DOI: 10.1016/j.foreco.2017.04.010
Scopus记录号: 2-s2.0-85017509090
论文题名: Comparison of soil amendments for reforestation with a native multipurpose tree under semiarid climate: Root and root tuber response of Spondias tuberosa
作者: Mertens J. ; Germer S. ; Germer J. ; Sauerborn J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 396 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Amelioration
; Drylands
; Hydrotropism
; Root plasticity
; Umbuzeiro
Scopus关键词: Agronomy
; Clay minerals
; Drought
; Fertilizers
; Forestry
; Manures
; Minerals
; Plants (botany)
; Reforestation
; Soil moisture
; Soils
; Amelioration
; Dry land
; Hydrotropism
; Root plasticities
; Umbuzeiro
; Tubes (components)
; bulk density
; comparative study
; drought resistance
; endemic species
; native species
; reforestation
; root
; semiarid region
; soil amendment
; soil management
; species richness
; tropical forest
; tuber
; Brazil
; Capra hircus
; Spondias tuberosa
英文摘要: The Caatinga biome, characterized by a species-rich seasonally dry tropical forest, but highly disturbed covers most of Brazil's Northeast. Endemic to this biome is the multipurpose tree Spondias tuberosa Arr., which forms numerous root tubers to resist drought stress. In order to develop improved soil management for reforestation with S. tuberosa the response of its root system to different soil amendments was studied with 52 seedlings, using goat manure, clay substrate, biochar as soil amendments, and mineral fertilizer. The default root architecture of three-year-old S. tuberosa and the relation between soil physical parameters and fine root dry matter (≤2 mm), root length density, root tuber volume, root tuber fresh weight, and shoot-root ratio were analyzed. Seedlings still formed a tap root with a maximum rooting depth of 63 cm and a maximum horizontal extent of 35 cm, developing 2–4 root tubers per seedling. Fine root dry matter in 3000 cm3 soil samples differed significantly, ranging from 0.23 g in the control to 0.03 g in the treatment combining manure with biochar and mineral fertilizer. According to the orthogonal contrast, manure was the pivotal soil amendment affecting fine root dry matter negatively. Simultaneously, manure application led to increased soil water content compared to treatments without. The shoot-root ratio increased by 32% compared to the control, when S. tuberosa was grown in wet soils. Root tuber growth was significantly enhanced by manure addition. This effect is attributed to a reduction of soil bulk density as root tuber volume exhibited a negative correlation with soil bulk density. There was no statistical relationship between root tuber volume and seedling survival during the field experiment. Compared with the control, neither clay, biochar nor solely mineral fertilization significantly affected root growth. Soil management focused on improving water availability is suspected of hampering fine root growth of S. tuberosa seedlings, whereas reducing soil bulk density enables better root tuber development and could, therefore, be a promising measure to increase S. tuberosa drought resistance in the long term for more successful reforestation. Disregarding its negative impact on fine root growth, we assume manure is the most promising amendment among the tested treatments, due to its positive effect on root tuber growth. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64333
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Stuttgart, Germany; Department of Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy, Potsdam, Germany; Biospheric Theory and Modelling Group, Max-Planck Institute for Biogeochemistry, Jena, Germany
Recommended Citation:
Mertens J.,Germer S.,Germer J.,et al. Comparison of soil amendments for reforestation with a native multipurpose tree under semiarid climate: Root and root tuber response of Spondias tuberosa[J]. Forest Ecology and Management,2017-01-01,396