results showed that nitrogen fertilizer may significantly increase the yield.The total biomass of aboveground increased most by 27.84kg per kg urea at application rate of 37.5 kg/hm~2 urea,while aboveground biomass of grasses gained the most increased yield 17.48kg/kg urea at the appliction rate of 225kg/hm~2.Considering the total biomass of aboveground,biomass of fine herbage on alpine grassland,the optimal fertilizer application rate in natural alpine meadow is 225kg/hm~2,which can obtain the most fine grass yield and the biggest increased amount of grass yield per kg nitrogen fertilizer. |
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| Keywords: | Alpine meadow Nitrogen fertilizer Grass yield |
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