Arid
DOI10.1016/j.geomorph.2014.12.028
Contour bench terrace (shich/shikim) forestry systems in the semi-arid Israeli Negev: Effects on soil quality, geodiversity, and herbaceous vegetation
Stavi, I.1; Fizik, E.2; Argaman, E.2
通讯作者Stavi, I.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2015
卷号231页码:376-382
英文摘要

Forestry activities are a widely accepted means of restoring degraded lands. In the semi-arid Negev of southern Israel, extensive lands have been modified for runoff-harvesting-based afforestation projects comprised of contour bench terrace systems (also called shichs/shychs/shikim). However, some alarming evidence in recent years calls for assessing the environmental impact of these forestry lands. We assessed the effects of contour bench terrace afforestation systems on herbaceous.vegetation productivity and the soil quality of the uppermost layer (0-5 cm depth) and the 0-80 cm profile, in 2-year-old and 9-year-old afforestation systems, and natural, unperturbed hillslopes in the multi-aged Ambassadors’ Forest Results revealed considerable differences between the sink (contour bench terraces) and source (inter-terrace spaces) areas of the afforested lands. Normalizing data to the relative cover of these areas revealed similar herbaceous vegetation biomass and soil wetting front values for the natural hillslopes (1.47 Mg ha(-1) and 59.8 cm, respectively) and 9-year-old afforestation systems (1.64 Mg ha(-1) and 59.3 cm, respectively), and significantly lower values for the 2-year-old systems (0.07 Mg ha(-1) and 49.4 cm, respectively). Unexpectedly, the opposite trend was recorded for soil hygroscopic moisture content, which was significantly smaller for the natural hillslopes (1.7%) and 9-year-old systems (1.9%) than the 2-year-old systems (3.2%). Soil bulk density was also significantly affected by afforestation treatment, following the trend 2-year-old systems > 9-year-old systems > natural hillslopes (1.57, 1.55, and 1.53 Mg In-3, respectively). Soil penetration resistance varied greatly throughout the 80-cm soil profile. There was no significant effect of afforestation treatment on soil gravimetric moisture content (in the spring). Overall, soil quality and herbaceous vegetation cover were only slightly greater on the north-facing aspects than those on the south-facing aspects. We concluded that the establishment of contour bench terraces increases geodiversity on a hillslope scale, but removes the surface soil (A horizon) from extensive areas, increases soil compaction, and decreases herbaceous vegetation production, adversely affecting soil quality, pastoral productivity, and ecosystem functioning and health in the short term. However, over the long term, self-restoration of small-scale geodiversity and functioning of the geo-ecosystem is suggested to improve soil quality and increase herbaceous vegetation productivity in these dryland afforestation systems. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Degradation and desertification Erosion control Mesic vs. xeric conditions Soil embankment Surface hydrology Water conservation
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000348957100032
WOS关键词SERVICES ; CRUSTS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187513
作者单位1.Dead Sea & Arava Sci Ctr, IL-88840 Ketura, Israel;
2.Minist Agr & Rural Dev, Soil Eros Res Stn, IL-50250 Bet Dagan, Israel
推荐引用方式
GB/T 7714
Stavi, I.,Fizik, E.,Argaman, E.. Contour bench terrace (shich/shikim) forestry systems in the semi-arid Israeli Negev: Effects on soil quality, geodiversity, and herbaceous vegetation[J],2015,231:376-382.
APA Stavi, I.,Fizik, E.,&Argaman, E..(2015).Contour bench terrace (shich/shikim) forestry systems in the semi-arid Israeli Negev: Effects on soil quality, geodiversity, and herbaceous vegetation.GEOMORPHOLOGY,231,376-382.
MLA Stavi, I.,et al."Contour bench terrace (shich/shikim) forestry systems in the semi-arid Israeli Negev: Effects on soil quality, geodiversity, and herbaceous vegetation".GEOMORPHOLOGY 231(2015):376-382.
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