THE ROLE OF MACRONUTRIENTS IN CABBAGE-HEAD FORMATION : III. Cabbage-Head Development as Affected by Nitrogen and Light
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概要
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Cabbage plants were grown at graded levels of nitrogen supply and light intensity, and the combined effects on cabbage-head development were studied during the spring and autumn seasons. The cabbage-head yield (i.e. dry weight of inner head leaves) was the highest at 50 ppm N in the nutrient solution, followed by 500 and 5 ppm N at full light intensity, and decreased with decrease in the light intensity by shading. The decrease in cabbage-head yield caused by the shading was greater at high nitrogen levels during the autumn (low solar energy) season than during the spring (high solar energy) season. As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants. Cabbage-head development occurred efficiently when the total N content in the outer leaves remained at about 2-3% and the carbohydrate production was large at full light intensity.
- 社団法人日本土壌肥料学会の論文
著者
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Hara Tetsuo
Faculty of Agriculture, Gifu University
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Sonoda Yoji
Faculty of Agriculture, Gifu University
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Sonoda Yoji
Faculty Of Agriculture Gifu University
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Hara Tetsuo
Faculty Of Agriculture Gifu University
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KIZAWA Tatsuya
Faculty of Agriculture, Gifu University
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Kizawa Tatsuya
Faculty Of Agriculture Gifu University
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