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文摘
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2007年5-9月在青海湖北岸的高寒草甸草原,定位研究天然草地地下、地上和总生物量的变化动态。结果表明:青海湖北岸高寒草甸草原天然牧草地上生物量有明显的季节变化,在生长季呈单峰曲线,生育初期地上生物量最小,8月中旬达到最大值,为223.0 g/m2;地下生物量空间分布为倒金字塔型,010 cm层地下生物量占地下生物总量的65%,010、1020和2040 cm层牧草地下生物量在5-9月均表现为"N"型变化规律;地下生物量周转值为0.45;在生长期内地下生物量的积累远远大于地上生物量的积累,地下生物量峰值也比地上生物量峰值提前;群落根冠比先降后升,平均值为16.1。 |
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其他语种文摘
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Dynamics of the aboveground,underground and total biomass of the alpine meadow grassland in the north shore of Qinghai Lake were studied from May to September,2007.The result showed that the curve of seasonal dynamic of the aboveground biomass was single apex,the minimum biomass was at the initial growing period and the maximum in middle August,223.0 g/m2.The distribution pattern of the underground biomass was "Inverted Pyramid" type.The underground biomass at the depth of 0-10,10-20,20-40 cm showed "N" type from May to September,biomass at the depth of 0-10 cm accounted for to 65% of the total.The turnover value of the underground biomass was 0.45.The underground biomass accumulation were much larger than that of the aboveground in growing season,and the peak value of the underground biomass was earlier than that of the aboveground,the root/shoot ratio of the community showed a decrease first and followed by a increase,the average was 16.1. |
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来源
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草业科学
,2008,25(12):62-66 【扩展库】
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关键词
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生物量
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季节动态
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草甸草原
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青海湖北岸
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地址
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1.
青海省海北牧业气象试验站, 青海, 西海, 810200
2.
中国科学院西北高原生物研究所, 青海, 西宁, 810000
3.
广东省潮州市气象局, 广东, 潮州, 521011
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-0629 |
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学科
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农作物 |
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基金
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青海省气象局科研项目(2008005)
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国家科技支撑计划项目
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中国科学院知识创新工程西部行动计划项目
;
国家自然科学基金
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:3440702
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