Contribution of different bud types to community regeneration on a typical steppe under various enclosure durations in Inner Mongolia, China
Contribution of different bud types to community regeneration on a typical steppe under various enclosure durations in Inner Mongolia, China
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不同封育期限下内蒙古典型草原不同芽类型对群落更新的贡献
DOI：
10.32604/phyton.2014.83.407
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发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
Busso C.A.
中科院分区：
文献类型：
--
作者：
Wang Zhengwen;Liu Zhimin;Kuang Wennong;Busso C.A.
了解草地围栏封牧后芽库总量的变化及其对群落更新的贡献，对草地管理至关重要。尽管它的重要性，总芽库和不同芽类型的社区更新作为一个整体的贡献很少被探讨。在内蒙古典型草原上，研究了不同放牧封育时间的草地上，不同芽型植物的营养子代。连续放牧条件下的营养子代总密度显著高于围栏草地（p<0.05），但不同放牧年限的围栏草地营养子代总密度差异不显著。连续放牧下分蘖分株的比例和密度显著高于围栏草地（p<0.05）。根茎分株则相反（p<0.05）。不同放牧年限草地和连续放牧草地的鳞茎分株比例和密度差异不大。根系分株只发生在围栏样地。结果表明：（1）封育家畜减少了草地地下芽库的营养更新;（2）封育时间对地下芽库对营养更新的整体贡献没有明显影响，但改变了不同芽类型的相对贡献;（3）封育降低了分蘖分株的密度，根状茎和根的树苗密度增加。因此，不同芽型的更新贡献的变化可用于预测干扰和气候变化下的群落动态，以及制定适当的草地管理和利用政策。
Understanding the changes in the total bud bank, and its contribution to community regeneration, in response to grassland enclosure to livestock grazing, is crucial for grassland management. Despite its importance, the contribution of the total bud bank and that of different bud types to community regeneration as a whole have been rarely explored. The vegetative offspring recruited from different bud types was investigated in grasslands having different enclosure durations to livestock grazing on a typical steppe of Inner Mongolia, China. Total vegetative offspring density was significantly higher (p<0.05) under continuous grazing than in fenced grasslands, but no significant changes were found among plots with different enclosure durations to livestock grazing. The percentage and density of tiller-ramets were significantly higher (p<0.05) under continuous grazing than in fenced grasslands. However, rhizome-ramets followed an opposite pattern (p<0.05). Bulb-ramets showed negligible differences in percentage and density among grasslands with different enclosure durations to livestock grazing and those exposed to continuous grazing. Root-derived ramets only occurred in fenced plots. Our results indicate that (1) grassland enclosure to domestic livestock reduce vegetative regeneration from belowground bud banks; (2) enclosure duration to livestock grazing showed no evident effect on the whole contribution of the belowground bud bank to vegetative regeneration, but changed the relative contribution of the different bud types, and (3) while grassland enclosure to livestock grazing reduced density of tiller-ramets, rhizome- and root-derived sapling densities were increased. Therefore, changes in the regenerative contribution of different bud types might be used to (1) predict community dynamic under disturbances and climatic changes, and (2) delineate adequate policies for grassland management and utilization.
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DOI：
10.2307/4002692
发表时间：
1996-03-01
期刊：
JOURNAL OF RANGE MANAGEMENT
影响因子：
--
作者：
Chaneton, EJ;Lavado, RS
通讯作者：
Lavado, RS
DOI：
10.1086/284683
发表时间：
1987-06
期刊：
The American Naturalist
影响因子：
--
作者：
E. Reekie;F. Bazzaz
通讯作者：
E. Reekie;F. Bazzaz
DOI：
10.1007/1-4020-4494-1_79
发表时间：
1991
期刊：
--
影响因子：
--
作者：
M. Mainguet
通讯作者：
M. Mainguet
影响因子：
1.2
作者：
Vít Latzel;J. Klimešová;J. Doležal;P. Pyšek;O. Tackenberg;K. Prach
通讯作者：
Vít Latzel;J. Klimešová;J. Doležal;P. Pyšek;O. Tackenberg;K. Prach
影响因子：
3.4
作者：
P. Vesk;M. Westoby
通讯作者：
P. Vesk;M. Westoby