Response of garden pea to different level of irrigation and nitrogen fertilizer
Keywords:
Garden pea, irrigation, crop stages, nitrogen, gross margin, fresh pod yield and stover yield.Abstract
The experiment was conducted during 2017-18 to evaluate the effect of irrigation and nitrogen for enhancing the productivity and profitability of garden pea. The experiment consisted of five irrigation treatments viz., no irrigation, one irrigation at vegetative stage (15 days after sowing, DAS), one irrigation at flowering stage (30 DAS), one irrigation at pod developing stage (45 DAS) and two irrigations, one irrigation at vegetative stage (15 DAS) + one irrigation at pod developing stage (45 DAS) and five levels of nitrogen viz., 0, 20, 30, 40 and 50 kg N ha-1. The experiment was laid out in a spilt plot design with three replications assigning nitrogen doses in main plots and irrigation treatments in sub-plots. Garden pea variety ‘BARI Motorshuti-3’ was used in this study. The combined effect of irrigation at flowering stage and fertilization with 30 kg N ha-1 gave the highest green pod yield (7.57 t ha-1) and green stover yield (6.19 t ha-1), which was followed by no irrigation and fertilization with 30 kg N ha-1 that produced green pod yield of 7.54 t ha-1 and green stover yield of 6.12 t ha-1 in garden pea. According to cost and return analysis, among all the treatment combinations, no irrigation and fertilization with 30 kg N ha-1 was the best combination for enhancing gross margin (Tk. 448687.58 ha-1) and BCR (2.90) for maximum green pod yield. Irrigation at flowering stage coupled with 30 kg N ha-1 gave appreciable amount of gross margin (Tk 438363.40) and BCR (2.48) followed by the combination of irrigation at pod developing stage and 30 kg N ha-1 (gross margin: Tk 378018.40 and BCR: 2.42). Therefore, irrigation given at either at flowering stage (30 DAS) or pod developing stages (45 DAS) each in combination with 30 kg N ha-1 application is also a better combination for higher green pod production with better profitability under Bogura region when the crop needs to be irrigated.
Bangladesh J. Agril. Res. 50(2): 127-140, June 2025
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