Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0378-3774 |
EISSN | 1873-2283 |
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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