Arid
DOI10.1016/j.sajb.2017.10.017
Viability of watering Portulacaria afra truncheons to facilitate restoration of subtropical thicket: Results from a nursery experiment and costmodel
Mills, A. J.1; Milton, S. J.2; Taplin, B. D.3; Allen, J. L.4
通讯作者Mills, A. J.
来源期刊SOUTH AFRICAN JOURNAL OF BOTANY
ISSN0254-6299
EISSN1727-9321
出版年2018
卷号115页码:58-64
英文摘要

Intensive goat farming has transformed more than a million hectares of subtropical thicket in South Africa from a dense closed-canopy shrubland into an open savanna-like system. Restoration of the degraded thicket landscapes can be achieved by planting truncheons of spekboom (Portulacaria afra). The sale of carbon sequestered by spekboom can potentially fund restoration projects. Maximising the rate of spekboom growth at the outset of such projects will be critical for covering upfront costs. To investigate the potential effects of watering on restoration projects, we applied 16 different watering treatments to 320 spekboom truncheons in a nursery environment over eight months. The application of 4 L of water over eight watering events per month achieved the maximal mean increase in basal stem diameter for unrooted truncheons, namely 5.6 +/- 1.8 mm. By comparison, application of 6 L of water over four watering events per month resulted in a maximal mean increase of 5.0 +/- 3.7 mm for rooted truncheons. The estimated total cost of manually watering truncheons in the field ranged from ZAR560 to ZAR4840 per month for truncheons planted 2 m apart (i.e. 2500 truncheons per hectare), and was ZAR59 per month for truncheons planted inmicro-basins 20m apart (i.e. 25 micro-basins per hectare). The former costs would not be affordable for restoration projects financed through sale of sequestered carbon, but the latter costs would be. Dense planting of truncheons in shallow trenches and/or micro-basins - which would collect rainwater - is a promising new protocol for increasing the rate of carbon sequestration at the start of restoration projects. (c) 2017 SAAB. Published by Elsevier B.V. All rights reserved.


英文关键词Spekboom Truncheons Micro-basins Rainwater harvesting Succulent
类型Article
语种英语
国家South Africa
收录类别SCI-E
WOS记录号WOS:000429451700010
WOS关键词SOUTH-AFRICA ; EASTERN CAPE ; SUCCULENT THICKET ; L JACQ ; DESERTIFICATION ; TRANSFORMATION
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/213270
作者单位1.Stellenbosch Univ, Dept Soil Sci, ZA-7602 Matieland, South Africa;
2.Renu Karoo Veld Restorat CC, Arid Lands Node, South African Environm Observat Network, POB 47, ZA-6930 Prince Albert, South Africa;
3.Conservat Management Serv, 12 Stinkwood Crescent, ZA-6571 Knysna, South Africa;
4.C4 EcoSolut, 9B Mohr Rd, ZA-7945 Tokai, South Africa
推荐引用方式
GB/T 7714
Mills, A. J.,Milton, S. J.,Taplin, B. D.,et al. Viability of watering Portulacaria afra truncheons to facilitate restoration of subtropical thicket: Results from a nursery experiment and costmodel[J],2018,115:58-64.
APA Mills, A. J.,Milton, S. J.,Taplin, B. D.,&Allen, J. L..(2018).Viability of watering Portulacaria afra truncheons to facilitate restoration of subtropical thicket: Results from a nursery experiment and costmodel.SOUTH AFRICAN JOURNAL OF BOTANY,115,58-64.
MLA Mills, A. J.,et al."Viability of watering Portulacaria afra truncheons to facilitate restoration of subtropical thicket: Results from a nursery experiment and costmodel".SOUTH AFRICAN JOURNAL OF BOTANY 115(2018):58-64.
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