Tillering dynamics of transplanted rice as influenced by seedling age
1992
Roy, B.C. | Sattar, S.A. (Bangladesh Rice Research Institute. Gazipur (Bangladesh). Agronomy Division)
The tillering rate as influenced by seedling age in two varieties was negatively related to initial dry matter up to 35 days after transplanting and positively thereafter. Between the varieties absolute tillering rate did not differ greatly up to 35 days after transplanting (DAT) but later on the rate of IR50 was much higher than that of BR14. The absolute tillering rate from 30 DAT and onward for 80 day old seedlings was comparatively lower than with other seedling ages. IR50 produced more tillers than BR14 in all age groups but within a variety the number of total tillers decreased with seedling age. BR14 required more dry matter to produce a tiller compared with IR50. Younger seedlings required less dry matter to produce a tiller than older ones. Production of tertiary tillers required the highest dry matter. After transplanting older seedlings required less time to enter the booting stage than the older ones. Percentage of tillers entering the booting stage was highest for primary and the lowest for tertiary tillers.
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