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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #398439
Research Project: Gene Discovery and Crop Design for Current and New Rice Management Practices and Market Opportunities

Location: Dale Bumpers National Rice Research Center

Title: An evaluation of different organic soil amendments on grain yield, yield components, and milling qualities in rice

Author
item LAMICHHANE, SUMAN - Texas A&M University
item DOU, FUGEN - Texas A&M University
item McClung, Anna

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/8/2022
Publication Date: 11/9/2022
Citation: Lamichhane, S., Dou, F., McClung, A.M. 2022. An evaluation of different organic soil amendments on grain yield, yield components, and milling qualities in rice. ASA-CSSA-SSSA International Annual Meeting, Baltimore, Maryland. November 6-9, 2022.

Interpretive Summary:

Technical Abstract: Field trials were conducted in 2010, 2015, and 2017 at Texas A and M Agrilife Research Center near Beaumont, TX to evaluate the effectiveness of different sources and rates of organic soil fertilizers on rice grain yield, yield components, and milling qualities. Among six organic nitrogen (N) sources tested in 2010 field trial, two sources, Nature Safe and Rhizogen, demonstrated higher grain yield and per unit N application compared to other organic N sources. Field experiment conducted in 2015 using Nature Safe, showed that grain yield and yield parameters including panicle number, 1,000-grain-weight, grain number per panicle, and dry biomass were significantly impacted by the nitrogen rates. However, the yield parameters, except 1,000-grain-weight, were not impacted by the interaction of variety x nitrogen rates and the main effect of variety. Yield and grain milling qualities are equally important for high economic returns. Interestingly, the 2015 study showed that under organic cultivation, the Tesanai 2 variety had a similar yield potential but higher whole-grain milled percentage compared to the hybrid cultivar, XL 753. Nevertheless, yield plateaus were not observed even at higher N supply in all three studies, indicating low N assimilation and uptake of applied N sources in Texas soil.