Growth Responses as Affected by Different Ion Strengths of Nutrient Solution with Growth Stage of Hydroponically GrownDendranthema grandiflorum cv. Chungwoon

생육 단계별 배양액 농도 관리에 따른 국화의 생육 반응

Hwang, In-Taek;Cho, Kyung-Cheol;Kim, Kwang-Soo;Chung, Soon-Ju;Ahn, Kyu-Bin
황인택;조경철;김광수;정순주;안규빈

  • Published : 20030000

Abstract

This study was conducted to investigate the effects of different ionic strengths of nutrient solution on the growth and development of hydroponically grown chrysanthemum cv. Chungwoon. The strength of nutrient solution was appled differently at three stages, namely, transplanting, budding, and flowering. Nine treatments were investigated: (A) 1.0$\rightarrow$1.0$\rightarrow$1.0$\times$ , (B) 1.0$\rightarrow$1.3$\rightarrow$1.3$\times$ , (C) 1.0$\rightarrow$1.6$\rightarrow$1.6$\times$ , (D) 1.3$\rightarrow$1.0$\rightarrow$1.0$\times$ , (E) 1.3$\rightarrow$1.3$\rightarrow$1.3´$\times$ , (F) 1.3$\rightarrow$1.6$\rightarrow$1.6$\times$ , (G) 1.6$\rightarrow$1.0$\rightarrow$1.0´$\times$ , (H) 1.6$\rightarrow$1.3$\rightarrow$1.3$\times$ , and (I) 1.6$\rightarrow$1.6$\rightarrow$1.6$\times$ . The plant growth in terms of plant height, number of leaves, and leaf area was better in ionic strength of 1.3 and 1.6 times in each stage than in the constant value of 1.0. Flower diameter of 8.9 cm was the highest in 1.6 strength in all stages. Fresh and dry weights were greatest in the F treatment. Contents of total nitrogen and Ca in the leaf were highest in 1.6 time in all stages, showing 3.33 and 9.02%, respectively. P content of 1.16% in the leaf was the highest in 1.3 strength during the trans plating stages and 1.6 strength during the budding and flowering stages. As a result, increasing ionic strength of nutrient solution at three stages are most effective in hydroponic chrysanthemum production using rice hull as media.

본 연구는 국화의 생육 단계별 적정 양액 농도를 구명하기 위해 생육 단계를 3단계로 나누어 상이한 양액 농도를 처리하였다. 생육 단계별 양액 농도를 정식부터 착뢰기, 개화기까지 3단계로 나누어 A처리 : 1.0배→1.0배→1.0배, B처리 : 1.0배→1.3배→1.3배, C처리 : 1.0배→1.6배→1.6배, D처리 : 1.3배→1.0배→1.0배, E처리 : 1.3배→1.3배→1.3배, F처리 : 1.3배→1.6배→1.6배, G처리 : 1.6배→1.0배→1.0배, H처리 : 1.6배→1.3배→1.3배, I처리 : 1.6배→1.6배→1.6배로 공급하였다. 생육 초기, 중기, 후기에 1.0배의 표준 농도를 공급한 것보다 농도를 생육 단계별로 1.3와 1.6배로 처리해 주었을 때 생장이 좋았다. 초장과 엽수는 생육 중기와 후기에 1.3배의 농도로 양액을 공급하였을 때 다른 처리보다 양호하였다. 엽면적은 전 생육 과정을 1.3배로 공급하였을 때 1,388cm2/plant로 가장 넓었다. 꽃의 직경은 전 생육 기간 동안 1.6배로 공급해 주었을 때 8.9cm로 가장 컸다. 생체중과 건물중은 생육 초기 1.3배, 중기와 후기에 1.6배 농도로 처리 시 가장 무거웠다. 잎의 무기물 함량 중 전질소와 칼륨의 함량은 전 생육 기간 동안 1.6배의 농도로 공급해 주었을 때 각각 3.33와 9.02%로 가장 많았다. 인산 함량은 생육 초기 1.3배, 중기와 후기에 1.6배로 처리 시 1.16%로 높았다. 따라서, 왕겨 배지를 이용한 국화 양액 재배 시 일정한 표준 농도보다는 생육 단계에 따라 양액 농도를 생육 초기 1.3배, 중기와 후기에 1.6배 농도로 변환하여 공급하는 것이 국화 생육에 효과적인 것으로 확인되었다.

Keywords

References

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