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Effects of Fertilizer Inputs, Natura...
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Santiago, John Michael.
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Effects of Fertilizer Inputs, Natural Amendments, and Cultural Practices on Citrus Root and Rhizosphere Health.
Record Type:
Electronic resources : Monograph/item
Title/Author:
Effects of Fertilizer Inputs, Natural Amendments, and Cultural Practices on Citrus Root and Rhizosphere Health./
Author:
Santiago, John Michael.
Published:
Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:
130 p.
Notes:
Source: Dissertations Abstracts International, Volume: 85-08, Section: B.
Contained By:
Dissertations Abstracts International85-08B.
Subject:
Horticulture. -
Online resource:
https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30423442
ISBN:
9798381698572
Effects of Fertilizer Inputs, Natural Amendments, and Cultural Practices on Citrus Root and Rhizosphere Health.
Santiago, John Michael.
Effects of Fertilizer Inputs, Natural Amendments, and Cultural Practices on Citrus Root and Rhizosphere Health.
- Ann Arbor : ProQuest Dissertations & Theses, 2023 - 130 p.
Source: Dissertations Abstracts International, Volume: 85-08, Section: B.
Thesis (Ph.D.)--University of Florida, 2023.
Huanglongbing (HLB) is a disease that impacts citrus on a global scale and has reduced citrus production in Florida by over 75%. There is no cure for HLB, although strategies have been employed to manage disease symptoms. Improved nutrient guidelines, cultural practices, and soil amendments have been implemented to improve both the health and yield of HLB-affected citrus. The objectives of this study were to determine the impacts of different fertilizer treatments, fabric mulch ground covers, and oak mulch on HLB-affected citrus root health and rhizosphere composition. A 2-year field study consisting of 'Ray Ruby' (Citrus x paradisi) grapefruit trees on Kuharske citrange (Citrus sinensis x Poncirus trifoliata) was established using four foliar fertilizer and two granular fertilizer treatments. Trees were planted at three varying densities. The other experiment consisted of two treatments, which included trees grown with fabric mulch ground covers and trees grown without fabric mulch ground covers. Plant material consisted of four-year old lemon trees cv. 'Meyer' (Citrus limon) grafted on 'sour orange' (Citrus x aurantium) rootstocks. The third experiment consisted of two treatments, which includes trees treated with oak mulch and a control. Plant material consisted of Valencia Orange (pummelo x mandarin orange) on US 812 rootstock. Grapefruit trees treated with the CRF2 granular and 6x foliar fertilizer treatments resulted in significantly greater Zn and Mn than respective fertilizer treatments. Significantly greater abundances of Rhizobiales and Vicinamibacterales were found in the rhizosphere of grapefruit trees treated with 0x UF/IFAS foliar fertilizer treatment compared to other treatments. Lemon trees treated with fabric mulch ground covers resulted in significantly greater soil Zn and Mn, including significantly greater soil temperatures after 5:00 PM. Lemon trees treated with fabric mulch ground covers had a significantly more diverse rhizosphere composition. Oak mulch treated sweet orange trees resulted in significantly greater soil Zn and Mn, including a significantly more diverse rhizosphere bacterial community composition compared to control treated trees. Long-term research that examines above and belowground components of citrus will provide a better understanding of the efficacy of fertilizers regimes, fabric mulch ground covers, and oak mulch amendments.
ISBN: 9798381698572Subjects--Topical Terms:
555447
Horticulture.
Subjects--Index Terms:
Fertilizer inputs
Effects of Fertilizer Inputs, Natural Amendments, and Cultural Practices on Citrus Root and Rhizosphere Health.
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Huanglongbing (HLB) is a disease that impacts citrus on a global scale and has reduced citrus production in Florida by over 75%. There is no cure for HLB, although strategies have been employed to manage disease symptoms. Improved nutrient guidelines, cultural practices, and soil amendments have been implemented to improve both the health and yield of HLB-affected citrus. The objectives of this study were to determine the impacts of different fertilizer treatments, fabric mulch ground covers, and oak mulch on HLB-affected citrus root health and rhizosphere composition. A 2-year field study consisting of 'Ray Ruby' (Citrus x paradisi) grapefruit trees on Kuharske citrange (Citrus sinensis x Poncirus trifoliata) was established using four foliar fertilizer and two granular fertilizer treatments. Trees were planted at three varying densities. The other experiment consisted of two treatments, which included trees grown with fabric mulch ground covers and trees grown without fabric mulch ground covers. Plant material consisted of four-year old lemon trees cv. 'Meyer' (Citrus limon) grafted on 'sour orange' (Citrus x aurantium) rootstocks. The third experiment consisted of two treatments, which includes trees treated with oak mulch and a control. Plant material consisted of Valencia Orange (pummelo x mandarin orange) on US 812 rootstock. Grapefruit trees treated with the CRF2 granular and 6x foliar fertilizer treatments resulted in significantly greater Zn and Mn than respective fertilizer treatments. Significantly greater abundances of Rhizobiales and Vicinamibacterales were found in the rhizosphere of grapefruit trees treated with 0x UF/IFAS foliar fertilizer treatment compared to other treatments. Lemon trees treated with fabric mulch ground covers resulted in significantly greater soil Zn and Mn, including significantly greater soil temperatures after 5:00 PM. Lemon trees treated with fabric mulch ground covers had a significantly more diverse rhizosphere composition. Oak mulch treated sweet orange trees resulted in significantly greater soil Zn and Mn, including a significantly more diverse rhizosphere bacterial community composition compared to control treated trees. Long-term research that examines above and belowground components of citrus will provide a better understanding of the efficacy of fertilizers regimes, fabric mulch ground covers, and oak mulch amendments.
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https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30423442
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