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

• 환경생물
• /
• 제35권3호
• /
• pp.398-412
• /
• 2017

산지초지의 효율적인 조성 및 관리를 위한 기초자료 마련을 위하여 강원도 대관령에 위치하는 산지초지에서 2014년~2016년 사이 식물상과 식생을 조사하였다. 그 결과, 관속식물은 38과 90속 104종 13변종 12아종으로 총 121분류군으로 조사되었다. 출현한 식물의 생활형 조성은 반지중식물-단립식물-중력산포형-직립형 ($H-D_4-R_5-e$)로 나타났다. 귀화식물은 5과 9속 12종으로 총 12분류군으로, 도시화지수는 3.7%, 귀화율은 9.9%를 나타냈다. 대관령 산지초지의 식물군락은 덤불조팝나무-꼬리조팝나무군락, 고마리군락, 흰겨이삭-큰조아재비군락으로 구분되었고, 흰겨이삭-큰조아재비군락은 세분하여 왕포아풀아군락, 쑥아군락, 김의털아군락, 애기수영아군락, 전형아군락으로 구분되었다. 이들 식물군락은 경사도와 EC에 크게 영향을 받는 것으로 나타났다. 특히 경사도 $40^{\circ}$ 이상에서는 원하는 목초의 정착이 이루어지지 않고, 관목림이 형성되었다. 따라서, 향후 산지초지의 조성 및 관리에 경사를 충분히 고려해야 할 것으로 판단한다.

• 한국초지조사료학회지
• /
• 제18권4호
• /
• pp.337-344
• /
• 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
• /
• 제35권3호
• /
• pp.225-231
• /
• 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
• /
• 제12권3호
• /
• pp.83-93
• /
• 1992

• 한국초지조사료학회지
• /
• 제18권3호
• /
• pp.251-258
• /
• 1998

To find out the effect of NPK-fertilization level and utilization method of pasture plants on the productivity of dry matter and nutrient of forages in hilly pasture, this experiment was arranged as a split block design with six treatments of 2 mainplots(N-$P_2O_5$-$K_2O$=210-150-180(wntrol), 280-200-240Kg/ha) and 3 subplots (cutting, grazing cutting+grazing alternative), and conducted at hilly land in Yeoju, Kyonggi Province 6om February, 1992 to October, 1993. In the treatment of grazing the early growth and cover degree of pasture plants wintered were more favorable. With increased NPK-application for two years, the average dry matter(DM) yield of 9,862kglha was incerased by 18% than that of the control, and the average DM yield of the cutting treatment of 10,434kaa was higher than that of others. In all treatments for two years, the average DM yield was composed of 94.0~95.1% grasses, 1.8~2.0% legumes and 2.8~4.2% weeds. The crude protein and energy productivity of forages in the treatment with increased NPK-fertilizer application increased by 20~23% than those of control, and those of cutting treatment were greatly increased than those of the grazing treatment. The average mineral content of forages in all treatments tended to be similar, Ca and Mg content and Ca/P ratio were slightly lower, and K content and K/(Ca+Mg) equivalent ratio of forages tended to be higher than the most desirable value of forages.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.325-325
• /
• 2017

In the 20th century, the average temperature of Korea has risen by $1.5^{\circ}C$, whereas it has risen by $0.6^{\circ}C$ globally. Few studies have investigated the effect of seeding date in hilly pastures on their growth characteristics and productivity. The purpose of this study was to elucidate the effect of seeding dates at a hilly pasture establishment on its growth characteristics and productivity caused by increasing temperatures in Korea. The experiments were conducted from 2014 to 2016 at Pyeongchang, South Korea, at an altitude 600-700 m above sea level. The composition of grass mixture was tall fescue, orchard grass, perennial ryegrass, Kentucky bluegrass, timothy, and white clover. Treatments comprised four seeding dates (August 13 and 27, and September 10 and 24). The establishment rate was lowest on September 24, resulting in only 20% establishment over the winter, and the proportion of weeds was highest on September 24 (58%). Early seedling growth before overwintering is a critical approach to ensure successful establishment of grassland. The main components were orchard grass and tall fescue on the early seeding date (August 13), and Kentucky bluegrass on the late seeding date (September 24). Late seeding increased the proportion of bare lands invaded by weed species, especially during second and third cutting periods. Early seeding date resulted in a progressive increase in biomass. Total annual production was significantly affected by the seeding date; lowest dry matter production was on September 24 ($2,441kg\;ha^{-1}$), whereas maximum dry matter yield was on August 27 ($6,608kg\;ha^{-1}$). The results of the study indicate that growth condition and productivity could be increased by early seeding, and seeding of grass in the Pyeongchang area should be completed before August 27. However, further studies are needed to determine the ideal seeding date at the hilly pasture establishment in Pyeongchang.

• 한국초지학회:학술대회논문집
• /
• 한국초지조사료학회 2005년도 학술심포지엄, 제43회 학술발표회
• /
• pp.202-203
• /
• 2005

• 한국초지조사료학회지
• /
• 제16권4호
• /
• pp.260-266
• /
• 1996

To find out the residual effect of phosphate fertilization level on the dry matter yield and nutrient plloductivity of pasture plants, this experiment was arranged as a randomized complete block design with six treatments(0-0, 50-50, 100-65, 150-65, 200-65 and 250-65kg $P_2O_5$), those were composed of three $P_2O_5$ fertilization level(0,50 and 65kg $P_2O_5$ after phosphate fertilization trial with six treatments(0, 50, 100, 150, 200 and 250kg $P_2O_5$/ha) from 1989 to 1992, and conducted at hilly land in Kwangju, Kyonggi Province from 1993 to 1994. The results obtained are summarized as follows : As the available phosphate of soil increase, the early growth and cover degree of pasture plants wintered were more favorable. With 150-65kg $P_2O_5$ application for two years, the average dry matter yield of grasses, 9,862kglha was similared to that of 200-65kg $P_2O_5$/ha. The crude protein and energy productivity of pasture plants tended to increase as available phosphate of soil was increased, but those were not different between 150-65 and 250-65kg P 2 0 4 a Efficiency of $P_2O_5$ was highest at $P_2O_5$ 150-65kg/ha fertilization, wHich produced dry matter 11 1.8kg. net energy lactation(NEL) 67 1.2M.f per I kg P205. Therefore, phosphate fertilization is recommended strongly application with 150kg/ha for three years after pasture establishment, and then 65kg/ha for two years a reasonabl management in hilly grassland.

• 한국초지조사료학회지
• /
• 제17권4호
• /
• pp.329-344
• /
• 1997

To improve germination and growth of forages of hill pasture seeds of several forages were osmotically primed with polyethylene glycol (PEG) under different PEG concentrations, treatment periods, and temperatures. Seeds were coated with several materials, and tested for germination. The best primed or coated seeds in germination tests were surface sow on hilly area. The results obtained are summarized as follows; 1. Osmotic priming with PEG accelerated germination of forages and reduced time taken for germination. 2. Germinability was best when the seeds of Tama ryegrass or orchardgrass were treated for 6-9 days at 30g PEG1100 ml water, red clover or white clover for 3, or 9 days in 20g PEG1100 ml water at $10^{\circ}C$. 3. Priming seeds of Tama ryegrass or orchardgrass in 30% PEG solution for 6 days, and seeds of red clover or white clover in 20% PEG solution for 6 days at $15^{\circ}C$ were most effective in germination, similar to priming at $10^{\circ}C$ . 4. Priming seeds of Tama ryegrass at 15C, and orchardgrass, red clover, or white clover at $10^{\circ}C$ were effective in germination than priming at other temperatures. 5. Osmotic priming with PEG accelerated germination of forages compared to coated seeds in Petri-dishes, while coated seeds germinated more slowly, but showed better emergence and superior growth to those of primed or intact seeds in the field. 6. Priming seeds increased yield slightly, and coating seeds significantly increased its yield on hilly area.