Green Global
Foundation   Journal
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PERFORMANCE OF TOMATO, BRINJAL AND CABBAGE IN ALLEY CROPPING SYSTEM AS AFFECTED BY FOUR TREE SPECIES AND LEVELS OF NITROGEN IN UPLAND ECOSYSTEM (Pages : 17 - 24)

The experiment was carried out at the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU) research farm, Gazipur during the period from November 2002 to April 2003 to evaluate the productivity of three winter vegetables (tomato, brinjal and cabbage) as well as changes of soil properties at different nitrogen levels in alley cropping system. The experiment was conducted in a split plot design with three replications. Four tree species namely, Gliricidia sepium, Indigofera tysmanii, Leucaena leucocephala and Cassia siamea were arranged in the main plots while five nitrogen doses (0, 25, 50, 75 and 100% plus pruned material) were distributed to sub-plots. In the control plots, recommended N doses were used but no pruned materials were incorporated. The growth performance of four MPTS after pruning at different intervals showed that Gliricidia sepium maintained its superiority over the other tree species in terms of both tree height and number of branches per tree at all the measurement dates. The maximum amount of fresh pruned materials were produced and added to the soil by Gliricidia sepium (10.63 t ha -1 ) which was followed by Indigofera tysmanii (10.48), Cassia siamea (7.73 t ha -1 ) and Leucaena leucocephala (5.88 t ha -1 ) species, respectively. Not all the studied parameters of tomato varied significantly between 100 and 75% N plus PM added treatments. In case of cabbage, number of outer leaves per plant, fresh weight of outer leaf, head length, head diameter, head weight and yield were the maximum at 75% N plus PM added treatment, which was statistically identical with 100% plus PM added treatment. In case of brinjal, studies parameters such as plant height, fruit diameter, fruit length, number of fruits per plant, fruit weight and yield were superior at 100% N plus PM added treatment, but all the values were very close to that of 75% N plus PM added treatment. Download