Effects of fertilization and cutting hight on growth and yield of ratooning rices
2000
Mochizuki, T. (Kyushu Univ., Fukuoka (Japan)) | Kajihara, Y. | Torikai, Y. | Nakagawa, Y.
Effects of fertilization and cutting-hight on growth and yield of ratooning rices were investigated. The highest grain yield of ratooning rices was obtained in highest fertilization and higher cutting plot, which was 199gm(-2) and 229gm(-2), respectively, in Koshihikari and Yumetsukushi. Total grain yields of parent and ratoon crops were about 700gm(-2) in both varieties. Dry matter yield was highest in the same plot, which was 780gm(-2) and 739gm(-2), respectively, in Koshihikari and Yumetsukushi, and total dry matter yields were over 2000gm(-2) in both varieties. These results suggested that the ratooning rice is useful as a succeeding crop of an early culture rice and/or a forage crop in Northern Kyushu. There were significant effects of fertilization and cutting hight on the yields of grain and dry matter and the number of tillers in ratooning rices at 1 % or 5 % probability levels. Fertilization and higher cutting increased the number of tillers, resulting in the increase in grain and dry matter yields. The increase in the number of ripened tillers by the both treatments was mainly due to the increase in the number of secondary and tertiary ones. The leaf number of fourth tillers was smaller than that of others
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