| dc.description | Agroforestry has been a collective term for land-use systems and practices in
which woody perennials are deliberately integrated with crops and/or animals
on the same land-management unit, either in a spatial mixture or a temporal
sequence. The trees in agroforestry practices generally fulfill multiple
purposes, involving the protection of the soil or improvement of its fertility,
as well as the production of one or more products (Cooper et al., 1996). The
domestication of these agroforestry trees should enhance their capacity to
fulfill either or both of these service or production functions. Domestication
should also aim at increasing the social and economic benefits of
agroforestry, through improved profitability, reduced risks and diversified
sources of income to buffer against crop failure (Sanchez, 1995). This will
act as an incentive for adoption by farmers. | en_US |
| dc.description.abstract | A field experiment was conducted at the Agroforestry Farm, Department of
Agroforestry, Hajee Mohammad Danesh Science and _ Technology
University, Dinajpur, during June 2006 to November 2006 to evaluate the
performance of transplanted Aman rice grown under different multipurpose
tree species at various shading condition. Five variety cv. BR10, BR11,
BRRI dhan 33, BRRI dhan 39 and Sorna were cultivated under three
different tree species namely, Black siris, Guava and Mango. The experiment
was laid out in split plot design with four replications where tree species
were in main plot and rice variety was in sub plots. The data were collected
at 30, 45, 60 and 75 DAT (days after transplanting) and finally after
harvesting. The significant effect of partial shade was found in number of
effective tiller / hill, length of leaf blade, breadth of leaf blade and plant
height at 30 DAT, plant fresh weight, straw- root fresh & dry weight, unfilled
grain / panicle, 1000 grain weight and grain yield. The varietal effect was
significantly observed on number of leaf / hill, length of leaf blade, breadth
of leaf blade at 30 DAT, plant height & number of effective tiller / hill at 30,
45, 60 & 75 DAT, plant fresh weight, straw root fresh and dry weight, days
to maturity, panicle length, number of grain / panicle, unfilled grain / panicle,
1000 grain weight and grain yield. The interaction effect was significantly
found in number of leaf / hill, length of leaf blade, breadth of leaf blade at 30
DAT, plant height at 30, 45 & 75 DAT, number of effective tiller / hill at 45
DAT, plant fresh weight straw root fresh & dry weight, unfilled grain /
panicle and grain yield. It was recorded that in partial shade condition the
highest grain yield (3.78 t / ha) was found under Black siris which was
statistically similar to that of Mango and the lowest grain yield was found
(3.50 t / ha) under Guava. The highest plant height was recorded (62.90 cm)
at 30 DAT under Mango which was statistically similar to that of Black siris
and the lowest plant height was found under Guava at 30 DAT. | en_US |
