Carbon and Nitrogen Dynamics Affected by Drip Irrigation Methods and Fertilization Practices in a Pomegranate Orchard Tirado Corbalá, Rebecca Gao, Suduan Ayars, James E. Phene, Claude J. Phene, Rebecca C.
dc.contributor.campus University of Puerto Rico at Mayaguez College of Agricultural Sciences en_US
dc.contributor.department Department of Crops and Agro-Environmental Sciences en_US 2023-01-30T12:42:01Z 2023-01-30T12:42:01Z 2019-12-10
dc.description.abstract Knowledge of carbon (C) and nitrogen (N) dynamics under different irrigation practices in pomegranate orchards is novel and essential to develop sustainable production systems. The aim of this research was to determine the effect of high-frequency drip irrigation and different rates of N fertilizer on C and N distribution in the soil and N uptake by pomegranate fruit and leaves. The main treatments were surface drip irrigation (DI) and subsurface drip irrigation (SDI), and the sub-treatments used were three initial N rates (N1, N2, and N3). As trees grew larger, the N application rate increased. From 2013–2015, trees received the following rates of N: 62–113 (N1), 166–263 (N2), or 244–342 kg/ha (N3). Soil and leaf total C (TC) and N (TN), soil dissolved organic C (DOC), soil nitrate (NO3−), and total N uptake by fruit were evaluated between 2012 and 2015. Soil samples were collected to 120 cm depth at 15 cm increments. DI resulted in higher concentrations of TN, TC, NO3−, and DOC in the upper 75 cm depth than SDI. The N3 treatment resulted in higher concentrations of TN, TC, NO3−, and DOC under both DI and SDI. Neither DI nor SDI at the N1 or N2 levels increased TN and NO3− concentrations at 105–120 cm soil depth, indicating reduced leaching risk using high-frequency drip irrigation. Higher N uptake by fruit was observed in SDI than in DI in 2014 and 2015, and in N2 and N3 treatments compared with N1 in 2013 and 2014. The data indicate that the application rate at 166–263 kg/ha (N2) provided sufficient N for a 4–6-year-old pomegranate orchard and that high-frequency SDI is a promising technology for achieving higher N use efficiency and minimizing leaching loss of NO3− and DOC. en_US
dc.description.sponsorship We acknowledge California Department of Food and Agriculture (CDFA) for supplemental funding, KARE Center for the field site, and the following companies for contributions to this project: Paramount Farming—trees and cones, Toro Irrigation—drip tubing, Lakos Filtration—sand media, Dorot—electronic control valves, Verdegaal Brothers—fertilizers, and SDI+—consulting time and miscellaneous equipment. en_US
dc.description.version Accepted Manuscript en_US
dc.identifier.citation Horticulturae 2019, 5(4), 77 en_US
dc.identifier.issn 2311-7524 en_US
dc.language.iso en en_US
dc.publisher Horticulturae en_US
dc.rights Attribution-NonCommercial-ShareAlike 3.0 United States *
dc.rights.holder (c) 2019-Rebecca Tirado Corbalá en_US
dc.rights.uri *
dc.source.uri en_US
dc.subject dissolved organic carbon en_US
dc.subject total carbon en_US
dc.subject total nitrogen en_US
dc.subject nitrate en_US
dc.subject subsurface drip irrigation en_US
dc.subject.lcsh Pomegranate--Effect of minerals on en_US
dc.subject.lcsh Micro Irrigation en_US
dc.subject.lcsh Fertilizers en_US
dc.subject.lcsh Pomegranate--Effect of nitrogen en_US
dc.subject.lcsh Pomegranate--Effect of carbon on en_US
dc.title Carbon and Nitrogen Dynamics Affected by Drip Irrigation Methods and Fertilization Practices in a Pomegranate Orchard en_US
dc.type Article en_US
dspace.entity.type Publication Soil Sciences en_US
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