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아스파라거스 지상부 친경 제거시기가 익년도 수량에 미치는 영향
손동모,김효중,정종모,김성준,김병삼,윤봉기,이정현 全南大學校 農業科學技術硏究所 2016 農業科學技術硏究 Vol.53 No.-
This study was conducted to investigate the effect of the mother stem removal period on the above-ground part of the asparagus stem in the non-heated greenhouse of Jeonnam Agricultural Research & Extension Service on the quantity of spear in the following year. For the test variety, ‘Super Welcome’ (Sakata, Japan) was notified, and for the removal period of the mother stem on the above-ground part of the stem, it was set as green leaf period, yellow leaf period and dead leaf period according to the change in the stem & leaf color to be treated. As a result of comparing the average temperature for 15 days before removing the stem & leaf that just came up, the temperature was lower when the sulfuration level was more severe and the removal period was more delayed. Especially, the dead leaves that were removed in late December showed minimum temperature of 0.9℃ and daily average temperature of 7.2℃ to be 3.5℃ lower than the yellow leaf period (10.7℃). For the initial harvesting date for each treatment, the yellow leaf period and the dead leaf period were February 17, 2015 to be 5 days earlier than February 22 of the green leaf period. As for the number of harvesting days, the green leaf period was 175 days, and the yellow leaf period and the dead leaf period were 180 days to have 5 days difference, but the harvesting frequency was 87~88 times for all three periods to have no difference between the treatments. In the growth & development of the mother stem of above-ground stem for each treatment, the plant height and the number of stems were 190㎝ and 8.0EA in the dead leaf period to be the longest and highest in number, and the stem diameter was 15.3mm in the yellow leaf period to be the thickest. For the characteristics of the harvesting spear for each above-ground removal period, the number of spear per week was 42.8EA in the green leaf period, 44.8EA in the yellow leaf period, and 44.9EA in the dead leaf period. For the spear diameter, the thickest was 16.2mm in the dead leaf period, followed by 15.9mm in the green leaf period, and 15.7mm in the yellow leaf period. As for the average spear weight per 1EA, the dead leaf period showed 30.2g to have the most weight, followed by 28.4g in the yellow leaf period, and 28.0g in the green leaf period. For the quantity of spear per 10a for each treatment, the dead leaf period showed 1,510kg to have 7% increase compared to 1,399kg in the yellow leaf period, but in the green leaf period where the current of nutrients from the stem was not enabled appropriately, it decreased 6% to 1,331kg. As seen in the results shown above, it is considered that removing the stem in the period between the yellow leaf and the dead leaf, where the nutrients from above-ground are completely flowed to the underground stumps by the decrease in temperature without disease and insect pest is favorable in the nutrient management when harvesting in long-term in spring and summer at Jeonnam region on the following year.
여주 봄 작형의 재배방법과 정식기가 생육과 수량에 미치는 영향
손동모(Dong-Mo Son),김성준(Seong-Jun Kim),김효중(Hyo-Joong Kim),김희곤(Hee-Gon Kim),윤봉기(Bong-Ki Yun),정종모(Jong-Mo Jung),이정현(Jeong-hyun Lee) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.3
This study was conducted in order to investigate the effects that the difference of planting time by a method of cultivation in the non-heated greenhouse and the open field with spring planting had on growth and yield. With regard to the tested variety of Momordica charantia, variety ‘Dragon’ (Japan Yae 農藝) was selected. And 3 treatments on March 20, April 5 and April 20 for the greenhouse cultivation and 3 treatments on April 20, May 5 and May 20 for the open-field cultivation 1 month later than those for the greenhouse cultivation were planted by the randomized complete block design, and 4 secondary vines were trained. In the results of examining 15-day average atmospheric temperature after planting according to the methods of greenhouse and open-field cultivation and planting time, it was shown that there was a tendency for atmospheric temperature inside the greenhouse to decrease as the planting time was moved up. In particular, the average atmospheric temperature was 16.7℃ when seedling was planted on April 20 in the open-field cultivation, which was approximately equal to 17.0℃ of the average atmospheric temperature when a seedling was planted on March 20 in the greenhouse cultivation. With regard to the date of first harvest by the method of cultivation, it was shown that there was a tendency for the date of first harvest to be earlier in the greenhouse cultivation than in the open-field cultivation, and the date of first harvest was moved up as a seedling was planted earlier for the planting period. The number and weight of harvested fruits per plant showed a tendency which was almost similar to that of total number of harvest days and number of harvests. Thus, the number of fruits was 189 and the weight of fruits was 31,649g in case of the greenhouse cultivation and planting on March 20, which were maximum. In case of planting on the latest planting date : May 20 in the open-field cultivation, the number of fruits was 77 and the weight of fruits was 12,502g, which were at a level of 40% of those of planting on March 20 in the greenhouse cultivation 2 months earlier. The total yield per 10a was 10,228kg in the greenhouse cultivation and was 2.2 times as heavy as 4,607kg in the open-field cultivation with regard to the method of cultivation. For the planting period in the greenhouse cultivation, it was 10,539kg and 10,517kg in planting on March 20 and April 5, which was higher by 9% than 9,629kg in planting on April 20. And in the open-field cultivation, it was 4,785kg in planting on April 20 and 4,872kg in planting on May 5, which was higher by 15~17% than 4,163kg in planting on May 20. Taking the above results into account, it is considered proper to plant Momordica charantia from March 20 to April 5 for the greenhouse cultivation and from April 20 to May 5 or thereabouts when a risk of late frost is gone for the open-field cultivation in southern area.