ABSTRACT

A field experiment was conducted at the Bonpara field area near Natore town during the period from 10 February 2017 to 30 May 2018 to observe the performance (growth and yield) of Indian spinach and amaranth grown at different distances from the lohakat tree (Xylia sp.). Different treatments of the experiment were T1 (3 feet distance from tree), T2 (6 feet distance from tree) and 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. In indian spinach the highest value of yield (52.08 t/ha) was found under open field which was statistically similar to treatment T3 (9 feet distance from tree). In case of amaranth it was also found that open field also produced the highest yields (12.70 t/ha) which were statistically similar to treatment T3. The growth characters of lohakat tree (Xylia dolabriformis) tree are not satisfactory in association with indian spinach and amaranth at 9 feet distance from lohakat tree (Xylia dolabriformis) tree.
Key words: Performance, vegetables, indian spinach, amaranth.

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. Recently, some techniques have already been advocated to overcome future food challenges, vegetable agroforestry is one of them. The integration of tree and crop or vegetable on the same area of land is a promising production system for maximizing yield and maintaining friendly environment (Nair, 1990). In Bangladesh; different crops are cultivated in summer season. Among the different summer vegetables indian spinach and amaranth are the important summer vegetables in Bangladesh. These are well known and very popular vegetables grown successfully during summer season in Bangladesh. Indian spinach provides cool to the body, it prevents cough, asthma and its related diseases. Cooked amaranth grains are a complementing source of thiamine, niacin, riboflavin, and foliate, and dietary minerals including calcium, iron, magnesium, phosphorus, zinc, copper, and manganese- comparable to common grains such as wheat germ, oats and others. 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 indian spinach and amaranth in association with lohakat tree tree and to observe their interaction effects.