Browsing by Author "MIAH, MD. MAIN UDDIN"

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MAXIMIZATION OF LAND USE THROUGH AGROFORESTRY PRACTICES IN FLOODPLAIN ECOSYSTEM OF BANGLADESH
(HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR., 2010-05) MIAH, MD. MAIN UDDIN; Prof. Dr. Musharraf Hossain Mian
Eight field experiments were carried out at the agroforestry research farm of Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November 2005 to June 2008 to search the suitable agroforestry practices and high productive multistoried agroforestry systems. T’. aman-wheat-mungbean cropping pattern was tested in black siris, guava and mango orchard and multistoried experiment were arranged with goraneem, ipil-ipil, banana, potato and onion. In this experiment, goraneem and ipil-ipil were used as the upper storied tree species and banana was middle storied; where potatoes followed by onion were the lower storied crops. The experiments for T. aman, wheat and mungbean were laid out in a split plot design with three replications. Tree species including one control plot were used as main plot and five (5) varieties of each test crops were assigned in sub plot. Varieties BR 10 (V;), BR 11 (V2), BRRI Dhan 33 (V3), BRRI dhan 39 (V4) and Sorna (local) were used for T. aman; Gourove (Vj), Sourave (V2), Shatabdi (V3), Kanchan (V4) and Protiva (Vs) were used for wheat; BARI Mug 3 (V;), BARI Mug 4 (V2), BARI Mug 5 (V3), BARI Mug 6 (V4) and local varieties (Vs) were used for mungbean. Other experiments for banana, potato and onion in multistoried were arranged in single factor RCBD with three replications.The study showed that various light intensities of different tree species had pronounced effect on the morpho - physiological, yield and yield contributing characters of all tested crop varieties. Considering the yield, yield attributes, HI, LER and BCR values, BR 11 for T.aman, shatabdi for wheat and BARI Mug 6 for mungbean were found superior over other varieties in most of the treatment combinations. Hence, T. amanwheat-mungbean cropping pattern (BR11- Shatabdi - BARI mug 6) in association with mango tree was found highly profitable and sustainable agroforestry practice followed by black siris based T. aman-wheat-mungbean cropping pattern. Guava was not found suitable at all for agroforestry practice especially for tested cropping pattern. Among the different combinations of multistoried systems, goraneem + banana + potato-onion system was found highly productive followed by ipil-ipil + banana + potato-onion, on the basis of LER and BCR. Effect of lower storey crops on the growth performance of MPTs showed that most of the system showed synergistic effect on crops and trees in the first year. In the following years lower storied crop yield reduced due to larger canopy effect but increment of trees enhanced due to lower storied crop management (fertilizer and irrigation) compared to open field. The highest boostering effect was found in goraneem followed by black siris. The soil properties almost remained unchanged. Soil p', calcium and magnesium were slightly increased in the soil of agroforestry systems. The study revealed that Amrapali (mango) based agroforestry using BR 11 — ShatabdiBARI Mug 6 varieties for T. aman, wheat and mungbean, respectively was the best puaatics pe the basis of sustainability evaluation which produced net return of Tk 5.12 lakh hectare” year’! followed by goraneem based ( hana + potato-onion) multistoried production aysteti sata produced Tk 3.21 lakh hectare”! year". The least production (Tk 1.12 lakh hectare’ year") was found from banana grown under ipil-ipil.
PERFORMANCE OF FIVE WINTER VEGETABLES UNDER DIFFERENT LIGHT CONDITIONS FOR AGROFORESTRY SYSTEMS
(Bangabandhu Sheikh Mujibur Rahman Agricultural University, 2001) MIAH, MD. MAIN UDDIN; Dr. Md. Giashuddin Miah
PERFORMANCE OF FIVE WINTER VEGETABLES UNDER DIFFERENT LIGHT CONDITIONS FOR AGROFORESTRY SYSTEMS
(Bangabandhu Sheikh Mujibur Rahman Agricultural University, 2001) MIAH, MD. MAIN UDDIN; Dr. Md. Giashuddin Miah
The performance of five winter vegetables was evaluated under four different light levels i.e., 100, 75, 50 and 25 percent Photosynthetically Active Radiation (PAR) at the experimental farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during November 1999 to March 2000. Different light levels i.e., 75, 50 and 25 percent PAR were attained by using nets of different pore sizes. Four winter vegetables i.e., cabbage, carrot, radish and tomato were grown as in individual experiments following the RCBD design and three varieties of eggplant i.e., Nayantara, Kajla and Uttara were grown separately in Split Plot Design. Plant height of all the five vegetables increased gradually with the decreased of light level and significantly the longest plant was found under 25 percent PAR level i.e. severe shade level. Other parameters of the tested vegetables varied differentially due to variation of light levels. In cabbage, outer leaf length increased gradually with the decreased of light levels. Outer leaf breadth and yield contributing characteristics of cabbage i.e. head length, head breadth and head fresh weight were increased progressively up to 50 percent reduction of light levels. Further reduction of light level, the above parameters were drastically decreased. Fresh and dry yield (ton/ha) of cabbage produced under 50 percent PAR level were numerically higher (29.98 and 1.90, respectively) than those of yields obtained under full sunlight (28.92 and 1.72, respectively) and 75 percent PAR (29.52 and 1.89, respectively). In carrot, two parameters, i.e. plant height and leaf length were increased with the decreased of light levels. But the other parameters showed the superior performances under 25 percent reduced light level (75% PAR) and the least performances under 25 percent PAR level. The highest yield (30.64 ton/ha) was found under 75 percent PAR (25% reduced light) which was even statistically higher than those of the yields obtained under full sunlight (100% PAR) and 50 percent PAR. In radish, leaf length and leaf breadth increased gradually with the decreased of light level. In case of number of leaves per plant and dry weight of leaves per plant, the best performances were observed under 75 percent PAR level (25% shade level) and the poorest performances were observed under 25 percent PAR level (75% shade level). The values of the yield contributing characteristics such as radish length and radish girth were found the highest under 75 percent PAR level. Similarly, significantly the highest fresh yield of radish was found under 75 percent PAR level. In tomato, some parameters such as number of primary branches, number of fruit per cluster, fruit diameter, fruit weight were decreased with the decreased of light levels, and other parameters such as number of leaves per plant, number of cluster per plant, number of fruit per plant and yield were increased up to 25 percent reduction of PAR level. Further reduction of PAR level, these parameters vi were decreased gradually. The total yield of tomato obtained under full sunlight (94.62 ton/ha), 25 percent reduced light (96.02 ton/ha) and 50 percent reduced light (87.70 ton/ha) did not vary significantly but yield obtained under 75 percent reduced light level decreased remarkably. Among three varieties of eggplant, primary branches of Nayantara and number of leaves per plant of all the varieties were the highest under 75 percent PAR level. Fruit length and number of fruits per plant of all the three varieties were higher under 100 percent PAR. Fruit diameter of Nayantara only and fruit weight of all the varieties were higher under 75 percent PAR level. Fruit diameter of other two varieties i.e. Kajla and Uttara were higher under 100 percent PAR. Yield (t/ha) of eggplant irrespective of varieties were the highest under 100 percent PAR. However, yields decreased gradually with decreased of light levels. Relationship between light and yields of the studied vegetables were estimated. In case of eggplant, linear relationship between fresh yield and percent PAR was found, whereas in case of cabbage, carrot, radish and tomato quadratic (polynomial) relationships were found. From the above studies, it may be stated that the performances of different winter vegetables under different light levels were different. But their degree of adaptability to the different light levels ie., ability to grow under shade levels in agroforestry system may be ranked as cabbage>carrot> tomato>radish>eggplant (Kajla/Nayantara>Uttara).