Jongsoo Ryu
National Institute of Crop Science, RDA, Miryang, Republic of Korea
Title: Variability of yield components of adzuki bean(Vigna angularis(willd.) Ohwi & Ohashi)) cultivars as affected by change of sowing time.
Biography
Biography: Jongsoo Ryu
Abstract
Generally, it is advantageous for machine harvesting using combine that crops have upright type. Upright type adzuki beans are those varieties that were developed for machine harvesting and it has high processing efficiency. And, it is urgent improve of existing cultivation method for high-reliability production in new plant type crops. In the existing research, the planting spacing of the upright type of adzuki beans and the contrast varieties are as follows; Chungju : 70 × 20 cm, Arari : h 70 × 15 cm, and Hongen : 70 × 10 cm. Based on previous studies, here in study, we tried to find the proper sowing time for stable production of upright type red beans and contrast varieties. The sowing time was investigated at 5 levels in 2015, and 6 levels in 2016 (including additional tests). The investigation was based on the growth characteristics and yield components. The results showed that late sowing time had significant negative effects the tested varieties of red bean, relative to stem length, stem thickness, pod no. per plant, seed no. per plant. However, the lodging was decreased and increased during in one hundred seed weight. The sowing time showed a sensitive reaction to the change of weather in the cultivation environment. The highest yield quantity was found in case of sown on June 25 in each variety. Looking at these results, cultivation of adzuki bean at southern region in South Korea is basically based on the optimum sowing time, which can be from 20th June to 30th June as of June 25th for stable production of beans.