Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.agwat.2016.07.001 |
Soil moisture sensor calibration, actual evapotranspiration, and crop coefficients for drip irrigated greenhouse chile peppers | |
Sharma, Harmandeep1; Shukla, Manoj K.1; Bosland, Paul W.1; Steiner, Robert2 | |
通讯作者 | Shukla, Manoj K. |
来源期刊 | AGRICULTURAL WATER MANAGEMENT
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ISSN | 0378-3774 |
EISSN | 1873-2283 |
出版年 | 2017 |
卷号 | 179页码:81-91 |
英文摘要 | Limited water supplies in arid regions put constraints on agriculture. In arid New Mexico, greenhouse chile pepper production has the potential for water and nutrient savings. The objectives of this study were to (1) compare two capacitance sensors - (Hydra probes and 5TM) and one TDR CS616 sensor, (2) compute actual evapotranspiration (ETa) for drip-irrigated chile peppers for three water treatments, and (3) develop new crop coefficients (K-c) for the three growing seasons in a greenhouse study. Three water treatments were (1) control where water was applied near the surface using two drip emitters, (2) partial root zone drying vertical (PRDv) where subsurface irrigation was applied at 20 cm depth from soil surface, and (3) partial root zone drying compartment (PRDc) where roots were divided into two compartments and irrigation were switched between compartments after 15 days. Sensor-generated volumetric water contents (theta) were correlated with the gravimetrically determined theta, and the new calibration coefficients improved the precision of theta estimates. From 2011 onward, irrigation amounts were adjusted to minimize deep percolation, and about 30% less water was applied in 2014 as compared to the 2011 growing season but no significant differences were observed in transpiration rate and leaf temperature. The ratio of intercellular to ambient CO2 concentrations (Ci/Ca) was significantly correlated to transpiration rate and vapor pressure deficit in 2014 (P < 0.05). ETa obtained from water balance and reference ET (ETr) from Penman-Monteith developed the K-c for drip-irrigated greenhouse chile peppers for three growing seasons. The maximum values of K-c were about 1.4 during 2013 and 1.2 during 2014. The 2011 growing season was shorter and the maximum K-c were closer to one. Crop coefficients for greenhouse grown chile peppers varied with growing seasons and irrigation treatment. Irrigation scheduling can be done based on the soil moisture or K-c for the known growing season. This study demonstrated the water saving potential of PRD. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Evapotranspiration Crop coefficient Deep percolation Greenhouse Chile peppers |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000390746800009 |
WOS关键词 | WATER-CONTENT REFLECTOMETERS ; FURROW IRRIGATION ; DEEP-PERCOLATION ; NITRATE ; PROBES ; FIELD ; ZONE |
WOS类目 | Agronomy ; Water Resources |
WOS研究方向 | Agriculture ; Water Resources |
来源机构 | New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/197120 |
作者单位 | 1.Plant & Environm Sci, MSC 3Q,POB 30003, Las Cruces, NM 88003 USA; 2.New Mexico State Univ, Econ & Int Business Dept, MSC 3CQ,POB 30001, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Sharma, Harmandeep,Shukla, Manoj K.,Bosland, Paul W.,et al. Soil moisture sensor calibration, actual evapotranspiration, and crop coefficients for drip irrigated greenhouse chile peppers[J]. New Mexico State University,2017,179:81-91. |
APA | Sharma, Harmandeep,Shukla, Manoj K.,Bosland, Paul W.,&Steiner, Robert.(2017).Soil moisture sensor calibration, actual evapotranspiration, and crop coefficients for drip irrigated greenhouse chile peppers.AGRICULTURAL WATER MANAGEMENT,179,81-91. |
MLA | Sharma, Harmandeep,et al."Soil moisture sensor calibration, actual evapotranspiration, and crop coefficients for drip irrigated greenhouse chile peppers".AGRICULTURAL WATER MANAGEMENT 179(2017):81-91. |
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