Struvite Effects on Rice Growth and Productivity under Flood-Irrigation in the Greenhouse  

作　　者：Diego Della Lunga Kristofor R. Brye Trenton L. Roberts Chris G. Henry Michelle A. Evans-White Daniel J. Lessner Diego Della Lunga;Kristofor R. Brye;Trenton L. Roberts;Chris G. Henry;Michelle A. Evans-White;Daniel J. Lessner(Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA;Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, USA;Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA)

机构地区：[1]Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA [2]Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, USA [3]Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA

出　　处：《Agricultural Sciences》2023年第7期864-877,共14页农业科学（英文）

摘　　要：In recent years, electrochemical precipitation has gained interest as an alternative method for the synthesis of various minerals, including struvite, from waste streams that can serve as an alternative fertilizer. Studies in lowland cultivations, specifically rice (Oryza sativa) under flood-irrigated conditions, evaluating struvite as a possible alternative phosphorus (P) fertilizer source have been limited. The objective of this study was to evaluate rice response to electrochemically precipitated struvite (ECST) compared to triple superphosphate (TSP), diammonium phosphate (DAP), a chemically precipitated struvite (CPST), and an unamended control (UC), grown under flooded-soil conditions in the greenhouse. Aboveground vegetative dry matter (DM) P concentration was greatest from the UC (0.18%) and was lowest from DAP (0.08%). Root DM Mg concentration was greatest from ECST (0.13%) and was lowest from TSP (0.10%). Grain yield was greatest from DAP (11.2 Mg•ha⁻¹) and was lowest from the UC (4.0 Mg•ha⁻¹). Grain N, P, K, and Mg uptake were consistently greatest from DAP and consistently lowest from the UC. Grain N concentration was 1.1 times greater from CPST than from ECST, while all other measured rice properties did not differ between the struvite-P sources. The many similar rice responses between struvite materials (ECST and CPST) and TSP and DAP demonstrate that struvite, particularly ECST, is a valid alternative fertilizer-P source for rice-production systems. Further studies should evaluate potential environmental implications (i.e., runoff water quality and greenhouse gas emissions) from struvite use that could affect agricultural sustainability.In recent years, electrochemical precipitation has gained interest as an alternative method for the synthesis of various minerals, including struvite, from waste streams that can serve as an alternative fertilizer. Studies in lowland cultivations, specifically rice (Oryza sativa) under flood-irrigated conditions, evaluating struvite as a possible alternative phosphorus (P) fertilizer source have been limited. The objective of this study was to evaluate rice response to electrochemically precipitated struvite (ECST) compared to triple superphosphate (TSP), diammonium phosphate (DAP), a chemically precipitated struvite (CPST), and an unamended control (UC), grown under flooded-soil conditions in the greenhouse. Aboveground vegetative dry matter (DM) P concentration was greatest from the UC (0.18%) and was lowest from DAP (0.08%). Root DM Mg concentration was greatest from ECST (0.13%) and was lowest from TSP (0.10%). Grain yield was greatest from DAP (11.2 Mg•ha⁻¹) and was lowest from the UC (4.0 Mg•ha⁻¹). Grain N, P, K, and Mg uptake were consistently greatest from DAP and consistently lowest from the UC. Grain N concentration was 1.1 times greater from CPST than from ECST, while all other measured rice properties did not differ between the struvite-P sources. The many similar rice responses between struvite materials (ECST and CPST) and TSP and DAP demonstrate that struvite, particularly ECST, is a valid alternative fertilizer-P source for rice-production systems. Further studies should evaluate potential environmental implications (i.e., runoff water quality and greenhouse gas emissions) from struvite use that could affect agricultural sustainability.

关 键 词：GREENHOUSE Nitrogen PHOSPHORUS Rice Production STRUVITE 

分 类 号：S51[农业科学—作物学]