Studies on cooperation phenomenon in garden crop community, 4: The present phenomenon in the edible burdock
1990
Izaki, M. (Minamikyushu Univ., Takanabe, Miyazaki (Japan). Faculty of Horticulture) | Hara, H. | Matsuda, T. | Suzuki, K.
Using "Yamadawase" cultivar the present experiment was carried out to confirm the existence of cooperation phenomenon under field condition. Seeds were sowed on Sept. 21 in 1978, and the investigations on whole plant body fresh weight, its air-dry weight, top fresh weight, its air-dry weight, underground part fresh weight its air-dry weight were carried out on Oct. 9, Oct. 18, Nov. 16 and Nov. 21. And at the same time the number, length and area of leaves and the length of tap roots were additionally investigated. From the results of the growth and development investigations with special reference to whole plant body fresh weight, its air-dry weight, top fresh weight, its air-dry weight, underground part fresh weight and its air-dry weight the authors recognized that cooperation phenomenon exists in edible burdock seedling community during about two months after sowing. The authors conjectured that the present phenomenon exists during the long time in this way on account of innately slow growth and development in early stage and fall sowing cultivation
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