Comparison of young seedling growth under low nutrient concentration in culture solution among rice cultivars

Irmawati, Irmawati and Kobayashi, Yurika and Ono, Kenta and Kadir, Sabaruddin and Ehara, Hiroshi (2011) Comparison of young seedling growth under low nutrient concentration in culture solution among rice cultivars. Proceeding onNew Frontier of Sustainable agriculture and Rural Development in East and Southeast Asia. pp. 45-48.


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The growth of rice seedlings under lower nutient concentations was compared among 12 cultivars. The seedlings were cultured under 3 levels of nutrient concentation of Kimura B solution. The result showed various responses of cultivars in total dry matter weight (TDW)and relative growth rate (RGR). Therefore, they were classified into 4 groups based on RGR change: group A (IR28, Dular, Toyonishiki, Akebono and Owarihatamochi), B (Koshihikari), C (IR60, Pokkali, Kasalattr, Rikuto norin 2l), and D (IR42 and IR50). To analyze the cause of variations in growth rate among them, the correlation between leaf area ratio (LAR) and net assimilation rate (NAR) was investigated. Total nitrogen concentration in plant tissue and nitrogen content per unit leaf area were also examined. Under moderate nutient concenhation (50% steagth), physiological response was regarded more cnrcial in determining growth rate in this level. Then, Pokkali, Kasalath, Dular and Rikuto Norin 2l were considered as the best cultivars attributed to their ability in maintaining NAR and the amount of nitrogen accumulated in their leaves. However, when the nutrient concentation decreased to 25% stength, morphological characteristics had more influence to the seedlings growth. Therefore, Dular and Owarihatamochi then were considered as good cultivars in this level.

Item Type: Article
Subjects: S Agriculture > SB Plant culture > SB1-1110 Plant culture
Divisions: Faculty of Agriculture > 54201-Agribusiness (S1)
Depositing User: Ph.D. Sabaruddin Kadir
Date Deposited: 11 Oct 2019 13:56
Last Modified: 11 Oct 2019 13:56

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