Abstract
Optimizing irrigation frequency and intra row spacing for specific environment is one the major agronomic practices to improve productivity of haricot bean. Hence, a field experiment was conducted to evaluate the effect of irrigation frequency and intra row spacing on growth, nodulation and agronomic performance of haricot bean at Arba Minch during dry season of 2018/19. The treatments consisted of three levels of irrigation frequency based on IW/CPE ratio (0.5, 0.67 and 1.0) with irrigation depth of 60 mm and three intra row spacing (6, 10 and 14 cm) which were factorially arranged in split plot design with three replications. Data were collected on phenological, nodulation, growth, yield and yield related parameters of the crop. The measured parameters were subjected to analysis of variance using SAS software version 9.0. Among the measured parameters, plant height, pod number per plant, dry matter and seed yield were significantly influenced by interaction effect of the treatments. The maximum seed yield (2873.7 kg ha−1) was recorded with interaction effect of irrigation at IW/CPE of 1 and intra row spacing of 10 cm. As for economic analysis, the same treatment combination also resulted in the highest net benefit (11254.1 Ethiopian Birr ha−1) and marginal rate of return (422.1%). Therefore, it could be concluded that irrigating haricot bean at IW/CPE ratio of 1 and planting at 10 cm intra row spacing could maximize both seed yield and economic benefit of the crop in the study area.
Highlights
Haricot bean (Phaseolus vulagris L.) is an annual crop belonging to the family Fabaceae [1] which is grown predominantly by smallholder producers as a source of food and cash in Ethiopia [2]
The treatments consisted of three levels of irrigation frequency based on IW/CPE ratio (0.5, 0.67 and 1.0) with irrigation depth of 60 mm and three intra row spacing (6, 10 and 14 cm) which were factorially arranged in split plot design with three replications
The treatments consisted of three levels of irrigation frequency (I1, I2 and I3 corresponding to IW/CPE ratio of 0.5, 0.67 and 1.0) and three levels of intra row spacing (6, 10, and 14 cm), which were factorially arranged in split plot design with three replications
Summary
Haricot bean (Phaseolus vulagris L.) is an annual crop belonging to the family Fabaceae [1] which is grown predominantly by smallholder producers as a source of food and cash in Ethiopia [2]. The productivity of the crop around the study area (15.7 kg ha−1) is reported to be below the national average productivity (17.0 kg ha−1) [3]. Frequency of irrigation which is largely dependent on crop type, soil and climate is reported to significantly affect grain yield of haricot bean [5]. Intra row spacing has great effect on productivity of haricot bean by affecting its growth and yield components [6]. A number of farmers are producing haricot bean besides tomato and onion to fill food gap and generate income by using irrigation during dry season. This study was intended to evaluate the effect of irrigation frequency and intra row spacing on growth, nodulation, yield and yield components of haricot bean at Arba Minch
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