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배 ‘신고’의 연차간 과실 생장과 기상 요인과의 상관성
한점화(Jeom Hwa Han),손인창(In Chang Son),최인명(In Myeong Choi),김승희(Seung Heui Kim),조정건(Jung Gun Cho),윤석규(Seok Kyu Yun),김호철(Ho Cheol Kim),김태춘(Tae-Choon Kim) 한국원예학회 2013 원예과학기술지 Vol.31 No.1
This research was conducted to investigate the effect of climatic factors on fruit growth in ‘Niitaka’ pear (Pyrus pyrifolia). For ten years from 2000 to 2010, average full bloom date was April 19th and standard deviation was 4.2 days. Average fruit diameter 160 days after full bloom (DAFB) was 102.4 mm and standard deviation was 7.5 mm. Variance coefficients among climatic factors were higher in rainfall amount and sunshine hours than temperature. Only sunshine hours of climatic factors accumulated during the 160 DAFB had significant positive relationship (r = 0.68<SUP>*</SUP>) with fruit diameter 160 DAFB. Between full bloom date and fruit diameter 160 DAFB had no significant relationship. Fruit growth in 2004, as continuous rain fall and short sunshine hours, showed opposite pattern compared to that in 2009. Therefore, fruit growth of ‘Niitaka’ pear was more fluenced by the accumulated sunshine hours than accumulated temperature.
배 '신고' 의 만개일 및 생육기 기상을 이용한 수확일 예측
한점화(Jeom Hwa Han),손인창(In Chang Son),최인명(In Myeong Choi),김승희(Seung Heui Kim),조정건(Jung Gun Cho),윤석규(Seok Kyu Yun),김호철(Ho Cheol Kim),김태춘(Tae-Choon Kim) 한국원예학회 2011 원예과학기술지 Vol.29 No.6
The effect of full bloom date and growing season weather on harvesting date of Niitaka pear (Pyrus pyrifolia) in Naju province and the model of multiple linear regression for predicting the fruit growing days was studied. Earlier year in full bloom date, the harvesting date tended earlier but fruit growing days tended longer. Mean and coefficient of variation of fruit growing degree days (GDD) accumulated daily mean and maximum temperature at the base of 0℃ from full bloom date to harvesting date was 3,565, 2.9% and 4,463, 2.5%, respectively. Fruit growing days was not correlated with the fruit GDD accumulated daily mean and maximum temperature at the base of 0℃ in each month but highly correlated with GDD accumulated daily meteorological factors at days after full bloom date. Especially, it was highly negatively correlated with GDD accumulated daily mean and maximum temperature at the base of 0℃ from 1st day after full bloom to 60th day. The determination coefficient (r<SUP>2</SUP>) of multiple linear re gression model by full bloom date, GDD accumulated daily mean and maximum temperature from 1st day after full bloom to 60th day for predicting fruit growing days was 0.7212. As a result, the fruit growing days of ‘Niitaka’ pear in Naju province can predict with 72% accuracy by the model of multiple linear regression.
조기낙엽이 사과 `시나노스위트`의 수량, 저장양분 및 꽃눈형성에 미치는 영향
한점화(Jeom Hwa Han),한현희(Hyun Hee Han),권용희(Yong Hee Kwon),정재훈(Jea Hoon Jung),류수현(Su-Hyun Ryu),도경란(Kyeong Ran Do),이한찬(Han-Chan Lee),최인명(In Myeong Choi),김태춘(Tae-Choon Kim) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.2
우박 및 태풍에 의해 생육기간 동안에 낙엽이 발생했을 때를 가정하여 5월부터 10월까지 1개월 간격으로 인위적으로 낙엽 처리를 실시하고 그에 따른 사과나무 ‘시나노스위트’의 수량, 저장양분 및 다음해 화총 수에 미치는 영향을 조사하였다. 평균 과중은 낙엽 정도가 심할수록, 낙엽 시기가 빠를수록 감소하였으며 과실 비대 감소는 수량 감소로 이어졌다. 30% 낙엽구의 과실 크기 및 수량은 낙엽 시기와 관계없이 무처리구와 유의한 차이를 보이지 않았다. 2년생 가지의 탄수화물 함량은 8월 이전 낙엽구가 9월이후 낙엽구에 비해 현저히 낮은 함량을 보여 낙엽 정도보다는 낙엽 시기의 영향이 컸다. 8월 이전 낙엽구 중에서는 낙엽 시기가 늦어질수록 탄수화물 함량이 감소하여 8월 낙엽구에서 무처리구 대비 50% 수준으로 가장 낮았다. 생육기 중의 조기 낙엽 다음해 화총 수는 낙엽 시기 및 정도에 따라 큰 차이를 보였다. 5월 이후 낙엽 시기가 늦어질수록 화총 수가 감소하여 7월 낙엽구에서 가장 낮은 화총 수를 보였으며 8월 이후 낙엽구는 무처리구와 큰 차이를 보이지 않았다. 낙엽 이듬해 화총수는 수체내 탄수화물 함량과 정의 상관을 보였다. 위의 결과, 7월 이전의 낙엽 피해가 발생되었을 때에는 적과를 통해 개별 과실의 sink 기능을 강화하여 과실 비대를 향상시키고, 저장양분 확보를 통해 다음해 화총 수를 확보하는 것이 필요할 것으로 판단된다. ‘Sinano Sweet’ apple trees were defoliated at intervals of a month from May to October to simulate damage occured by hail and typhoon in Korea, accordingly fruit yield, reserve accumulations and return bloom were investigated. As the more severe defoliation degree was and earlier defoliation time was, fruit weight and fruit yields were more decreased. Fruit weight and yields of 30% defoliated trees, regardless of the defoliation time, showed no significant difference with those of control. Because carbohydrate contents of the 2-year old branches defoliated before August were even lower than those of branches defoliated after September, it was considered that defoliation time is more effective on the carbohydrate content than defoliation degree. Among the trees defoliated before August, 50% defoliated trees at August contained the lowest carbohydrate by 50% of control. Time and degree of defoliation had an effect on the number of flower buds following year. The number of return bloom in trees defoliated from May to July was decreased by delay of defoliation time and was the lowest in trees defoliated at July. On the other hand, it was not have a significant different between control and trees defoliated since August. Relationship between the number of return bloom and carbohydrate reserves showed positive correlation. As a result, it is considered that fruit thinning, when defoliation occurred in the growing season, needs for strengthening the sink function of remained individual fruit effect on fruit enlargement and for increaseing the carbohydrate reserve effect on return bloom.