Effect of varied planting time and dehaulming on the yield potential, processing quality and economic benefit in potato

Abstract

A field experiment was conducted for producing higher processing grade tuber yield and quality by evaluating in relation to different planting times (31 October, 15 and 30 November) and dehaulming dates (80, 90 and 100 days after planting) during 2012-13 potato growing season at Bangladesh Agricultural Research Institute, Gazipur. Results revealed that different growth parameters like plant height, leaves number per hill and foliage coverage were significantly influenced by planting times. Processing and non processing grade tuber number and yield were significantly affected by all the treatments and their interaction. Significantly higher yield of processing grade tuber were recorded in November 15 planting in combination with all the dehaulming dates, ranged from 20.67 to 21.50 t/ha. Processing quality parameters like specific gravity, dry matter, reducing sugar content were significantly varied by planting times, dehaulming dates and their interaction. Whereas the potato chips colour score were not affected by the planting time and dehaulming but all the processing quality parameters were remained in acceptable range. The highest net return (Tk 1,68,404/ha) with a BCR of 1.93 was obtained in November 15 planting with dehaulming at 90 days after planting.

Production of disease free seed potato tuber through optimization of planting and haulm pulling time

“…After mid-February or 50-55 DAP the plants experienced higher temperatures than on other planting dates due to climatic conditions. The results are in line with the findings of Sandhu et al, (2012), Ezekiel and Bhargava (1992), Alam et al, (2017), Afsana (2018), andMonsor (2014).…”

“…The cumulative age of seed tubers was higher at late planting and more desprouting was needed before planting which was responsible for more sprouting and more stem per plant. As per the results of Alam et al, (2017), there was no significant influence on stem per hill by the early to late November dates of planting of potato. The stem number per plant differed based on very early planting time (Mid-October) with other planting times (November to Mid.…”

“…Alternatively, the early planting of potato on October 20 delayed emergences was reported by Bewuketun et al, (2015). Alam et al, (2017) stated that from 31 October to 30 November, planting time is suitable for the emergence of seed potato in Bangladesh due to favorable agro-climatic conditions.…”

“…Thus, it should be needed to fix the optimum planting time for higher seed potato yield. The planting time affected tuber quality (Haile et al, 2015;Alam et al, 2017), and influenced the emergence percentage, vegetative growth, tuber number, and also the yield of potato (Thongam et al, 2017). Likewise, farmers of Bangladesh harvested seed potato at different times which also influence the quality of seed potato.…”

“…In addition, various diseases are strongly correlated with planting time and haulm pulling time which is responsible for the quality of seed production in Bangladesh with existing climatic factors (Lutfunnahar et al, 2020). But the time of planting and haulm pulling can interact with the plant development and tuber size, quality, and yield of potato (Alam et al, 2017). Hence, the most important factors affecting of growth, yield, and quality of tubers are the planting and harvesting time (Nedunchezhihan and Byju, 2005).…”