• 생물환경조절학회지
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• 제10권2호
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• pp.118-119
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• 2001

감귤의 품질을 향상시킴에 있어서 ethephon의 실용상 문제점을 해결하고자 탄산칼슘제와 몇 종류의 수용성칼슘제를 가용하여 엽면살포를 하고 품질조사와 더불어 낙엽율을 조사하였다. 착색도 a값이 ethephon에 Clef-non, Cell-bine, Hicalux, Calcium acetate 가용처리가 무처리에 비해 높아져서 착색이 촉진되는 경향을 나타내어 수확기를 앞당길 수 있었다. 낙엽율은 ethephon에 Cell-bine 또는 Hicalux 가용처리한 경우에 낙엽이 현저하게 감소되었다. 당도는 ethephon 단용처리, ethephon+Clef-non, Cell-bine 가용 처리구가 무처리에 비해 각각 1.6, 1.54, 1.54$^{\circ}$Bx가 높은 결과를 보였고 산도도 이와 유사한 경향이었다. 따라서 본시험을 통하여 ethephon에 Cell-bine을 가용하여 살포하여 주는 것이 착색을 촉진시키고 낙엽율을 경감시킴과 동시에 당도를 높여서 하우스밀감의 품질을 향상시킬 수 있는 결과를 얻을 수 있었다.

• 생물환경조절학회지
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• 제10권2호
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• pp.111-117
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• 2001

본 시험은 플라스틱하우스에서 재배된 하우스온주밀감의 품질향상(착색, 증당, 감산)을 기하고자 제1인산칼륨을 엽면살포하여 품질조사를 하였다. 과피의 착색도 a는 제1인산륨 살포회수가 많아질수록 경시적으로 증가하는 경향을 나타내었으나 수확기에 가까울수록 인산칼륨 살포에 의해 더 증가되지 않았다. 포도당은 인산칼륨 살포회수가 많아질수록 증가되었고 또한 과당도 이와 유사한 경향ㅇ르 나타내고 있다. 포도당과 과당을 합한 환원다은 인산칼륨 살포회수를 많이 할수록 증가되는 경향이 뚜렷하여 무처리에 비해 5회 살포구 이상에서는 0.32~0.41%.mL$^{-1}$-juice가 증가되었으며, 자당함량에서도 인산칼륨 살포회수가 많아질수록 증가되는 경향을 보였으나 통계적 유의치는 인정되지 안았다. 총당함량에서는 인산칼륨 살포회수에 따른 효과가 있어서 인산칼륨 살포회수가 많아질수록 총당함량이 증가되는 경향이었다. 당도는 인산칼륨 살포회수가 많아질수록 증가정도는 미미하나 5회 살포구 까지는 증가되는 경향을 나타내어 무처리에 비해서 0.93$^{\circ}$Bx 증가되었다. 산도는 무처리에 비해 낮았지만 살포회수간에는 뚜렷한 차이가 없었다.

• 한국토양비료학회지
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• 제46권1호
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• pp.53-57
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• 2013

초가을 태풍에 의해 잎 손실이 심해지면 감나무의 과실 품질이 나빠지고 이듬해 생장에 필요한 저장양분이 감소한다. 본 연구에서는 비가림하우스 내 50 L 용기에서 재배한 2년생 '부유' 감나무를 대상으로 9월 상순에 인위적으로 적엽한 후 엽면시비 효과를 검토하였다. 9월 9일에 나무 전체 잎 수의 75%를 고루 적엽한 후 9월 중순과 10월 중순에 요소 0.5%액을 8회 엽면시비하거나 요소와 제일인산칼륨을 교호로 4회씩 엽비시비 (요소+KP 시비구)하는 처리를 하였다. 적엽한 나무 일부는 시비를 하지 않고 대조구로 두었다. 요소 엽면시비로 11월 6일 잎의 N과 P 농도가 대조구에 비해 약간 증가한 반면, 요소+PK 시비에 의해 P와 K농도는 유의적으로 증가하였다. 엽면시비는 과실 비대에 영향을 끼치지 않았으나 과피의 착색을 감소시키는 경향이었다. 과실 당도는 요소 또는 요소+NK 시비로 대조구보다 각각 1.5, $1.0^{\circ}Brix$가 높아졌다. 엽면시비로 세근의 건물중이 증가한 것을 제외하면 영구기관인 지상부 목질과 뿌리의 건물중은 유의적인 변화가 없었다. 영구기관의 N 농도는 엽면시비구에서 높은 경향인 반면 P와 K의 변화는 뚜렷하지 않았다. 가용성당 또는 전분 농도는 엽면시비 방법에 관계없이 신초, 주간 또는 세근에서 증가하였다. 본 연구의 결과는 엽면시비가 잎 손실 감나무의 과실품질과 저장양분 회복에 부분적으로 유용할 수 있음을 나타내었다.

• 농업과학연구
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• 제38권2호
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• pp.191-198
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• 2011

Herbicidal effects and crop selectivity of aqueous leaf extracts of sorghum (Sorghum bicolor L.) were evaluated against several weed species for developing sustainable weed management in organic farming. Aqueous sorghum leaf extracts were highly phytotoxic to different weed species. No broadleaf weeds were germinated in the concentration of 5 fold or higher concentrated sorghum leaf extracts and 90% of seed germination was inhibited within that range in grass species. Sorghum leaf extracts strongly inhibited the growth of different weeds by pre-emergence and foliar applications in greenhouse condition. Foliar application of sorghum leaf extracts had a higher inhibitory effect than the pre-emergence application. Broadleaf weed species were more susceptible than grasses to the application of sorghum leaf extract in foliar applications than grasses. Galium spurium, Erigeron candensis, and Rumex japonicus were completely killed at the highest concentrated sorghum leaf extract both in pre-emergence and foliar application. Most broadleaf weed species were inhibited more than 80% at pre-emergence application at 50 fold concentrated sorghum leaf extract. G. spurium, E. candensis, R. japonicus, Eclipta alba, Plantago asiatica and Portulaca oleraeea were most susceptible to sorghum leaf extract in foliar application. Growth of most broad leaf weed species was suppressed by greater than 90% at 50 fold concentrated sorghum leaf extract. Most crop species were tolerant to sorghum leaf extract but shoot growth was slightly reduced by the application of 40~50 fold concentrated extracts, Sorghum leaf extract may used to control weeds in organic fanning without affecting the growth of crop.

• 한국환경농학회지
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• 제38권1호
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• pp.47-53
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• 2019

BACKGROUND: This experiment was conducted to examine the effects of organic Se concentration and the number of foliar applications on growth characteristics and Se content in rice. METHODS AND RESULTS: A series of multiple foliar applications were performed at (1) 3 times (maximum tillering stage + booting stage + heading stage), (2) 4 times I (effective tillering stage + maximum tillering stage + booting stage + heading stage), (3) 4 times II (maximum tillering stage + booting stage + heading stage + grain filling stage) according to the development stage. Each set of the foliar application plots was treated with 0, 10, 20, 40, 60, 100 ppm of Se and with mixed pesticide ($P^*$ + Se 40 ppm) in which the treatment time was the same as that of the treatment 4 times II. The total cultivation period of rice was 184 days. Se contents in rice (brown rice, white rice) were analyzed by ICP. CONCLUSION: The number of grains per head tended to decrease with increasing concentrations of organic Se in all treatments. However, number of panicles per hill did not show statically significant differences between the 3 times and 4 times I treatments. The grain yield decreased with the 3 times and 4 times II, but there was no significant difference in 4 times I. Se content in brown rice was the highest at 100 ppm Se (5268.64) treatment and lowest at 10 ppm Se ($1269.19{\mu}g{\cdot}kg^{-1}$) treatment. Se content in the polished rice was the highest at 100 ppm Se (5047.33) treatment and lowest at 10 ppm Se ($885.05{\mu}g{\cdot}kg^{-1}$) treatment. The higher selenium was treated, the higher Se content was found in the rice (brown rice, polished rice).

• 한국토양비료학회지
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• 제39권2호
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• pp.80-85
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• 2006

The foliar injuries and absorption rates of calcium compounds in tomato (Lycopersicon esculentum cv. momotaro) and citrus [Shiranuhi(C. Marc. ${\time}C$. sinensis Osbeck)${\time}C$. reticulata Blanco)] were investigated. 0.3, 0.5 and 1.0% of $CaCl_2$, $Ca(NO_3)_2$, $Ca(H_2PO_4)_2$, Ca-EDTA, Ca formate or Ca acetate solution were applied to the leaves of tomato and citrus. The leaf burns were observed only in the foliar applications of Ca-EDTA and $Ca(H_2PO_4)_2$. Ca-EDTA exhibited more serious foliar injury than CaH2PO4. As applied with $^{45}CaCl_2$, $^{45}Ca(NO_3)_2$, $^{45}Ca$ formate or $^{45}Ca$ acetate, the rates of Ca absorptions by tomato and citrus leaves for 7 days were 17 to 32% and 6.6 to 46%, respectively. It meant that the absorption was differently influenced on calcium compounds. In tomato, the order of Ca foliar absorption was $Ca(NO_3)_2$ > Ca formate = $CaCl_2$ > Ca acetate. Although there was no difference in Ca absorption between the adaxial and abaxial parts of tomato leaves, total absorption was greater in expanded leaves than in expanding ones. On the other hand, in citrus Ca foliar absorption from $Ca(NO_3)_2$ or Ca formate was more active than that from $CaCl_2$ or Ca acetate. In conclusion, $Ca(NO_3)_2$ and Ca formate are recommended for the foliar application of Ca in tomato and citrus in order to increase absorption of Ca into their leaves.

• 한국토양비료학회지
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• 제46권3호
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• pp.209-215
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• 2013

This study was conducted to investigate the effects of boron treatments on flower spike dieback of Statice (Limonium spp.) grown in soilless hydroponic and soil cultures under rain shelter system. The growth of Statice was gradually improved with increasing boron applications in the hydroponics, but not in soil culture with boron treatment as foliar spray or soil application. The degree of flower spike dieback in 6 levels (0, no dieback incidence to 5, very severe dieback incidence) ranged between 0.5 with boron application and 4.4 with no boron treatment. The content of boron in Statice flower spike increased with increasing rates of boron applications in the hydroponics, but the contents of P, Mg, and N were not affected by the boron application. However, K content was highest with no boron treatment. In soil culture, incidence of flower spike dieback decreased with foliar spray or soil application of boron. Therefore, boron application was effective in reducing flower spike dieback and improving cut-flower productivity and its quality, and the recommended rates of boron application were $50{\sim}80{\mu}gL^{-1}$ for hydroponics culture whereas 0.2% borex or ${\geq}0.4kg\;10a^{-1}$ boric acid by foliar spray application for soil culture.

• 한국약용작물학회지
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• 제6권1호
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• pp.1-5
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• 1998

강원도 평창에서 송어 양식후 배출되는 냉수를 이용하여 고추냉이를 재배하면서 계절 및 생육기간에 따른 근경의 allyINCS 함량 변화를 조사하고 화학비료의 엽면시비에 따른 allyINCS의 함량증가를 꾀하여 품질을 높이고자 시험한 결과는 다음과 같다. 1. 생육초기부터 생육후기인 이듬해 3월 개화기까지 생육기간의 경과에 따라 근경의 allyINCS 함량은 증가되는 경향이었으나 개화말기인 5월경에는 급격히 저하되었다. 2. 요소 1% 수용액 엽면시비는 대체로 생육을 촉진시켜 근경중을 증가시키거나 allyINCS 함량 증가에는 효과가 없었다. 3. 황산염을 함유한 비료(황산암모늄, 황산칼륨)의 엽면시비는 근경중과 근경의 allyINCS함량을 증가시켰는데 , 황산암모늄보다 황산칼륨 처리가 근경중 및 근경의 allyINCS 함량 증가에 더 효과적이었으며 황산 칼륨처리로 근경중이 44%, allyINCS 함량이 38% 증가 되었다. 4. 요소 1%와 황산암모늄 1% 수용액의 혼합처리는 고농도로 인하여 생육장애를 보여 근경중은 대조구와 비슷하였으나 근경의 allyINCS 함량은 47% 증가되었다.

• 한국환경농학회지
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• 제16권3호
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• pp.207-211
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• 1997

Bentazon의 잔류를 제거하기 위한 미나리의 생물학적 정화능력을 검정코자 $^{14}C-Bentazon$의 흡수(uptake)와 이행(translocation), 그리고 분해(metabolism) 실험을 통하여 비교 실험하였다. 잎에 처리한지 2일 후에 있어서 $^{14}C$의 21%가 처리된 잎에서 관측되었고, 66%는 잎 표면을 물로 세척한 곳에 잔류하고 있었으며, 나머지 13%는 epicuticular wax층에서 발견되었다. Bentazon을 처리한 잎으로부터 $^{14}C$의 79%가 검출되었으며, 뿌리에는 9%만이 검출되어 잎으로부터 뿌리로의 이행은 매우 적었다. 처리한 2일후에 $^{14}C$의 methanol 추출물 분석에서 잎에 처리된 제초제의 60% 이상이 모든 식물체 부위에서 분해되었다. 본 실험에서 발견된 주요 bentazon의 분해물(Metabolites)은 bentazon이나 6-hydroxy 혹은 8-hydroxy bentazon 보다 덜 이온화(Polar)된 알려지지 않은 신 물질(unknown compound)이었다.

• 한국작물학회지
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• 제13권
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• pp.83-92
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• 1973

In order to compare the forage value and to promote the growth without the hindrance of rice transplanting period for several forage crops as prior crops of paddy field, this experiment was conducted. Three kinds of foliar application, such solution as Urea, Gibb. and Gibb. +Urea were applied to promote the growth. The results gained are summarized as follows; 1. According to the forage crops, there were large difference of yields. The rankings of yield were shown as follows; Fresh weightㆍDry weight : Oats. Italian rye grass. White clover. Corn. Soybean. Crude protein content: Soybean. White clover. Corn. Italian rye grass. Oats. Crude protein Yield: White clover. Italian rye grass. Oats. Corn. Soybean. 2. The ranking of suitable forage crops as prior crops of paddy field were Oats, Italian rye grass, White clover, but Corn and Soybean were unsuited. 3. In general, length of stem, length and width of leaf were enlarged such rank as foliar application of Urea, Gibb. and Gibb. + Urea solution. There were apt to be increased fresh and dry weight by growth of stem length, these trend were shown among all crops and between foliar applications of same crops. 4. All crops were shown not only promoted growth but also increased yield by every treatments. The order of application effects were as follows; Fresh weigthㆍDry weigth: Gibb., Gibb. +Urea, Urea. Crude protein content and yield: Urea, Gibb, Gibb. + Urea. 5. In Oats, heading date was more accelerated 1, 2 and 3 days than control by foliar application of Urea, Gibb. and Gibb. + Urea respectively.