• Asian-Australasian Journal of Animal Sciences
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• 제4권3호
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• pp.245-250
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• 1991

Analysis of the characteristics and the grouping of the species of sown and weeds in artificial pastures was studied applying the principal component analysis method. Presency and coverage of six sown species and fifteen weed species which occurred in pastures of under-grazing and optimumgrazing were subject to analysis. From field survey, species were divided into three groups: the group A included five species such as Festuca arundinacea, Lolium perenne and Dactylis glomerata, etc., the group B included eleven species such as Polygonum longisetum, Agrostis alba and Rumex obtusifolius, etc., and the group C included five species such as Miscanthus sinensis, Rubus palmatus and Artemisia princeps, etc. The group A species corresponded to good pasture conditions and management. On the contrary, the group C species occurred in poor pasture conditions with inadequate management. The group B species corresponded to intermediate pasture conditions and management. Interrelated pair species co-existing and species non-co-existing were discovered. Factor loading as negative for the group A species. positive for the group C species and positive but lower than the group C species for the group B species. From these results it is concluded that the principal component analysis seems to one of the useful tools for the analysis of characteristics of species and the diagnosis of sown pasture vegetation, although further studies are required to get more general information about species characteristics.

• 한국초지조사료학회지
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• 제11권1호
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• pp.28-28
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• 1991

1 1985년 4월부터 10월까지 수원 축산시험장 목초지에서 목초지의 환경요인에 따른 굼벵이의 종류 및 발생량을 조사한 결과는 다음과 같다. 목초지의 환경요인에 따른 굼벵이의 발생종규는 비슷하였으나 발생량에는 차이가 있었다. 1. 토성에 따라서는 식양토에서 고려노랑풍뎅이, 우찌다콩풍뎅이, 큰검정풍뎅이, 참검정풍뎅이 등이, 사양토에서는 애풍뎅이와 다색줄풍뎅이가 많이 발생 하였다. 2 목초에 따라서는 조사된 모든 종의 굼벵이가 화본과에서 월등히 많은 발생량을 보였는데 우찌다 콩풍뎅이만은 두과에서 발생량이 월등히 많았다. 3 목초지 활성연도에 따라서는 조사된 모든 종이 3년에서부터 발생량이 증가하여 5년에서 가장 많은 발생량을 보였다. 4 목초지 관리(이용) 방법에 따라서는 조사된 모든 종의 굼벵이가 채초지에서 발생량이 많았다.

• 한국초지조사료학회지
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• 제11권1호
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• pp.38-42
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• 1991

1 1985년 4월부터 10월까지 수원 축산시험장 목초지에서 목초지의 환경요인에 따른 굼벵이의 종류 및 발생량을 조사한 결과는 다음과 같다. 목초지의 환경요인에 따른 굼벵이의 발생종규는 비슷하였으나 발생량에는 차이가 있었다. 1. 토성에 따라서는 식양토에서 고려노랑풍뎅이, 우찌다콩풍뎅이, 큰검정풍뎅이, 참검정풍뎅이 등이, 사양토에서는 애풍뎅이와 다색줄풍뎅이가 많이 발생 하였다. 2 목초에 따라서는 조사된 모든 종의 굼벵이가 화본과에서 월등히 많은 발생량을 보였는데 우찌다 콩풍뎅이만은 두과에서 발생량이 월등히 많았다. 3 목초지 활성연도에 따라서는 조사된 모든 종이 3년에서부터 발생량이 증가하여 5년에서 가장 많은 발생량을 보였다. 4 목초지 관리(이용) 방법에 따라서는 조사된 모든 종의 굼벵이가 채초지에서 발생량이 많았다.

• 한국농공학회지
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• 제45권7호
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• pp.83-93
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• 2003

This research compared the observed and model predicted results that include; runoff, sediment yield, and nutrient losses from a 2.71 ha cattle grazing pasture field in North Alabama. Application of water quality computer simulation models can inexpensively and quickly assess the impact of pasture management practices on water quality. AGNPS single storm based model was applied to the three pasture species; Bermudagrass, fescue, and Ryegrass. While comparing model predicted results with observed data, it showed that model can reasonably predict the runoff, sediment yield and nutrient losses from the watershed. Over-prediction and under-prediction by the model occurred during very high and low rainfall events, respectively. The study concluded that AGNPS model can be reasonably applied to assess the impacts of pasture management practices and chicken litter application on water quality.

• 한국초지조사료학회지
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• 제18권4호
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• pp.337-344
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• 1998

본(本) 시험(試驗)은 관리(管理)를 포기(抛棄)한 산지초지(山地草地)의 식생천이(植生遷移)를 조사(調査)하여 산지초지(山地草地) 관리(管理)에 이용(利用)코자 1993년부터 1996년까지 경기도 여주 야산지(野山地)에 조성(造成)한 초지(草地)에서 수행(遂行)되었던 바, 그 결과(結果)를 요약하면 다음과 같다. 1. 초지(草地)의 식생(植生)은 정지초지(整地草地)는 관리포기 후 l년차에, 임간초지(林間草地)는 방치후(放置後) 2년차에 식생이 가장 많이 변하였다. 2. 관리(管理)를 중단(中斷)한 후 초지식생(草地植生)의 생활형(生活型)은 미세지형(微細地形) 정지초지(整地草地)나 임간초지(林間草地) 공히 반지중식물(半地中植物), 지중식물(地中植物), 지표식물(地表植物)은 점차 감소하였으나, 1년생(年生) 식물(植物)과 어린나무를 포함한 관목류(灌木類)는 현저히 증가되었다. 3. 식생(植生)그룹간의 유사성(類似性)은 식생구성(植生構成) 초종(草種)에 따라 크게 영향을 받았는데, 이와 관련하여 초지(草地)의 식생구성(植生構成)이 비슷한 군락(群落)이 유클리드 거리계수(距離係數)가 가깝게 집단(集團)을 형성하였으며, 유사성(類似性)이 낮은 식생(植生)그룹은 유클리드 거리계수(距離係數)가 보다 먼 곳에서 서로 묶여지는 경향을 보였다. 미세지형(微細地形) 정지초지(整地草地)나 임간초지(林間草地) 공히 관리를 중단(中斷)하면 개량초지(改良草地)와는 다른 산지야초지(山地野草地)나 임야(林野)로 천이(遷移)되었다.

• 한국초지조사료학회지
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• 제18권4호
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• pp.329-336
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• 1998

본(本) 시험(試驗)은 산지초지(山地草地)에서 관리(管理)를 포기(抛棄)한 후 초지(草地)의 식생(植生), 생태적(生態的) 반응(反應), 초지(草地)의 사료가(飼料價) 및 현존량(現存量)의 변화를 조사하여 산지초지(山地草地) 관리(管理)에 이용코자 1993년부터 1996년까지 경기도 여주 야산지(野山地)에 조성(造成)한 초지(草地)에서 수행(遂行)되었던 바, 그 결과(結果)를 요약하면 다음과 같다. 1. 초지(草地)의 식생구성(植生構成)은 정지초지(整地草地)나 임간초지(林間草地) 모두 방치후(放置後) 야초(野草)와 관목류(灌木類)는 점차 증가하였으며, 목초(牧草)는 비교적 빨리 감소하는 경향을 보였다. 2. 초지(草地)의 수분가(水分價), 토양반응가(土壤反應價) 및 질소가(窒素價) 등 초지의 생태적(生態的) 반응(反應)은 미세지형(微細地形) 정지초지(整地草地) 및 임간초지(林間草地) 공히 크게 감소되는 경향을 보였다. 3. 초지(草地)의 사료가(飼料價)는 방치전(放置前) 정지초지(整地草地)는 7.06에서 방치후(放置後) 3년차는 4.60으로 임간초지(林間草地)는 방치전(放置前) 6.81에서 방치후(放置後) 3년차에는 4.38로 현저히 감소되었다. 4. 초지(草地)의 현존식생(現存植生) 생초량(生草量)은 방치전(放置前) $1.63{\sim}1.48kg/m^2$에 비하여 방치후(放置後) 3년차에는 $0.84{\sim}0.68kg/m^2$으로 48.5~54.1% 감소되었다.

• 한국초지조사료학회지
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• 제35권3호
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• pp.225-231
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• 2015

Improving current pasture productivity by precision management requires practical tools to collect site specific pasture biomass data. Recent developments in unmanned aerial vehicle (UAV) technology provide cost effective and real time applications for site specific data collection. For the mapping of herbage biomass (BM) on a hill pasture, we tested a UAV system with digital cameras (visible and near-infrared (NIR) camera). The field measurements were conducted on the grazing hill pasture at Hanwoo Improvement Office, Seosan City, Chungcheongnam-do Province, Korea on May 17 and June 27, 2014. Plant samples were obtained from 28 sites. A UAV system was used to obtain aerial photos from a height of approximately 50 m (approximately 30 cm spatial resolution). Normalized digital number (DN) values of Red and NIR channels were extracted from the aerial photos and a normalized differential vegetation index using DN ($NDVI_{dn}$) was calculated. The results show that the correlation coefficient between BM and $NDVI_{dn}$ was 0.88. For the precision management of hilly grazing pastures, UAV monitoring systems can be a quick and cost effective tool to obtain site-specific herbage BM data.

• 한국초지조사료학회지
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• 제14권4호
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• pp.264-270
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• 1994

This experiment was undertaken to determine the effect of pasture ages on the total production and seasonal yield trends, botanical composition and forage quality of pasture mixtures. This experiment was conducted at the Livestock Experiment Station, RDA, Suweon. The results obtained were as follows : 1. Total dry matterDM) yield of pasture mixtures was the highest in the first year, and thereafter no significant reduction in the 2nd through the 4th year, but decreased by 30% in the 5th year. 2. The 34.4% of total DM yield was produced at the first cut, and decreased from then on. Total DM yield of pasture mixtures varied by year and climatic facton. In 1992, Total DM and TDN yields of pasture mixtures were 13.4 and 8.5 IvlT/ha, respectively. 3. The content of crude protein(CP), in virro DM digestibility(IVDMD) and TDN of pasture mixtures were 12-14, 70-80, and 62-65%, respectively. The highest forage quality was obtained at the 4th cutting. 4. The botanical compositions of legumes and weeds were increased as the year of establishment advanced, and highly increased at the 3rd cut after summer growth. 5. Based on the results of this study it appears that economic forage production could be expended to the 4th year with proper management, and the special renovation techniques may be needed for maintenance of pasture yield from the 5th year.

• 한국초지조사료학회지
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• 제38권3호
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• pp.150-155
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• 2018

This study was conducted to determine grazing intensity of growing Korean native goats(Capra hircus coreanae) on mountainous pasture. It was carried out to obtain basic information for improvement of mountainous pasture management and establishing feeding system of Korean native goat. A total of 20 goats were grouped by feeding systems [A mountainous pasture grazing group (Concentrated feed of 1.5% body weight, treatment 1, T1, n=10) and a barn feeding group (TMR, treatment 2, T2), n=10] to conduct study from April to September. The average forage productivity of the mountain pasture was $500.9{\pm}61.41kg/ha$. The average dry matter intake in T1 was 0.64 and the calculated grazing intensity was 21 head/ha. In productivity, when the two treatments(T1, T2) were compared, the dry matter intake was about two to three times the difference. The average daily gain per day during the experiment was 63.3 in the mountain pasture and 120 g in barn feeding. When grazing, considering mountainous pasture productivity it is necessary to increase the productivity through proper feeding. The feed costs of black goats raised by grazing on the grassland in the same period showed an average 75% reduction compared to barn feeding. As a result of this study, it can be expected that a considerable reduction of feed costs can be expected in the breeding of Korean native black goat using the mountain pasture.

• 한국초지조사료학회지
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• 제16권3호
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• pp.183-189
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• 1996

The productivity and utilization of four different grasdlegume pastures for grazing management were examined. The pasture mixtures used in this study were orchardgrass + ladino clover (Tl), orchardgrass + alfalfa (T2), perennial ryegrass + alfalfa (T3), and orchardgrass (T4, without legumes) respectively. The pastures were mtationally grazed 7 times with growing cow which had an initial weight of ca 243kg. The gmwth of pasture plants, dry matter (DM) yield, DM distribution, daily DM production, and pasture utilization were investigated at the NLRI, in Suwon, from April to October in 1991 and 1992. The average plant height at each grazing was 32-33m. The average DM content was 17.8%, wil the lowest in TI (16.4%) and highest in T3 and T4 (18.4%). The annual DM production were 9,609 kg (T3), 9,420 kg (Tl), 9,402 kg (T2), and 9,194 kgha (T4) in that order, but no significant differences were found in forage yield between treatments. Most of forage DM was produced in spring season, particularly in May. The daily DM production was highest in May (81.9kg), and lowest in August (33.0kg/ha). The average efficiency of pasture utilization was about 79%, with the lowest in TI (77%), and highest level of utilization was observed in T4 (82%). In this experiment, production and utilization of each pastures were observed similarly. However, the forage nutritive value, botanical composition, and animal performance as affected by different pasture mixtures for suitable grazing management are needed to ascertain.