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http://dx.doi.org/10.7732/kjpr.2016.29.4.504

Effects of Sowing Date on Agronomic Characteristics of Intermediate-erect Type Cowpea  

Kim, Dong-Kwan (Jeollanamdo Agricultural Research and Extension Services)
Lee, Kyung-Dong (Department of Oriental Medicine Materials, Dongshin University)
Rim, Yo-Sup (Department of Bio-Environmental Science, Sunchon National University)
Chung, Jung-Sung (Department of Agronomy, Gyeongsang National University)
Publication Information
Korean Journal of Plant Resources / v.29, no.4, 2016 , pp. 504-510 More about this Journal
Abstract
This study was investigated to find the effects of sowing time on growth and yields of cowpea grown in a southern region of South Korea. Experiments were carried out in Naju, Jeonnam Province (Latitude 35° 04' N, Longitude 126° 54' E) during 2013 and 2014. The intermediate-erect type strains used in this study were Jeonnam1 and Jeonnam2 (Okdang). Sowing time was performed between middle-April and middle-August at intervals of one month. The days from sowing to emergence was significantly higher in the middle-April sowing (12 days) time but there was no significant differences other sowing dates (5 to 3 days). The days from sowing to first flowering were shorter for sowing dates between middle-April and middle-July because sowing time was delayed and then were lengthened again at middle-August sowing; the days were longest at middle-April sowing (around 62 days) and were shortest at middle-July sowing (35 days). The days from first flowering to harvesting were short for the sowing dates between middle-April and middle-July (17 to 15 days) but were relatively long for middle-August sowing date (24 days). Stem length was relatively long for the middle-May and middle-June sowing dates. Peduncle length was relatively long for the middle-April sowing date. Main-stem node number was highest for the middle-July sowing. Branch number per plant was highest in the middle-April sowing. Seed yields were highest for the middle-April sown Jeonnam1 and the Jeonnam2 (Okdang) strains showing, 199 and 211 kg/10a, respectively, and then followed by sowing in middle-July, 191 and 195 kg/10a, respectively.
Keywords
Cowpea; Intermediate-erect type; Sowing date;
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Times Cited By KSCI : 4  (Citation Analysis)
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