Author (s): F.A.I. Tabib1* and M.G.G. Mortuza2
*Correspondent author Email: tabibfai@gmail.com
*Correspondent author Email: tabibfai@gmail.com
Abstract
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during November 1992 to June 1993 to examine the growth and biomass production of relayed Sesbania rostrata as affected by boro rice seedling (cv. BR14) age (30, 45 and 60 days) and different spacings of 48-days Sesbania seedlings (80 -120 cm). Sesbania seedlings transplanted 53 days after trasplanting of rice between 1-3 alternate rice rows. The highest dry matter rate of Sesbania (1.29 g plant-1 day-1) was obtained from 30 day old rice seedlings wherein 100 cm spaced Sesbania was planted in three alternate rice-rows. Forty five day old seedling produced highest grain (4.72 t ha-1) yield, 80 cm spaced Sesbania rostrata produced highest biomass but reduced rice grain yield significantly. The highest dry
matter accumulation rate (1.16 g plant-1 day-1) and total biomass production (6.71 t ha-1) of Sesbania; and rice grain yield (4.59 t ha-1) were recorded in 100 cm spaced Sesbania planted at three alternate rice-rows, 80 cm spaced Sesbania planted at one alternate rice-rows and 120cm spaced Sesbania planted at three alternate rice-rows respectively.
Key words: Seedling age, Biomass production, Sesbania rostrata
J. Expt. Biosci. 3(1): January 2012
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