Estimated Grass Grazing Removal Rate in a Semiarid Eurasian Steppe Watershed as Influenced by Climate
Estimated Grass Grazing Removal Rate in a Semiarid Eurasian Steppe Watershed as Influenced by Climate
复制标题
半干旱欧亚草原流域受气候影响的牧草去除率估算
DOI：
10.3390/w8080339
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发表时间：
2016-08
期刊：
影响因子：
3.4
通讯作者：
Yanyun Luo
中科院分区：
文献类型：
--
作者：
Tingxi Liu;Ruizhong Gao;Fengling Li;Yanyun Luo
草的放牧去除率需要针对各种气候条件来确定，以解决生态环境问题（例如，荒漠化）与草原退化有关。传统的方法需要对动物种类和头数以及每头动物的草消耗量进行调查，这种方法成本太高，耗时太长，无法在流域范围内应用。本研究的目的是提出一种新的方法，可以用来估计放牧去除率，不需要动物相关的数据。在欧亚半干旱典型草原流域的分析期为2000年至2010年，这种新方法的应用进行了演示。结果表明，从上游到下游，去除率有变大的趋势，但其时间变化有变小的趋势。在分析期间，整个流域的平均去除率范围为63.9至401.0 g DM m−2（或22.4至60.9%）。正如预期的那样，在一个大气潮湿的一年，去除率高于在一个大气干燥的一年。尽管如此，11个分析年的去除率均未超过65%的阈值，高于该阈值，草地退化的风险将变得更大。
Grazing removal rate of grasses needs to be determined for various climate conditions to address eco-environmental concerns (e.g., desertification) related to steppe grassland degradation. The conventional approach, which requires survey data on animal species and heads as well as grass consumption per individual animal, is too costly and time-consuming to be applied at a watershed scale. The objective of this study was to present a new approach that can be used to estimate grazing removal rate with no requirement of animal-related data. The application of this new approach was demonstrated in a Eurasian semiarid typical-steppe watershed for an analysis period of 2000 to 2010. The results indicate that the removal rate tended to become larger, but its temporal variation tended to become smaller, from the upstream to downstream. Averaged across the watershed, the removal rate ranged from 63.9 to 401.0 g DM m−2 (or 22.4 to 60.9%) during the analysis period. As expected, the removal rate in an atmospherically wetter year was higher than that in an atmospherically drier year. Nevertheless, none of the eleven analysis years had a removal rate higher than the threshold value of 65%, above which the risk of grassland degradation would become much greater.
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影响因子：
5.4
作者：
E. Istanbulluoglu;Tiejun Wang;Olivia M. Wright;J. Lenters
通讯作者：
E. Istanbulluoglu;Tiejun Wang;Olivia M. Wright;J. Lenters
DOI：
10.1080/00224065.1986.11978989
发表时间：
1975-03
期刊：
--
影响因子：
--
作者：
M. Kutner
通讯作者：
M. Kutner
DOI：
10.1061/(asce)0733-9437(2003)129:4(256
发表时间：
2003-07
期刊：
Journal of Irrigation and Drainage Engineering-asce
影响因子：
--
作者：
S. Irmak;A. Irmak;James W. Jones;T. Howell;J. Jacobs;R. Allen;G. Hoogenboom
通讯作者：
S. Irmak;A. Irmak;James W. Jones;T. Howell;J. Jacobs;R. Allen;G. Hoogenboom
影响因子：
5.4
作者：
Dawen Yang;F. Sun;Zhiyu Liu;Z. Cong;G. Ni;Z. Lei
通讯作者：
Dawen Yang;F. Sun;Zhiyu Liu;Z. Cong;G. Ni;Z. Lei
影响因子：
3.2
作者：
Xixi Wang;Xiaomin Yang;Ting-xi Liu;Fengling Li;R. Gao;L. Duan;Yanyun Luo
通讯作者：
Xixi Wang;Xiaomin Yang;Ting-xi Liu;Fengling Li;R. Gao;L. Duan;Yanyun Luo