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Effect of Temperature on Rice Yield and Milling Quality - What Went Wrong in 2010 and 2012?


16th Cotton And Rice Conference Baton Rouge, LA
United States
30° 27' 29.8188" N, 91° 8' 25.152" W

Publication Type:

Conference Proceedings


16th Annual National Conservation Systems Cotton & Rice Conference Program, MidAmerica Farm Publications, Baton Rouge, LA, p.21 (2013)

Accession Number:



milling quality, rice yield, USA rice production history


Rice producers, millers, and others have suspected a link between high night temperatures and reduced rice milling quality for a long time [Counce, P.A. et al., 2005]. The common response among farmers and rice producers in Mid South US indicates that higher temperatures, especially during rice heading result in lower yields and poor grain quality, i.e reduced milling. On the contrary, California rice researchers implicate drop of milling quality to repeat swings in grain moisture induced by swings in humidity and strong northern winds [Thompson and Mutters, 2006]. It is probably due to generally stable and low night temperatures in CA and their preferences for medium grain varieties. However, CA variety M204 showed decrease in milling quality with increase in night temperature in controlled experiments [A. A. Cooper et al., 2006]. There were less studies conducted on long-grain rice varieties and hybrids typically grown in the Mississippi Delta area. Analysis of RiceTec’s historical (1997-2012) multi-locational strip trials indicate unique weather conditions in 2010 and 2012 might had detrimental effect on rice yields and quality. Specific hybrids and regions within Mid-South with good or bad crop outcome will be highlighted.


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