Skip-Row and Equidistant-Row Barley with Nitrogen Placement: Yield, Nitrogen Uptake, and Root Density
- B. S. Sharratt and
- V. L. Cochran
Small grain management strategies are sought in the subarctic that improve the plant growing environment and maximize production. This study assessed whether seed-row configuration and N fertilizer placement could alter growth and yield of barley (Hordeum vulgare L.) in the subarctic. Row spacing and N placement treatments established at Fairbanks, AK, during 1987 through 1989 consisted of equidistant-row planting (0.18-m equidistant seed rows) with N banded between alternate rows or broadcast and incorporated, and skip-row planting (skipping every third row of equidistant rows) with N banded between the two closely spaced rows or broadcast and incorporated. Plant characteristics evaluated included tiller and head density, straw and grain yield, N uptake, leaf area, and root length density. Soil core samples were extracted to approximately 1 m in the mid-interrow position near anthesis to determine root length density by the line intersect method. Tiller density was the primary yield component differing among treatments. Equidistant-row barley had more tillers which resulted in a higher head density, 40% higher leaf area, and higher grain and straw yields than skip-row barley. Rooting in the top 0.1 m of soil was more proliferous where N fertilizer was banded rather than broadcast, but total N uptake was not different among treatments. This study indicated that growth and yield of barley in the subarctic were favored by equidistant-row planting with either banded or broadcast N applications.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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