| dc.description | Bangladesh is one of the most densely populated countries of the world having agro
based economy which situated in the North-Lastern part of South Asia with a tropical to
sub-tropical climate. Now the population of Bangladesh is about 140 million in an area of
147570 sq. Kilometers and growth rate is 1.47% per annum (BBS, 2004). This excessive
population creates pressure on the cultivated land. Due to rapid growth of population,
peoples are migrating to forest area and are encroaching for cultivation of food crops.
The total forest land area of the country covers about 13.36% of the land area (BBS,
2007). However according to forest master plan and surveys by multilateral donor
agencies, a total of 76900 ha or 6% of the country land mass has actual tree coverage
(Bangladesh stat. Environ. Rep.1999), But to enjoy benefit of nature we should have at
least 25% of our land covered with forest. Under this alarming situation, incorporation of
cereals like wheat is very important as the population of the country is increasing whereas
cultureable land is decreasing and hence agroforesty system can be an effective and
comfortable cultivation approach. | en_US |
| dc.description.abstract | An experiment was carried out at the Agroforestry Research Farm, Hajee Mohammad
Danesh Science and Technology University, Dinajpur, during 24 November 2009 to 15
March 2010 to observe the performance of wheat varieties under mango tree in the different
shading conditions. Four different wheat varieties like Bijoy, Satabdi, BAW-1059 and
Prodip were used in the case of mango based agroforestry system; it was consisted of mango
at the top layer and the tested wheat crops at the ground layer. There was also a control
(Open field) treatment. The experiment was laid out in the two factors Randomized
Complete Block Design (RCBD) with three replications. The results of the study revealed
that growth and yield contributing characters of wheat were vary significantly with different
production systems. Significant effect of different systems was found on the plant height,
number of effective tiller plant’, length of spike (cm), no. of spikelet spike’, effective
spikelet spike’, no. of grain plant’, grain weight plant (g), 1000-grain weight plant".
Again, the quality parameter (germination %, vigour test, root & shoot length, root and
shoot fresh & dry weight plant “') of wheat were also vary significantly with different
production systems. Germination %, vigor test and root length (cm) of wheat were the
highest when it was grown in sole cropping whereas root and shoot dry weight/plant (g)
was maximum when it was grown under mango based agroforestry systems. In case of yield,
the highest yield was obtained in sole cropping of wheat while lowest yield was found under
mango based agroforestry systems. Again, in respect of the wheat varieties (Bijoy, Satabdi,
BAW-1059 and Prodip), Prodip gave the maximum yield under mango based agroforestry
systems and also in sole cropping. The suitability of the cultivation of wheat variety under
mango based agroforestry systems may be ranked as Prodip> BA W-1059 > Satabdi > Bijoy.
Again, BCR of mango based agroforestry system (3.04) was superior over control (2.55).
From the findings it may be predicted that the cultivation of wheat in the floor of mango
orchard ensures higher revenue to the farmers compared to its sole cropping. Among the
four varieties, Prodip was the best performer to be grown under mango based agroforestry
systems considering the additional returns as per investment in terms of money and time. | en_US |
