Production Potential of Sweet Potato Based Intercropping System in Sylhet Region

M. Nazrul
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Abstract

A field experiment was conducted during two consecutive years 2017-18 and 2018-19 at farming system research and development (FSRD) site, under South Surma Upazilla of Sylhet in Bangladesh to find out the suitable crop combination for increasing total productivity, return and maximizing land utilization through intercropping. Five treatments viz. T1: Sweet potato + red amaranth, T2: Sweet potato + leaf amaranth, T3: Sweet potato + mustard green, T4: Sweet potato + mustard and T5: Sweet potato sole (100% sweet potato) were considered in the experiment. Results showed none of the intercrop-combination influenced the root yield of sweet potato. Tuberous root yield of sweet potato in 100% sweet potato + 100% mustard green combination was at per sweet potato sole cultivation. Sweet potato yield did not reduce significantly due to intercropping. The highest sweet potato equivalent yield (41.75 t ha-1), land equivalent ratio (1.37), gross return (Tk. 625950 ha-1), gross margin (Tk. 495500 ha-1) and benefit cost ratio (4.80) were recorded from sweet potato 100% + mustard green 100% combination. On the contrary, sweet potato sole gave the lowest sweet potato equivalent yield (30.60 t ha-1), gross margin (Tk.330300 ha-1) and benefit cost ratio (3.57). The results revealed that sweet potato 100% + mustard green 100% intercropped combination might be suitable for higher productivity and economic return. Bangladesh J. Agril. Res. 46(2): 123-131, June 2021
甘薯间作系统在锡尔赫特地区的生产潜力
在2017-18年和2018-19年连续两年在孟加拉国锡尔赫特南苏尔马乌帕兹拉农业系统研究与发展(FSRD)站点进行了一项田间试验,以找出通过间作提高总生产力、回报和最大化土地利用的合适作物组合。试验采用T1:甘薯+红苋菜、T2:甘薯+苋菜叶、T3:甘薯+芥菜绿、T4:甘薯+芥菜、T5:甘薯比目鱼(100%甘薯)5个处理。结果表明,间作对甘薯根系产量无显著影响。100%甘薯+ 100%芥菜绿组合的甘薯块根产量为每根甘薯。间作对甘薯产量的影响不显著。甘薯100% +芥绿100%组合的甘薯等效产量最高(41.75 t ha-1),土地当量比最高(1.37),总收益最高(625950 t ha-1),毛利率最高(495500 t ha-1),效益成本最高(4.80)。相反,甘薯比目鱼的甘薯当量产量最低(30.60 t hm -1),毛利率最低(k.330300 hm -1),效益成本比最低(3.57)。结果表明,甘薯100% +芥菜绿100%间作组合可获得较高的产量和经济效益。孟加拉国J. Agril。Res. 46(2): 123-131, 2021年6月
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