Grazing Effects on Floristic Composition and Above Ground Plant Biomass of the Grasslands in the Northeastern Mongolian Steppes
Grazing Effects on Floristic Composition and Above Ground Plant Biomass of the Grasslands in the Northeastern Mongolian Steppes
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DOI：
10.5141/jefb.2008.31.2.115
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发表时间：
2008-05
影响因子：
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通讯作者：
I. Hayashi;K. Kawada;M. Kurosu;Amgaa Batjargal;Tsagaanbandi Tsundeekhuu;Toru M. Nakamura
中科院分区：
文献类型：
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作者：
I. Hayashi;K. Kawada;M. Kurosu;Amgaa Batjargal;Tsagaanbandi Tsundeekhuu;Toru M. Nakamura
我们描述了利用样方抽样技术获得的蒙古草原的植物生物量。研究了蒙古东北部的四个地点，它们位于和之间，是典型的草原草原。对放牧和未放牧林分的生物量、碳和氮含量进行了测定。通过以上测量，我们期望获得有关放牧对草原的影响和草原从空气中固碳的信息。为了在不破坏林分的情况下估算生物量，我们推导了一个用株高和林分内物种盖度来描述植物生物量与v值之间关系的方程。2005年6月下旬，未放牧林和放牧林的估计植物生物量分别介于和之间和之间。未放牧和放牧林的凋落物变化范围从到和从到，相似。植物和凋落物中碳和氮的平均含量分别为43.0%和1.9%和33.7%和1.4%。在Baganuur的研究地点，植物材料(植物加凋落物)的碳和氮含量在2005年6月30日被监测到。
We describe plant biomass in the grasslands of the Mongolian steppe obtained using a quadrat sampling technique. Four sites were studied in the northeastern Mongolia located between and and and , which were typical grasslands of the steppe. Biomass, carbon and nitrogen content were determined for the plants collected from the grazed and ungarazed stands. With the measurements above, we expect to obtain information on grazing effects on the grasslands and carbon sequestration of the grassland from the air. In order to estimate the biomass without destroying the stands, we derived an equation to describe the relationship between plant biomass and v-value using plant height and species coverage within the stand. Estimated plant biomass in the ungrazed and grazed stands ranged between and and between and in late June 2005, respectively. Litter in the ungrazed and grazed stands ranged from to and from to , similarly. Average carbon and nitrogen contents in plants and in litter were 43.0% and 1.9% and 33.7% and 1.4%, respectively. In study sites at Baganuur, the carbon and nitrogen content of plant materials (plant plus litter) was and on 30 June 2005.