Section 26
Chapter 25,587

Studies on the nutrition of the rice plant with reference to the occurrence of the so-called Akagare disease. EP. Varietal differences of the rice plant in nitrogen and carbohydrate metabolism and inorganic nutrition in relation to the occurrence of the disease

Baba, Isamu; Takahashi, Yasuo; Iwata, Iwaho; Tajima, K.

Proceedings Crop Science Society Japan 25(1): 13-14


Accession: 025586373

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Varietal differences in the susceptibility to "Akagare" disease were examined by pot experiments using paddy soil on which disease habitually occurs. Several varieties were grown with and without potassium supply in 1954, and with and without K (with starch), and without K (with starch) applied to the soil in 1955. Lack of K led to the occurrence of the disease and varietal differences in the susceptibility were observed. High negative correlation was observed between the susceptibility and starch content or content of acid hydrolyzable polysaccharides + starch. Positive correlation was found with soluble-N/starch or soluble-N/(protein-N + starch), but no significant correlation with soluble-N content, soluble-N/protein-N and K2O/N. The respiratory rate of leaves showed no significant correlation with disease occurrence, but respiratory rate/starch content showed high correlation. From these results the susceptibility of rice variety seems to be closely connected with the content of respiratory substrate in the plant.

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