Arid
DOI10.1016/j.agwat.2013.09.018
Increased root zone oxygen by a capillary barrier is beneficial to bell pepper irrigated with brackish water in an arid region
Ityel, Eviatar1; Ben-Gal, Alon2; Silberbush, Moshe1; Lazarovitch, Naftali1
通讯作者Lazarovitch, Naftali
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2014
卷号131页码:108-114
英文摘要

Limitations to growth and biomass production are expected under high (>30 degrees C) soil temperatures due to low soil oxygen levels and insufficient oxygen transport to roots. These limitations will be exacerbated when irrigation with brackish water dictates large amounts of water application for leaching salts. We hypothesized that the introduction of an artificial capillary barrier (CB), in the form of a gravel layer at the lower root-zone boundary, can increase yields of irrigated horticultural crops due to better soil aeration and improved oxygen supply to roots. The specific objectives of the study were (1) to isolate scenarios where insufficient oxygen concentrations may limit pepper plant growth, (2) to measure oxygen concentrations in media under varied scenarios of CB placement below the active root zone and (3) to understand the environmental factors leading to sub-optimum oxygen concentrations in horticultural soils in a desert environment where supra-optimal soil temperatures are prevalent. At high root-zone temperatures oxygen flux to the roots was lower than the potential uptake rate and therefore soil oxygen concentrations were sub-optimal. These conditions led to reduced plant biomass and fruit yield. Fruit yield was found to decrease by 1% for every soil oxygen concentration decrease of 700 ppm. In a fine textured Reg soil, allowing roots to penetrate into the capillary barrier gravel layer increased oxygen concentration in the root zone by 5% and improved biomass and fruit yield by 16% and 18%, respectively. (C) 2013 Elsevier B.V. All rights reserved.


英文关键词Bell pepper Soil oxygen Soil respiration Hypoxia Capillary barrier
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000328180000011
WOS关键词AIR-FILLED POROSITY ; HORTICULTURAL CROPS ; SOIL-TEMPERATURE ; TOMATO PLANTS ; MINE TAILINGS ; RESPIRATION ; DIFFUSION ; GROWTH ; SALINITY ; CULTURE
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
来源机构Ben-Gurion University of the Negev
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180505
作者单位1.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Wyler Dept Dryland Agr, French Associates Inst Agr & Biotechnol Drylands, Sede Boqer Campus, IL-84990 Sede Boqer, Israel;
2.Gilat Res Ctr, Dept Environm Phys & Irrigat, Agr Res Org, IL-85280 Negev, Israel
推荐引用方式
GB/T 7714
Ityel, Eviatar,Ben-Gal, Alon,Silberbush, Moshe,et al. Increased root zone oxygen by a capillary barrier is beneficial to bell pepper irrigated with brackish water in an arid region[J]. Ben-Gurion University of the Negev,2014,131:108-114.
APA Ityel, Eviatar,Ben-Gal, Alon,Silberbush, Moshe,&Lazarovitch, Naftali.(2014).Increased root zone oxygen by a capillary barrier is beneficial to bell pepper irrigated with brackish water in an arid region.AGRICULTURAL WATER MANAGEMENT,131,108-114.
MLA Ityel, Eviatar,et al."Increased root zone oxygen by a capillary barrier is beneficial to bell pepper irrigated with brackish water in an arid region".AGRICULTURAL WATER MANAGEMENT 131(2014):108-114.
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