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Proper Sowing Time and Planting Density of Intermediate-erect Type Cowpea Strains for Labor-Saving Cultivation

반유한 직립형 동부의 생력재배에 적합한 파종기 및 재식밀도

  • Kim, Dong-Kwan (Jeollanamdo Agricultural Research and Extension Services) ;
  • Kim, Yong-Soon (Jeollanamdo Agricultural Research and Extension Services) ;
  • Park, Heung-Gyu (Jeollanamdo Agricultural Research and Extension Services) ;
  • Kwon, Oh-Do (Jeollanamdo Agricultural Research and Extension Services) ;
  • Shin, Hae-Ryong (Jeollanamdo Agricultural Research and Extension Services) ;
  • Choi, Kyeong-Ju (Jeollanamdo Agricultural Research and Extension Services) ;
  • Lee, Kyung-Dong (Department of Oriental Medicine Materials, Dongshin University) ;
  • Rim, Yo-Sup (Collage of Bio Industry Science, Sunchon National Univ.)
  • Received : 2014.05.14
  • Accepted : 2014.08.18
  • Published : 2014.09.30

Abstract

The purpose of this study was to establish the proper sowing time and planting density of cowpeas for labor-saving cultivation. Experiments were carried out in Naju, Jeonnam Province (Latitude $35^{\circ}$ 04' N, Longitude $126^{\circ}$ 54' E) during 2012 and 2013. The intermediate-erect type strains used in this study were Jeonnam1 and Jeonnam2. Sowing was performed five times between June 25 and August 5 at approximately 10-day intervals in order to establish proper sowing time, and sowed at 5,000, 10,000, 15,000, and 20,000 plants per 10a to establish proper planting density. The days from sowing to first flowering was shortest (32 days) in plants sowed on July 25 and became longer for plants sowed on or around July 25. The days from sowing to first flowering was longest (41 days) in plants sowed on June 25. The days from first flowering to first maturing was shortest (8 days) in plants sowed on June 25 and, became considerably longer at later sowing dates. The days from first maturing to first harvesting ranged from 8 to 10 days, with little difference among the sowing periods. Plants sowed on August 5 harvested at the same time, and plants sowed between June 25 and July 25 were harvested either three or two times. The yield was highest in plants sowed on July 25: 209 kg/10a was harvested for Jeonnam1 and 221 kg/10a for Jeonnam2. Furthermore, harvested at the same time enabled when the harvesting was delayed for around 15 days because the share of the seeds first harvested was highest (91%). The proper planting density was estimated to be 15,000 plants/10a, showing the highest yields of 199 kg/10a for Jeonnam1 and 224 kg/10a for Jeonnam2.

본 연구는 동부 생력재배에 적합한 파종기와 재식밀도를 설정하고자 전남 나주(위도 $35^{\circ}$ 04'N, 경도 $126^{\circ}$ 54'E)에서 2012년과 2013년에 수행하였다. 시험 계통은 반유한 직립형인 전남1호와 전남2호를 이용하였다. 적정 파종기 설정을 위해 6월 25일부터 8월 5일까지 약 10일 간격으로 5회 파종하였다. 적정 재식밀도 설정을 위해 10a당 5,000, 10,000, 15,000, 20,000본씩 파종하였다. 1. 개화일수는 7월 25일 파종에서 32일로 가장 짧았고, 7월 25일 파종을 전후하여 길어져 6월 25일 파종에서는 41일로 가장 길었다. 2. 개화시에서 성숙시까지의 소요일수는 6월 25일 파종에서 8일로 가장 짧았고, 이후 파종이 지연됨에 따라 급격하게 길어지는 경향이었다. 반면에 성숙시에서 1차 수확기까지의 소요일수는 8~10일의 범위로 파종기간 차이가 적었다. 3. 8월 5일 파종에서는 일시 수확이 가능하나, 6월 25일부터 7월 25일 파종에서는 3~2회 수확되었다. 4. 수량은 7월 25일 파종에서 전남1호 209 kg/10a, 전남2호 221 kg/10a로 가장 많았다. 뿐만 아니라 1차에 수확한 종실의 점유율이 91%로 높기 때문에 수확기를 15일 가량 미루면 일시수확이 가능하다. 5. 적정 재식밀도는 수량이 전남1호 199 kg/10a, 전남2호 224 kg/10a로 가장 많은 15,000 본/10a 내외로 판단된다.

Keywords

References

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  2. 품종 및 파종시기별 동부의 품질 및 이화학 특성 vol.31, pp.4, 2018, https://doi.org/10.9799/ksfan.2018.31.4.502