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2019 Vol.64, Issue 1 Preview Page

Original Research Article

Effect of Planting Density on Growth and Yield Components of the Sweet Sorghum Cultivar, ‘Chorong’

재식밀도가 ‘초롱’ 단수수의 생육 및 수량구성요소에 미치는 영향

Young Min Choi1
,
Hyun-Ah Han1
,
So-Hee Shin1
,
Byong Soo Heo1
,
Kyu-Hwan Choi1*
,
Suk-Ju Kwon2
최 영민1
,
한 현아1
,
신 소희1
,
허 병수1
,
최 규환1*
,
권 석주2
1Junior Scientist, Crops & Food Division, Jeollabuk-do Agricultural Research and Extension Services, Iksan 54591, Korea
2영문소속Senior Scientist, Crops & Food Division, Jeollabuk-do Agricultural Research and Extension Services, Iksan 54591, Korea
1전라북도농업기술원 작물식품과 농업연구사
2전라북도농업기술원 작물식품과 농업연구관
*Corresponding Author
31 March 2019. pp. 40-47
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Abstract

This study was conducted to investigate the effect of planting density on plant growth, yield, and quality in the sweet sorghum cultivar ‘Chorong’ (Sorghum bicolor (L.) Moench). Plants were cultivated at densities of 16.7, 11.1, 8.3, 6.7, and 5.6 plants·m-2. Factors related to yield and yield components were analyzed using correlation and multivariate analyses. There was no significant difference among plant densities in stem length from 20 to 110 days after sowing. But the stem diameter was thin, and a decrease in number of tillers occurred more rapidly as planting density increased. At harvest, juice and sugar yield were higher at densities of 16.7 (42.9, 4.16 Mg·ha-1, respectively) and 11.1 (37.1, 3.73 Mg·ha-1) plants·m-2 than at 8.3 (30.5, 2.96 Mg·ha-1), 6.7 (26.6, 2.41 Mg·ha-1), and 5.6 (24.7, 2.22 Mg·ha-1) plants·m-2. The soluble solids and total sugar contents were not different among treatments, but relatively high values were observed at the density of 11.1 and 8.3 plants·m-2. As plant density was increased from 5.6 to 11.1 plants·m-2, the lodging index (1 = no, 9 = lodging) increased rapidly from 2.00 to 6.33. To determine the optimal planting density, the number of typhoons and topographical characteristics should be considered. Correlation and principal components analyses revealed that plant density exhibited a positive relationship with fresh stem yield (r = 0.62**), dry stem yield (r = 0.58**), juice (r = 0.63**), and sugar yield (r = 0.66**), but a negative with stem diameter (r = -0.65**). The yield factors were not statistically related to stem height, diameter, and number of nodes.

Keywords
fresh stem yield
lodging
multivariate analysis
number of additional tillers
soluble solids content
sugar yield
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 64
  • No :1
  • Pages :40-47
  • Received Date : 2019-02-22
  • Revised Date : 2019-03-07
  • Accepted Date : 2019-03-08
  • DOI :https://doi.org/10.7740/kjcs.2019.64.1.040
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