Optimization of plant coverage in relation to water balance in the Loess Plateau of China
Optimization of plant coverage in relation to water balance in the Loess Plateau of China
复制标题
中国黄土高原植物覆盖度与水平衡的优化
DOI：
10.1016/j.geoderma.2011.12.016
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发表时间：
2012-03
期刊：
影响因子：
6.1
通讯作者：
Mingan Shao
中科院分区：
文献类型：
--
作者：
Wei Fu;Mingbin Huang;Jacques Gallich;Mingan Shao
在黄土高原水蚀风蚀过渡带，为改善环境质量，减少水土流失，实施了一系列植被恢复措施。有限的水资源与保护土壤不受加速侵蚀所需的广泛的植物覆盖之间存在着不相容性。研究了植被覆盖度与土壤水分的关系，以确定该地区两种优势灌木（柠条锦鸡儿和沙柳）的最佳植被覆盖度。在2008年、2009年和2010年的生长季节，对每种灌木进行了四种覆盖处理（T0、T1、T2和T3）的试验。用中子探针测定土壤含水量。利用SHAW模型模拟了一个关键气候年--十分之一干旱年的土壤水分变化。使用每个物种T2覆盖范围0- 200 cm土壤层中测量的土壤含水量来校准SHAW模型的土壤和植物参数。校准模型进行了验证，使用测量T0，T1，和T3植物覆盖。结果表明，随着植被覆盖度的增加，0- 200 cm土层土壤贮水量逐渐减少。不同植被覆盖度下0- 200 cm土层土壤干燥化程度不同。植被覆盖度越大，两种灌木的土壤干燥化程度越大。SHAW模型经土壤和植被参数校正后，能较好地模拟不同植被覆盖度下0- 200 cm土壤水分的变化。在验证阶段，实测和模拟土壤水分含量之间的均方根误差（RMSE）范围为0.022至0.033 cm-3，相对均方根误差（RRMSE）范围为14.4%至24.6%。根据土壤水分亏缺和植物生长的观测和模拟结果，最佳植被覆盖度对应的最大叶面积指数为1.27。korshinkii和S.沙生植物
A series of revegetation practices have been implemented to improve the environmental quality and to reduce water and soil losses in the wind and water erosion transitional belt of China's Loess Plateau. An incompatibility exists between the limited water availability and the extensive plant coverage needed to protect the soil from accelerated erosion. The objective of this study was to investigate the relationship between plant coverage and soil water to determine the optimal plant coverage for the two dominant shrubs (Caragana korshinkii Kom and Salix psammophila) in this area. Experiments were performed with four coverage treatments (T0, T1, T2, and T3) for each shrub during the growing seasons of 2008, 2009 and 2010. Soil water content was measured with a neutron probe. The Simultaneous Heat and Water Transfer (SHAW) model was used to simulate soil water content variations for a critical climatic year, i.e. the one-in-ten dry year. The soil and plant parameters of the SHAW model were calibrated using the measured soil water content in the 0–200cm soil layer of the T2 coverage for each species. The calibrated model was verified using measurements for T0, T1, and T3 plant coverages. The results indicated that soil water storage in the 0–200cm soil layer decreased with increasing plant coverage. Soil desiccation occurred at various depths in the 0–200cm soil layer for the different plant coverages. The degree of soil desiccation was greater for the two shrubs when plant coverage was more extensive. The SHAW model, calibrated for soil and plant parameters, accurately simulated soil water variations in the 0–200cm profile under different plant coverages. During the verification phase, the root mean square error (RMSE) between the measured and simulated soil water contents ranged from 0.022 to 0.033cm3cm−3and the relative root mean square error (RRMSE) ranged from 14.4% to 24.6%. Based on the observed and modeled interactions of soil water depletion and plant growth, the optimal plant coverage corresponds to a maximum LAI of 1.27 for C. korshinkii and 0.70 for S. psammophila.
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DOI：
10.1016/s0166-2481(08)x7009-6
发表时间：
1985
期刊：
--
影响因子：
--
作者：
G. Campbell
通讯作者：
G. Campbell
影响因子：
3.9
作者：
G. Preston;R. Mcbride
通讯作者：
G. Preston;R. Mcbride
DOI：
10.1016/s0933-3630(97)00013-5
发表时间：
1997-10
期刊：
Soil Technology
影响因子：
--
作者：
R. Morgan;K. McIntyre;A. Vickers;J. Quinton;R. Rickson
通讯作者：
R. Morgan;K. McIntyre;A. Vickers;J. Quinton;R. Rickson
影响因子：
3.2
作者：
J. Gibson;T. Edwards;T. Prowse
通讯作者：
J. Gibson;T. Edwards;T. Prowse
DOI：
10.2136/sssaj1999.03615995006300020014x
发表时间：
1999-03-01
影响因子：
2.9
作者：
Cerdà, A
通讯作者：
Cerdà, A