Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

Effect of Different Degrees of Defoliation on Fruit Quality, Reserve Accumulation and Early Growth of Young Fuyu Persimmon

적엽 수준이 '부유' 단감의 과실 특성, 저장양분 축적 및 익년 초기 생장에 미치는 영향

Park, Soo-Jeong
박수정

  • Published : 20020000
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Abstract

The study was conducted to find the effect of different degrees of defoliation on dry weight, fruit quality, and reserve accumulation with 3-year-old Fuyu trees grown in 30-L pots. Also, the impact of defoliation on the tree growth in the following year was studied. Leaves were 0, 50, and 100% defoliated on October 1, 1999. Different degrees of defoliation did not affect dry weight of roots, old woods and shoots measured on November 10 to the level of statistical significance. However, dry weights in perennial parts tended to decrease as percent defoliation increased. The fruits from 100% defoliated trees were smaller in size, less sweet and poorly colored than those from 0 and 50% defoliated trees. As percentages of defoliation increased, nonstructural carbohydrates tended to decrease in roots, old woods and shoots. The roots of 0% defoliated trees contained greater than 1.9-fold more soluble sugars, and 2.2-fold more starch than those of 100% defoliated trees. As percent defoliation increased, new shoot growth in the following year decreased. During the period of new growth in the following year, dry weight of root decreased by 33% to 63%.

노화기 동안 적엽 수준이 30L pot에 재식한 3년생 ‘부유’ 단감의 수체 부위별 건물중과 과실 특성, 저장양분의 축적에 미치는 영향을 밝히고, 이러한 변화가 익년의 나무 발육에 어떤 결과로 나타나는지를 비교하고자 본 연구를 수행하였다. 1999년 10월 1일에 잎을 0, 50, 그리고 100% 수준으로 적엽하였다. 11월 10일 뿌리, 2년생 이상의 가지, 신초 건물중은 노화기 동안 적엽 처리에 따른 유의적인 차이가 없었으나 이들 영구기관의 건물중은 적엽이 증가할수록 감소하였다. 과실은 100% 적엽구가 0과 50% 적엽구보다 건물중이 작고, 당도와 색도가 낮았다. 적엽이 증가할수록 뿌리, 2년생 이상의 가지, 신초의 탄수화물이 감소하는 경향을 보였다. 특히 뿌리에서 0% 적엽구는 100% 적엽구보다 가용성 당은 1.9배, 전분은 2.2배 높았다. 전년도 적엽이 증가할수록 이듬해 새로운 생장과 건물중이 감소하였다. 이듬해 신초생장과 결실기 동안 뿌리의 건물중 감소가 현저하였는데, 그 범위가 33%에서 63%에 달하였다.

Keywords

References

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