Author
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Kasperbauer, Michael |
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Submitted to: Agronomy Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 10/1/1996 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Poor seedling establishment may occur if straw remains on the soil surface when double-cropping cotton after wheat harvest. Objectives were to examine effects of straw-covered versus bare soil on spectrum of light reflected to newly emerged cotton seedling shoots and on root/shoot growth relationships. Seedlings were grown in a greenhouse in pots of loamy sand that were covered with styrofoam insulation panels. Five-cm holes were cut so that a hole was centered over each pot. The panels were covered with fresh wheat straw, weathered straw, or bare soil. Soil temperatures did not differ among the pots below the insulation panels that supported the various surface materials. However, the different colored straw and soil reflected different far-red to red light (FR/R) ratios. Seedlings were cut at the soil surface seven days after emergence and they were evaluated for root and shoot development. The fresh wheat straw reflected the highest FR/R ratio and seedlings developed the least root length, lowest root weight, longest stems, heaviest shoots, and lowest root/shoot weight ratio. |
