Effect of fencing, artificial seeding and abandonment on vegetation composition and dynamics of ‘black soil land’ in the headwaters of the Yangtze and the Yellow Rivers of the Qinghai‐Tibetan Plateau
Effect of fencing, artificial seeding and abandonment on vegetation composition and dynamics of ‘black soil land’ in the headwaters of the Yangtze and the Yellow Rivers of the Qinghai‐Tibetan Plateau
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DOI：
10.1002/ldr.861
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发表时间：
2008-09
影响因子：
4.7
通讯作者：
Z. Shang;Y. S. Ma;R. Long;L. Ding
中科院分区：
文献类型：
--
作者：
Z. Shang;Y. S. Ma;R. Long;L. Ding
草地管理可以影响天然草地群落的植物多样性和植物功能群。为了改善青藏高原长江黄河源头“黑土地”草地现有有毒和杂草植被的畜牧业，在5年的时间内（2000-2005年），采用3种处理（围栏-FT，人工播种当地草-ST和放弃-AT）。将处理地块中的植物多样性和类群（莎草、草和矮灌木）与未处理的对照地块进行比较。结果表明：（1）FT促进了杂类草种类的增加，但对其它植物功能类群没有影响;（2）在ST条件下，杂类草物种丰富度下降，而禾本科草物种增加，表明在短期内播种本地草可以改变黑土土地的植物组成，并增加草的比例，从而增加放牧的牧草;（3）AT，翻耕后，与CK样地相似，杂类植物是5年的优势植物功能群。总之，通过围栏、人工播种或放弃将有毒和杂草植物的黑土土地覆盖物改变为更有用的牲畜放牧植物的目标从长远来看并不成功。版权所有© 2008约翰威利父子有限公司。
Rangeland management can affect plant diversity and plant functional groups of native grassland communities. To improve pasture for livestock grazing from the existing poisonous and ruderal vegetation in the ‘black soil land’ grassland in the headwaters of the Yangtze and the Yellow Rivers (HAYYR) of the Qinghai‐Tibetan Plateau, three treatments (fencing‐FT, artificial seeding with local grasses‐ST and abandonment‐AT) were applied during a 5‐year period (2000–2005). Plant diversity and groups (sedges, grasses and dwarf shrubs) in the treated plots were compared with non‐treated control plots. Results showed that (1) FT promoted an increase in forbs species, but there was no change in the other plant functional groups; (2) with ST, species richness of forbs decreased but grass species increased indicating that sowing local grasses could change plant composition of black soil land in the short‐term, and increase the proportion of grasses and, thus, forage for grazing and (3) AT, after plowing, was similar to CK plots, with forbs being the dominant plant functional group for the 5 years. In conclusion, the goal to alter black soil land cover from poisonous and ruderal plants to more useful plants for livestock grazing by either fencing, artificial seeding or abandonment was not successful in the long term. Copyright © 2008 John Wiley & Sons, Ltd.