Effect of seasonal variation and plant density on growth and yield of three soybean cultivars under Kamphaeng Saen environment
1995
Aroon Nuamnoi
Study which has been conducted involved three soybean cultivars, Sukhotai 1, S.J.4 and Leichhardt grown under two irrigation schemes, ample and limited irrigation supply, also under two plant population treatments, 200,000 and 400,000 plant/ha. The experiments were conducted three times in early rainy, late rainy and dry seasons respectively at Kamphaeng Saen campus of Kasetsart University in Nakhon Pathom province of Thailand. Results of this study revealed that growth and development of soybean depended mainly on sowing dates as it influenced the phenological development of soybeans. The different flowering dates and maturation of soybeans as affected by sowing dates affected total dry matter and leaf area index development. Apparently adapted cultivars grown under high plant population produced higher total dry matter and leaf area index. Apparently, appropriate cultivars and higher plant population increases total dry matter yield and leaf area index. Based on physiological analysis of yield constraints, sowing dates had shown to be the most important factors for yield increases at Kamphaeng Saen. Sowing dates affected soybean yield components, percentage of light transmission into canopy, increases photosynthetically active radiation (PAR), efficiency of conversion (Ec) and influences appropriate maturation period. Cultivars has been found to be the second most important yield constraint while plant density and irrigation supplies were range third and the least among the four factors used in this study. Therefore, selection of appropriate sowing dates such as the early rainy season and also employing adapted cultivars of soybeans would be most beneficial for yield increases at Kamphaeng Saen environments.
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Este registro bibliográfico ha sido proporcionado por Kasetsart University