• 아시안잔디학회지
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• 제13권2호
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• pp.79-90
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• 1999

This study was conducted to provide basic understandings for proper management of zoysiagrass fairways. Mowing intervals of 2, 4 and 6-days, with and without aeration were compared at two fertility levels. Turfgrass quality, growth and pest infestation were evaluated. Turf density, number of tillers, leaf width and resiliency were significantly affected by mowing frequency. Turfgrass plots mowed every 2-day had greater density, tillering, and resiliency but had narrower leaf width compared to other mowing treatments. Clipping dry weight with every 2-day mowing increased in the early stage of mowing treatment regardless of fertilizer application rates but gradually decreased in the later stage of mowing treatment compared to every 4 or 6-day mowings. The dry weight of above-ground part was not affected by mowing frequency, but that of underground part was significantly higher for every 6-day mowing frequency(3.3kg/day/m2) compared to every 2 or 4-day mowings. The organic mater content in soil was not different among mowing treatments but it was significantly reduced by the core aerification treatment, indicating significant effect of core aerification on thatch decomposition. Occurrences of weeds such as annual bluegrass and crabgrass according to mowing frequency were greater in every 2-day mowing treatment, while plots mowed every 6 days had less weed occurrence. Occurrence of rusts significantly increased in high fertility plots and frequently mowed turfgrasses.

• 아시안잔디학회지
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• 제13권3호
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• pp.139-146
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• 1999

This studies was carried out to estimate the influence of mowing height, time lapse, rolling, and dew removal on green speed of putting green in Lake Side C. C. on 29, 30 Jun. 1998. The results were as follows. As mowing height increased, green speed tended to be decreased. After mowing, green speed tended to be decreased over the time, and appeared to be decrease significantly on the next day[Y=3.206-0.127.X1-1.41$\times$10-2.X4(Y=green speed, X1=mowing height, X4=time lapse)]. This suggests that the frequency of mowing must be increased to maintain the green speed. But, frequent mowing cause the turfgrass of putting green to be stressed. Rolling tended to increase green speed[Y=3.555-0.202.X1+0.111.X2(Y=green speed, X1=mowing height, X2=rolling)]. Thus, rollers is thought to be an tool used to increase green speed and rolling is expected to be able to decrease turfgrass stress while maintaining the performance level of the putting green. Dew removal appeared to increase green speed significantly[Y=2.499-0.125.X1+0.366.X3(Y=green speed, X1=mowing height, X3=dew removal)]. Thus, dew removal is expected to maintain the green speed in the morning.

• Weed & Turfgrass Science
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• 제5권4호
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• pp.268-273
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• 2016

Potassium is well-known to improve turfgrass tolerance to environmental stresses such as low temperature and drought stress. Low mowing height reduces leaf area of turfgrass that is main place for photosynthesis and carbohydrate production. Closely-mowed turf would suffer from summer decline by low level of carbohydrate resulted from low photosynthesis of reduced leaf area. The objective of the study is to investigate K rate and mowing height for Kentucky bluegrass. The K rate treatments were 5, 10, and $20g\;K_2O\;m^{-2}$ for the low, medium and high K rates, respectively. The bi-weekly mowing treatment was made for treatments. Mowing was implemented at 40 and 100 mm using a rotary mower. Regardless K rates, the high mowing height would be required when the air temperature is higher than $28.5^{\circ}C$ and high turfgrass quality of Kentucky bluegrass is needed. When the air temperature is optimal for cool-season grass, the high mowing height and the low K rate is needed for the root length of Kentucky bluegrass.

• 아시안잔디학회지
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• 제1권1호
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• pp.56-68
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• 1987

During the regrowth the process after mowing, NRA in the leaf was the highest activity from the 5th day to the 7th day. Before mowing, the NRA in the root was not almost detected. But, the NRA in root appeared a rapid increasing activity from the 3rd day to the 4th day after mowing ( Figs.27 ~ 32). During the regrowth process after mowing, a general tendency of AA in the aboveground parts appeared an increasing tendency from the 1st day to the 4th day, a rapid increasing tendency from the 7th day to the 8th day reaching its peak, and a decreasing rate on the 8th and 9th day reaching its peak, and a decreasing rate on the 8th and 9th day. But the AA in the root appeared rapid increasing rate from the 2nd day to the 7th day, the heginning of reagrowth, this tendency showed a similar figure in the case of Total Soluble Carbohydrate ( TSC) in the internode. Both AA and NRA were appeared recovery stage frorn the 8th day after mowing(Figs.15~20). During the regrowth process after mowing, changes of the maximum plant lengths were 18.27cm in the 6cm mowing plot on the 24th day after mowing, 18.83cm in the 3cm mowing plot on the 18th day after mowing, and 18.16cm in the 6cm mowing plot on the 14th day after mowing ( Fig.2). During the regrowth process after mowing. changes in Dry Matter (DM) contents in leaf and stem were a slow decreasing tendency from the 1st day to the 4th day. From the 5th day to the 8th day it appeared a rapid increasing tendency. And afterward until the 15th day. All treatments were reached at a steady state ( Figs.3 ~ 8). During the regrowth process after mowing, changes in the TSC contents of stem and crown were a slow decreasing tendency from the 1st day to the 5-6th day. Prom the 7th to the 8th day three was a rapid increasing tendency. And afterward until the 15th day there was a decreasing rate at a steadyv state. In root there was a similar tendency to that of leaf and stem organs. A general tendency in internode, the TSC content appeared a similar figure to increment of AA (Figs. 9 - 14). During the regrowth process after mowing, changes in te Crude Proem (CP) content of ahoveground parts appeared a slow increasing tendency from the 1st day to the 5-6th day, where it is peak. And afterward to the 15th day there was a decreasing rate at a steady state. But, in toot there were a contrary tendency to that of aboveground

• 한국자원식물학회지
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• 제24권2호
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• pp.260-266
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• 2011

잔디 실생묘를 이식하여 조성된 잔디밭에서 초봄의 생육 초기에 많은 피해를 주고 있는 월년생(동생) 잡초를 방제하고자 예초실험을 실시한 결과 요지는 다음과 같다. (1) 전체 예초 시험구별 잡초발생율은 평균 17.9%였다. (2) 저 예초 시험구인 12.5 mm 구에서 잡초발생율은 24.7%로 높게 나타나, 4개의 예초 시험구 가운데 잡초억제효과가 가장 낮은 것으로 나타났다. (3) 22.5 mm 구에서는 10.6%의 잡초발생율을 보여 가장 높은 잡초억제효과를 나타내고 있다. (4) 고 예초 시험구인 32.5 mm 구와 42.5 mm 구에선 각각 평균보다 다소 높은 18.2%와 18.3%의 잡초발생율을 나타냈다.

• 한국조경학회지
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• 제29권4호
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• pp.91-99
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• 2001

This study was carried out to investigate the effects of mowing height, rolling, N-fertilizing, and season on green speed(i.e., ball-roll distance) for developing and implementing a program of increasing green speed in Korean golf courses. Data were subjected to multi-regression analysis using SPSSWIN(Statistical Package for the Social Science), which collected from Yong-Pyong golf course greens selected to investigate. The results was as follows. 1) The multi-regression analysis of mowing height, rolling times, and N-fertilizer application rates on spring green speed was as follows; $Y_1$(spring green speed)=4.287+0.155X$_1$(rolling times)-0.131X$_2$(the amount of N-fertilizing)-0.251X$_3$(mowing height). 2) The multi-regression analysis of mowing height, rolling times, and N-fertilizer application rates on summer green speed was as follows; $Y_2$(summer green speed)=4.833-0.423X$_3$(mowing height)+0.146X$_1$(rolling times)-0.107X$_2$(the amount of N-fertilizing). 3) The multi-regression analysis of mowing height, rolling times, and N-fertilizer application rates on fall green speed was as follows; $Y_3$(fall green speed)=4.651-0.383X$_3$(mowing height)+0.142X$_1$(rolling times)-0.103X$_2$(the amount of N-fertilizing). 4) As mowing height was lowered by 1mm, green speed increased by 0.251~0.423m. As rolling times increased by 1(one), green speed increased by0.142~0.15m. As the amount of N-fertilizing increased by 1g/$m^2$, green speed decreased by 0.103~0.131m. The season also affected green speed. In comparison with spring green speed, summer green speed decreased by 0.145m and fall green speed decreased by 0.144m.

• 한국환경농학회지
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• 제27권4호
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• pp.356-361
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• 2008

Chrysanthemum indicum L. (Gamgug) has been examined to study their flowering habits, yields and bioactive compounds under different planting densities and mowing dates. The planting density experiment revealed a significantly increasing stem diameter, number of flowers and branches with decreasing plant density in the $100\;cm{\times}30\;cm$ and $130\;cm{\times}30\;cm$ treatments as compared to $70\;cm{\times}30\;cm$ treatments, but not plant height, leaf and flower width. On the other hand, the mowing date experiment showed that growth characteristics of plants were similar to the control plants (not mowing) and June 20 treatment, but July 20 treatments had significantly smaller than the control. The weights (g $plant^{-1}$) of dry flowers were affected by the planting density and mowing date. The flower yield of $586\;kg\;ha^{-1}$ obtained at $100\;cm{\times}30\;cm$ density was 11% and 22% higher than that of $120\;cm{\times}30\;cm$ and $70\;cm{\times}30\;cm$ treatments, respectively. The yield of dry flowers in the control and June 20 mowing date ranged $495-508\;kg\;ha^{-1}$, which is 40-42% higher than the yield in the July 20 treatments. The amount of essential oil (g $plant^{-1}$) in medically valuable flowerheads of C. indicum L. was statistically different between mowing dates but not among planting densities. The study showed that planting density and the mowing date could increase yields of flowerheads. An optimum planting density of $100\;cm{\times}30\;cm$ and mowing date of on or before June 20 is recommended for C. indicum L.

• 아시안잔디학회지
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• 제24권1호
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• pp.16-23
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• 2010

잔디 깎기는 골프장에서 중요한 관리 작업의 한가지이다. 잔디깎기 주기와 높이는 잔디의 광합성 능력, 밀도, 뿌리생장 등에 영향을 미친다. 본 실험은 한국잔디의 잔디깎기 높이별 지상부 생장량을 조사하여 적절한 잔디깎기 주기를 결정할 수 있는 자료를 제공하고자 수행되었다. 들잔디를 10mm 높이로 관리시 줄기의 일 생장량은 2.1-4.7mm(7월), 1.9-2.9 mm(8월), 0.9-1.5 mm(9월), 0.6 mm(10월)로 조사되었다. 상기 자료는 잔디깎기를 초장의 33% 이내로 깎는다는 개념으로 볼 때 7월에는 1.1~2.3일, 8월에는 1.7~2.4일, 9월에는 3.5~5.4일, 그리고 10월에는 8.5일 간격으로 깎기를 하는 것이 적합한 것으로 나타났다. 들잔디를 15 mm 및 17 mm 높이로 관리시 깎은 후의 지상부 생장량은 7월 4.0-5.3 mm, 8월 2.9-4.5 mm. 9월 1.4-3.7 mm 그리고 10월 13 mm로 나타나 7, 8, 9, 10월의 적정 깎기 주기는 각각 1.4~1.9일, 1.7~2.5일, 2.3~6.3일, 6.8일이 적합한 것으로 나타났다. 들잔디를 18 mm 및 21 mm 높이로 깎은 후의 생장량은 7월 3.5-4.7 mm, 8월 2.9-4.9 mm, 9월 1.5-1.8 mm로 나타났으며, 7, 8, 9월의 적정 깎기 주기는 각각 1.9~2.6일, 1.8~3.1일, 5.9~7.0일의 범위로 나타났다. 그리고 50 mm 높이 깎은 경우는 지상부 생장량이 7월 4.6-4.9 mm, 8월 5.0-6.5 mm, 9월 2.5-4.7 mm로 나타나 7, 8, 9월의 적정 깎기 주기는 각각 5.1~5.4일, 3.9~5.0일, 5.3~9.8일의 범위로 계산되었다. 상기 조사 결과 깎기 높이에 따라 재생장 길이에 차이를 보이는 것으로 나타났으며, 짧게 깎을수록 재생장 길이가 짧아지는 것으로 조사되었다.

• 한국잡초학회지
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• 제7권1호
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• pp.29-34
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• 1987

예취시기(刈取時期)에 변동(變動)에 따른 올챙고랭이 실생주(實生株)의 재생력(再生力)과 연간생장량(年間生長量)을 측정(測定)하므로써 예취(刈取)에 의한 효율적(效率的)인 방제시기(防除時期)를 결정(決定)하기 위하여 본(本) 시험(試驗)을 수행(遂行)하였다. 예취시기(刈取時期)는 4월 30일부터 7일 간격으로 6월 18일까지 8회에 걸쳐 수행(遂行)하였으며, 조사내용(調査內容)은 무처리(無處理)의 생장(生長)과 함께 예취후(刈取後) 2 주간(週間)의 재생량(再生量) 및 7월 30일까지의 재생장량(再生長量)을 조사(調査)하였다. 1. 예취후(刈取後) 2주간(週間)의 재생경수(再生莖數)는 6월 5일 예취(刈取)까지 예취시기(刈取時期)가 늦어짐에 따라 왕성(旺盛)하게 많아지다가 그 이후(以後)에 둔화되었다. 2. 7월 30일의 재생경수(再生莖數)는 5월 14일 예취시(刈取時)까지는 예취기(刈取期)가 빠를수록 많았으나 이후(以後) 급감(急減)하는 경향(傾向)이었다. 3. 예취기(刈取期)가 2주간(週間)의 초장재생(草長再生)은 5월 14일 예취(刈取)를 전환점(轉換點)로 이전(以前)에는 예취기(刈取期)가 늦어질수록 커졌으나 이후(以後)에는 감소(減少)하는 경향(傾向)이었다. 4. 7월 30일까지의 초장재생량(草長再生量)은 차이(差異)가 크지는 않았으나 예취기(刈取期)가 늦어질수록 감소(減少)하는 양상(樣相)이었다. 5. 예취후(刈取後) 2주간(週間) 및 7월 30일까지의 재생량생체중(再生量生體重)은 각각 예취시기(刈取時期)가 늦어질수록 증가(增加)하는 경향(傾向)이었다. 6. 무처리(無處理)에 대비(對比)한 경수(莖數) 및 초장(草長)의 재생율(再生率)은 예취후(刈取後) 2 주간(週間)의 경우, 전반적으로 무처리(無處理)보다 예취기(刈取期)가 늦어짐에 따라 감소(減少)하는 경향(傾向)이었으며, 7월(月) 30일까지의 경우에는 예취기지연(刈取期遲延)으로 무처리(無處理)의 50% 미만까지 감소(減少)하였다. 7. 생체중재생률(生體重再生率)은 5월 22일 예취(刈取)를 전환점(轉換點)으로 하여 이전(以前)에는 예취시기(刈取時期)가 빠를수록 높았고, 이후(以後)에는 급격(急激)히 감소(減少)하는 경향(傾向)이었으며. 이들 현상(現象)은 예취후(刈取後) 2주간(週間)의 재생율(再生率)이 7월 30일까지의 재생율(再生率)보다 두드러진 양상(樣相)이었다. 8. 연간생장율(年間生長率)은 예취기(刈取期)의 지연(遲延)에 따라 경수(莖數)와 초장(草長)에서 서서히 감소(減少)하였으나 생체중(生體重)에서는 5월 15일 예취(刈取)를 전환점(轉換點)으로 예취시기지연(刈取時期遲延)에 따라 급격(急激)한 감소후(減少後)에 정체(停滯)되는 경향(順向)이었다.

• 한국유기농업학회지
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• 제25권1호
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• pp.85-99
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• 2017

9년생 '신고'배(Pyrus pyrifolia Nakai)나무 과원에서 화학비료 대체 기술을 확립하고자 녹비작물의 예초시기와 예초높이에 따른 무기성분의 환원량을 2009년에 비교하였다. 호밀과 헤어리베치를 2008년 가을에 혼파하여 예초시기를 기준으로 총 4가지 처리를 포함하였다. 4월 18일에 1차 예초와 5월 28일에 2차 예초 한 것을 4월 18일+5월 28일 예초 처리구로 설정하였고, 4월 28일+6월 8일 예초, 5월 8일+6월 18일 예초, 4월 18일+5월 18일+6월 18일 예초처리를 시험에 이용하였다. 예초높이 처리는 $3{\pm}1cm$, $7{\pm}1cm$, $13{\pm}1cm$ 높이에서 4월 18일과 6월 8일에 각각 예초한 것을 포함하였다. 예초 시기별 처리에서, 5월 8일+6월 18일 예초처리가 녹비작물과 자연초종의 건물중 생산량이 ha당 14,480 kg으로 가장 높았고, 이에 따라 토양에 환원되는 전질소와 칼륨도 ha당 각각 292 kg과 396 kg으로 가장 높았다. 예초 높이 처리에서는 $7{\pm}1cm$ 처리에서 녹비작물과 자연초종의 건물중 생산량이 ha당 11,970 kg으로 가장 낮아서 전질소와 인산, 그리고 칼륨이 ha당 각각 265 kg, 111 kg, 333 kg으로 가장 낮았다. 녹비작물 처리는 예초방법에 상관없이 토양의 유기물 함량을 다소 증가시켰던 것으로 관찰되었다.