• 생물환경조절학회지
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• 제24권3호
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• pp.173-177
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• 2015

본 시험은 여주의 봄 무가온 하우스내 입체재배시 적정 재식밀도를 구명하고자 수행하였다. 재식밀도는 $235plants{\cdot}10a^{-1}$, $305plants{\cdot}10a^{-1}$, $380plants{\cdot}10a^{-1}$의 3처리로 하였으며 '에라부' 품종을 이용하여 3월 26일 정식하였다. 유인방법은 어미 줄기를 적심하고 아들 줄기를 6개로 유인하였다. 시설 내 광도는 재식밀도가 높을수록 낮아졌으며 순 광합성율도 41-71% 정도로 유의하게 낮았다. 재식밀도에 따른 과일 특성에서는 차이를 보이지 않았으나 재식밀도가 낮을수록 주당 근중과 수확 과수는 증가하였다. 평균 과중은 $305plants{\cdot}10a^{-1}$ 처리구에서 338.7g으로 가장 무거웠으며 $235plants{\cdot}10a^{-1}$ 처리구에서 285.2g으로 가장 가벼웠다. 총 수량은 $305plants{\cdot}10a^{-1}$ 처리구에서 $5,393kg{\cdot}10a^{-1}$로 가장 많았으며 $235plants{\cdot}10a^{-1}$ 처리구에 $4,068kg{\cdot}10a^{-1}$로 가장 적었다. 상품과의 수량도 $305plants{\cdot}10a^{-1}$ 처리구에서 $4,767kg{\cdot}10a^{-1}$으로 재식밀도 $235plants{\cdot}10a^{-1}$에 비하여 24%, $380plants{\cdot}10a^{-1}$에 비하여 13% 정도가 증가되었다. 따라서 무가온 하우스내 입체 재배시 적정 재식밀도는 $305plants{\cdot}10a^{-1}$ 정도가 적당할 것으로 판단된다.

• 한국초지조사료학회지
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• 제25권4호
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• pp.239-244
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• 2005

본 시험은 옥수수 재식밀도 low(67,000 plants/ha), control(89,000 plants/ha) 및 high(95,000 plants/ha)를 주구로, 질소 시비량 150, 200 및 250kg/ha을 세구로 하여 분할구 배치법 3반복으로 2001년부터 2002년까지 2년간 축산연구소 한우시험장에서 수행하였다. 옥수수의 간장은 재식밀도가 낮을 수록 길었고, 모든 주처리구에서 ha당 200kg의 질소 시용구에서 길었으나 처리구간에 유의성은 인정되지 않았다. 또한 옥수수의 착수고는 재식밀도가 높아질수록 낮았으며, ha당 150 kg 시용구에서 가장 낮았으나 유의적인 차이는 나타나지 않았다. 옥수수의 암이삭 비율은 재식밀도가 낮을 수록 높아지는 경향이고 질소시비 수준은 ha당 200kg이 높았다(P<0.05). 옥수수의 건물수량은 재식밀도가 높아짐에 따라 증가를 하는 경향이었으나 유의적인 차이는 보이지 않았고 재식밀도에 따라 질소시비 수준은 차이를 보였다(P<0.05). 옥수수의 조단백질 함량은 큰 차이는 없었으나 높은 재식밀도와 낮은 질소시비 수준으로 가장 높은 경향이었다. NDF와 ADF 함량은 낮은 재식밀도와 200kg/ha이 가장 높았다. 이상의 결과를 종합하여 건물수량과 사료가치를 고려하여 보면 고랭지에서 낮은 재식밀도(67,000 plants/ha)와 ha당 150-200kg의 질소시비 수준이 적당할 것으로 생각된다.

• 한국환경농학회지
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• 제42권3호
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• pp.239-252
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• 2023

Most apple trees in South Korea are grafted on M.9 and M.26 rootstocks; however, these rootstocks are susceptible to fire blight. Although M.7 rootstocks are moderately resistant to fire blight, they tend to exhibit excessive vigor, which is unsuitable for high-density planting, unless weak cultivars are used. This study investigated the vegetative growth, yield, and fruit quality of apple trees grafted onto M.7, M.9, or M.26 rootstocks to assess the feasibility of establishing high-density apple orchards domestically using the M.7 rootstock a period of seven years (1-7 years after planting). Rootstocks were tested using three cultivars with contrasting induced vigor and harvesting times: vigorous and late-maturing 'Fuji,' moderate vigor and middle-maturing 'Hongro,' and low vigor and early-maturing 'Sansa.' The planting density was maintained constant, with 190 trees per 10 a. Primary thinning (leaving only the king fruit on clusters) was performed, whereas secondary thinning (controlling crop load) was not. Vegetative growth, accumulated yield per 10 a, and yield efficiency varied depending on cultivars and rootstocks; however, the cultivars had a more notable effect on fruit quality than the rootstocks. Biennial bearing often occurred in the M.26 rootstock. 'Fuji'/M.7 was overly vigorous for high-density planting. The fruit quality and accumulated yield per 10 a of M.7 were similar to those of M.9 with the 'Hongro' and 'Sansa' cultivars. In particular, 'Hongro'/M.7 did not show tree vigor reduction due to heavy crop load, and the degree of biennial bearing in 'Sansa'/M.7 was not particularly high. These results indicated that high-density apple planting using the M.7 rootstock was achievable using the 'Hongro' and 'Sansa' cultivars.

• 한국자원식물학회지
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• 제20권4호
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• pp.304-308
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• 2007

본 연구는 골풀의 본답재배에서 시비량과 재식밀도 차이가 수량구성요소와 수량에 미치는 영향을 검토코자 시험하였다. 그 결과 시비량에서는 $N-P_{2}O_{5}-K_{2}O(kg/10a)=80-20-40$구가 재식밀도에서는 $20{\times}10cm$와 $20{\times}15cm$ 처리에서 경장과 경수에서 우수하였고 건경 수량과 건경 품질에서도 우수하였다.

• 한국작물학회지
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• 제35권1호
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• pp.73-82
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• 1990

새로 육성된 단경종콩의 재식밀도와 시비량 차이가 생육 저형질 및 수량에 미치는 영향을 구명하기 위하여 수행한 시험결과를 요약하면 다음과 같다. 1. 분지수는 관행재식거이인 60$\times$10cm 보다 밀식인 30$\times$15cm에서 감소를 가져오지 않고 개체당분지수가 적어 분지보다 주경에 의존하는 밀식적응성 품종의 특성을 보였다. 2. 절위별 협수는 단경콩이 재식거리에 따라 차이가 있었으나 팔달콩은 재식거리 20$\times$10cm를 제외하고 큰 차이가 없어 밀식적응성이 컸다. 3. 절위별 협당립수는 재식거리 및 품종에 관계없이 상위절위에서 많았고, 절위별 협수나 립수는 중위절에서 변이폭이 작았다. 4. 재식거리에 따른 LAI의 변화는 밀도가 증가함에 따라 점차 증가되었다. 5. 소식에 비해 밀식할수록 주당립수는 적었으나 단위면적당 립수가 늘어 증수되었으며 다수확을 위한 적정재식거리는 25$\times$10cm였다. 6. 근류착생은 무시비구에서 많았으며, 단경콩이 팔달콩보다 많아 질소무시용구에서 질소고정 능력이 큼을 시사하였다. 7. 수량은 3요소시용구 대비 인산 > 가리 > 질소 무시용구 순으로 감수폭이 적었고 질소무시용구는 근골착생량이 많은 단경콩이 팔달콩보다 적게 감수되었다.

• Plant Resources
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• 제4권1호
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• pp.6-12
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• 2001

Growth and yield of licorice were investigated under the different conditions of ridge height, planting density, and irrigation in order to establish its cultural practices for the domestic production with the aim to substitute the import. Seedlings were grown under low ridge(20cm) and high ridge(40cm) in low density plot(60$\times$30cm) and high density plot(40$\times$30cm), respectively. The low ridge cultivation of large seedlings increased plant height and root length under low density, and stem and root diameter under high density compared to the high ridge cultivation. In the high ridge cultivation, high density plot was 1.1 to 1.3 times in plant height, root length, stem and root diameter as high as low density one. Fresh and dry weight of plant and root in high ridge were 1.3 to 1.5 times as high as those in low one. The growth of small seedlings(4~10g) were generally poor compared to that of large seedlings. High density plot in low ridge showed the good growth characteristics including plant height, root length, stem and root diameter, and number of branch. High density plot was 1.4 to 1.6 times in fresh and dry weight of plant and root as high as low density plot. In the seasonal changes of growth under various irrigation regimes, the twice irrigation a day produced the more number of leaf than the other regimes since around 46 days after transplanting. The former irrigation resulted in 1.2 to 1.4 times in plant height as long as the other irrigations around 26 days after transplanting and then the difference was increased to 1.6 to 2.0 times around 64 days after transplanting. Under the twice irrigation a day, plant height, root length, stem diameter, root diameter, number of leaf, fresh plant weight, dry plant weight, fresh root weight, dry root weight were 1.6 to 2.0, 1.1, 1.2 to 1.6, 1.3 to 1.8, 1.9 to 2.7, 1.7 to 8.0, 1.6 to 2.8,2.0 to 3.0, 1.6 to 2.7 times as high as those under the other irrigation regimes, respectively.

• 한국작물학회지
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• 제44권3호
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• pp.214-220
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• 1999

Rice production in Korea has markedly increased during the last two decades due to newly developed high yielding varieties and improved production technology. This experiment was conducted to determine the potential of tropical japonica germplasm in enhancing the yield of temperate japonica. The yield performance of two tropical japonicas (IR 65597-29-3-2 and IR66154-52-1-2) and one temperate japonica (Dongjinbyeo) was compared at different plant densities and nitrogen levels under Korean environmental conditions. Although tropical japonicas showed low tillering habit and large panicles, they had similar leaf area index and dry weight at heading stage to Dongjinbyeo of the high tillering type indicating that there was not much difference between tropical and temperate japonica in terms of biomass production. The highest milled rice yield of 6.15 t/ha was obtained from Dongjinbyeo at a high nitrogen level with less planting density (220 kg N/ha and 30 $\times$ 15 cm). However, those of the two tropical japonicas were 5.36 t/ha at the condition of 165 kg N/ha and 30 x 10 cm planting density and 5.06 t/ha at the condition of 165kgN/ha and 15 x 15 cm planting density, respectively. Ripened grain of tropical japonicas ranged from 65 to 87%, while that Dongjinbyeo ranged from 82 to 97% under Korean conditions.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1992년도 춘계 학술대회지
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• pp.50-51
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• 1992

• 한국작물학회:학술대회논문집
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• 한국작물학회 1989년도 춘계 학술대회지
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• pp.114-115
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• 1989

• 한국조경학회지
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• 제26권2호
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• pp.194-206
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• 1998

In 1977, Local governments' planting regulations for the development projects were established in accordance with the revised building law in Korea. A landscaped area, planting densities of trees and shrubs, a percentage of evergreen plants, minimum tree size and species were prescribed in the planting regulations. But the clauses for an excessive planting density and a high ratio of evergreen trees that the regulations includes, have been gradually in the way to a creative planting design, and raise a problem of poor growth of trees an a disordered planting landscape. Therefore, in this study the present planting regulations of 124 local governments throughout the country were analyzed and compared with 13 foreign local governments' of 4 countries ; Japan, the United States of America, Canada and Singapore. And the linitations and characteristics of the regulations are drawn as follows ; 1. The regulations focus on controlling the green spaces and plantings by quantitative methods such as controlling the number of trees and the landscaped area, which are inadequate for estimating the crown coverage of mature trees, and which areinadequate for estimating the crown coverage of mature trees, and implementing the function of polantings and the use of green spaces. 2. Minimums of tree densities are higher than those of foreign countries, especially higher about 10 times to 100 times than those of the United States of America. 3.Excessive number of evergreen trees and fruit trees should be planted under the present planting regulations, that results in constricting the creativity in planting design. 4. An article for using specific tree size, 2.0ms over in height makes it difficult to use a wide variety of different sizes of trees. And there is no incentive measures when larger trees are planted. To enhance the quality of green spaces and plantings, it is needed that the function and locating of green spaces and plantings have to be emphasized, and the planting density should be concerned about the mature tree size. The incentive measure to use various sizes of trees is also needed, and the regulations to use excessive number of evergreen trees or fruit trees should be loosened.