水稲「台中65号」の生態的並びに形態的特性について
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概要
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As it is considered that the selection of the best adapted varieties ef paddy rice is the most important need for the improvement of the paddy rice production in Okinawa, an experiment was conducted to compare some characteristics of Taichu No. 65, which has been the leading variety, with those of two other varieties as follows. Date of transplantation cultivated varieties Earlier period cultivation June 11, 1955 Taichu No. 65, Norin No. 18 Standard " July 4, 1955 Taichu No. 65, Norin No. 18 and Rikuu No. 132 The results obtained are as follows: (1) The rices grown at the earlier period had more leaves on the main stems than those grown at the standard period. Norin No. 18 had one leaf more than Taichu No. 65 did. Taichu No. 65 and Narin No. 18 had almost the same appearance cycle of each leaf on the main stem in the earlier part of growth period, but Taichu No. 65 had the shorter appearance cycle in the later part of the growth period than Norin No. 18 did. (2) Taichu No. 65 and Norin No. ]8 had almost the same turning period of leaf appearance cycle, and it came earlier for both varieties in standard cultivation. (3) The number of tillers per hill of Taichu No. 65 was not many and there was few third order tillers. Therefore, the first and second order tillers occupied the large proportion of the total number of tillers, and the proportion of the stems which bore panicles was considerably high. (4) The rices grown on the standard period had the shorter growing period, from the seeding date to the heading date, than those grown at the earlier period; but the length of the growing period of Taichu No. 65 was not changed much by the changes of the growing period. (5) Taichu No. 65 had the longer, heavier panicles and greater number of unhulled grain per panicle than Norin No. 18 did. (6) The tillers from No. 7 and No. 8 loci of both Taichu No. 65 and Norin No. 18 had the heavier panicles and culm-base, and the greater number of grains than the second order tillers which developed at the same time with the former ones, but the tillers from No.9 locus were inferior to the second order tillers which developed at the same time.
- 琉球大学農家政学部の論文
- 1956-07-00