Abstract
An alternative crop with potential for dryland crop production in the Great Plains is camelina (Camelina sativa L. Crantz). Time of planting is an important management consideration that can affect camelina production. A study was carried out in the spring of 2013, 2014, and 2015 to evaluate seeding date effects on spring camelina varieties grown under dryland conditions in western Kansas. Three spring varieties (Blaine Creek, Pronghorn, and Shoshone) were planted at three seeding dates: early (April 3, 2013; March 17, 2014; and March 18, 2015); mid (April 16, 2013; April 1, 2014; and April 1, 2015); and late (April 30, 2013; April 15, 2014; and April 15, 2015). Parameters collected included time of flowering and physiological maturity, stand count at maturity, seed yield, biomass yield, harvest index, oil and protein content. Our findings indicate that seeding date can affect the time of flowering and physiological maturity, stand count, seed yield, biomass yield, harvest index, and protein content, but it did not affect oil content. Harvest index and oil content was significantly different among varieties. In general, mid and late seeding dates produced the highest yield across the three years. There were yield differences among varieties; Blaine Creek produced the highest seed yield and was significantly different from Pronghorn and Shoshone. Seed yield ranged between 340 and 440 lb/a. Average oil and protein content was 26% and 30%, respectively. Based on environmental factors and agronomic characteristics, camelina varieties were more productive when planted between early and midApril.
Highlights
Conditions in western Kansas make camelina a potential candidate to intensify the wheat cropping system
Planting allows camelina to mature before the onset of hot summer temperatures in the central Great Plains (GP) that can affect seed yield
A study was carried out in the spring of 2013 and 2014 to evaluate planting date effects on spring camelina varieties grown under dryland conditions in western Kansas
Summary
Identifying crops that are adapted to dryland environments of the central and northern Great Plains (GP) has been a major challenge. Planting allows camelina to mature before the onset of hot summer temperatures in the central GP that can affect seed yield. A study was carried out in the spring of 2013 and 2014 to evaluate planting date effects on spring camelina varieties grown under dryland conditions in western Kansas. Three spring varieties (Blaine Creek, Pronghorn, and Shoshone) were planted at three seeding dates (early, mid, and late). Our findings indicate that seeding date affected time of flowering and physiological maturity (P < 0.05) but had no effect on oil content. Year × camelina variety interaction had a significant effect on seed yield. Protein content differed among the varieties (Blaine Creek > Pronghorn > Shoshone). Blaine Creek consistently produced the highest yield in both years and had a protein content of 30%
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