ABSTRACT

A field experiment was conducted at the Najirpur farm near Pabna town of during the period from 05 February 2015 to 25 May 2015 to observe the performance (growth and yield) of okra, bottle gourd grown at different distances from the Xylia dolabriformis. Different treatments of the experiment were T1 (3 feet distance from tree), T2 (6 feet distance from tree), T3 (9 feet distance from tree), T4 (open field referred as control). The experiment was laid out in RCBD for all crops with 3 replications. The result of the experiment revealed that the yield of the crops increased gradually with the increase of planting distance from the tree. In Okra the highest value of yield (12.50 tha-1) was found in T3 which was statistically similar to treatment T4 (open field referred as control). In case of Bottle gourd, it was also found that treatment T3 (9 feet distance from tree) produced highest yields 70 tha-1) which were statistically similar to treatment T4 (open field referred as control). In cases of lowest yield was found in T1 (3 feet distance from the tree).

Key words: Performance, agroforestry, bottle gourd.

Introduction
In Bangladesh, a large number of vegetable are grown throughout the year including summer season. About 30 per cent of vegetable are produced in summer and rainy seasons. The average consumption of vegetable in Bangladesh is only 70 g per head per day including potato and sweet potato. To supply the minimum daily requirement of 200g vegetable head day-1, national production of vegetable should be over 10 million ton in addition. The effective area of forest in Bangladesh is neither in a position to fulfill the requirements of the people’s fuel and timber nor to stabilize the climatic condition. So, conflict for land use between agriculture and forestry are prevalent in Bangladesh. Under these circumstances it is necessary to find out a suitable alternative to overcome this situation. Since there is no scope for expanding forest area and sole grain crops area. Recently, some techniques have already been advocated to overcome future food challenges, vegetable agroforestry is one of them (Basak et al., 2009). Unfortunately Bangladesh is endowed with only 17.5% of unevenly distributed forests. In Bangladesh, different crops are cultivated in summer season. Among the different summer vegetables okra and bottle gourd are the important summer vegetables in Bangladesh (Khatun et al., 2009). These are well known and very popular vegetables grown successfully during summer season in Bangladesh. For identifying the compatible tree-crop combination, particularly under storey species i.e. different crops should be screened out in terms of their adaptability and yield in association with the early stage of tree. Therefore, it would be wise to conduct experiments under different tree crop or vegetable combination at different spacing for screening of different crops in terms of their growth and yield performance. The specific objectives of the study were to observe the performance of okra, and bottle gourd in association with Xylia dolabriformis tree and to observe interaction effect of Xylia dolabriformis tree on okra, bottle gourd.