• 한국초지조사료학회지
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• 제37권1호
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• pp.80-91
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• 2017

본 연구는 기후요인을 이용한 혼파초지 수량예측모형을 기초로 하여 시비, 파종 및 조성연차 요인을 단계적으로 적용하여 해석력이 높은 모형을 선정하는데 목적이 있다. 혼파초지 수량예측모형 구축 과정은 자료(풀사료 및 기상자료)수집, 가공, 분석 및 모형 구축의 순이었다. 여기서 수량예측모형은 기후, 시비, 파종 및 조성연차 요인을 고려하여 6가지를 구축하였으며, 해석력 및 풀사료 생산 이론 측면의 검토를 통해 최적의 모형을 선택하였다. 그 결과 기후, 시비 및 파종과 조성연차(조성연차의 그룹화) 요인을 고려한 Model VI이 선택되었다(해석력=53.8%). Model VI의 요인 별 해석력은 기후요인이 가장 크고(24.5%) 시비(17.8%), 파종(10.7%) 및 조성연차(0.8%) 요인의 순이었다. 그러나 건물수량과 하고일수 간에 나타난 정(+)의 상관관계는 지역별 및 적산변수 등의 관점에서 검토가 필요하다. 또한 시비량 및 파종량은 특정값에 집중적으로 분포하고 있어 이차항(Quadratic term)을 이용하여 적정 수준에 관한 연구가 요구된다.

• 한국초지조사료학회지
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• 제20권2호
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• pp.131-138
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• 2000

This experiment was carried out during the period from September, 1997 to October, 1998 to determine the effect of fermented saw-dust pig manure (FSP) application on the herbage production on a mixed pasture in the Cheju brown volcanic ash soil. Split plot design (main plot: 3 nitrogen application levels of 0, 150 and 300 kgiha; sub plot: 4 pig sawdust manure levels of 0, 3, 6 and 12 tonha) was used. Plant height and dry matter yield increased significantly with an increase of nitrogen and FSP level. There was no difference in the botanical composition of grasses as affected by FSP application level, but herbage yields of grass species were increased by nitrogen application compared to that without nitrogen application. Botanical composition of white clover decreased with an increase of nitrogen application, but increased with an increase of FSP application level. Percentages of weeds were not affected by application rates of chemical nitrogen fertilizer and swine manure in the mixed species pasture. Nitrogen, phosphorus, and potassium contents of species in the pasture significantly increased with increasing application rates of nitrogen fertilizer. In conclusion, it would be an optimum to apply 150 kgha of inorganic chemical fertilizer and plus either 3 or 6 toniha of fermented swine manure with sawdust for optimum production of mixed pasture on Cheju Island. (Key words : Herbage production, Botanical composition, Morphology, Plant mineral contents)

• 한국토양비료학회지
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• 제11권4호
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• pp.263-269
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• 1979

Pasture establishment techniques successfully employed in the alpine region of Korea are outlined. The subsequent management of the mixed grass/legume pasture to maintain a high producing sward is also described. Relevant overseas literature has been reviewed and related to the methods in use at the ROK/NZ Beef Farming Research and Demonstration Project in the alpine region of Kangweon-do.

• Asian-Australasian Journal of Animal Sciences
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• 제27권3호
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• pp.422-430
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• 2014

Pasture-based automatic milking systems (AMS) require cow traffic to enable cows to be milked. The interval between milkings can be manipulated by strategically allocating pasture. The current experiment investigated the effect of replacing an allocation of grazed pasture with grazed soybean (Glycine max) with the hypothesis that incorporating soybean would increase voluntary cow traffic and milk production. One hundred and eighty mixed age, primiparous and multiparous Holstein-Friesian/Illawarra cows were randomly assigned to two treatment groups (n = 90/group) with a $2{\times}2$ Latin square design. Each group was either offered treatments of kikuyu grass (Pennisetum clandestinum Hoach ex Chiov.) pasture (pasture) or soybean from 0900 h to 1500 h during the experimental period which consisted of 2 periods of 3 days following 5 days of training and adaptation in each period with groups crossing over treatments after the first period. The number of cows trafficking to each treatment was similar together with milk yield (mean ${\approx}18$ L/cow/d) in this experiment. For the cows that arrived at soybean or pasture there were significant differences in their behaviour and consequently the number of cows exiting each treatment paddock. There was greater cow traffic (more cows and sooner) exiting pasture allocations. Cows that arrived at soybean stayed on the allocation for 25% more time and ate more forage (8.5 kg/cow/d/allocation) relative to pasture (4.7 kg/cow/d/allocation). Pasture cows predominantly replaced eating time with rumination. These findings suggest that replacing pasture with alternative grazeable forages provides no additional incentive to increase voluntary cow traffic to an allocation of feed in AMS. This work highlights the opportunity to increase forage intakes in AMS through the incorporation of alternative forages.

• 한국초지조사료학회지
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• 제43권4호
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• pp.199-205
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• 2023

Pasture formation and management are crucial to avoid yield reduction. This experiment aimed to examine the effects of tall fescue-centered mixed-seeding combinations on yield and vegetation changes in perennial pastures in the central region for two years, from September 2020 to October 2022. The treatments were arranged in three replications in a randomized block design: control (C), tall fescue-based mixture-1 (T-1), and tall fescue-based mixture-2 (T-2). The tall fescue (TF), orchard grass (OG), perennial ryegrass (PRG), Kentucky bluegrass (KBG), and white clover (WC) were used. The emergency rate of grasses (70.0 to 73.3%) did not differ among mixed seeding combinations. Overwintering rates (81.7 to 83.3%) were similar among treatments. The plant height of grasses was similar at each harvest date, with the highest height (86.2 cm) recorded in the second harvest of the first year, followed by that (58.4 cm) in the third harvest of the first year; it was least (38.9 cm) in the fourth harvest of the second year. There was no significant difference in the dry matter yield of grasses among the mixed seeding combination treatments in the first, third, or fourth harvests of the first year (p>0.05). For second-year grasses, dry matter yield was not significantly different in harvest date among the treatments (p>0.05). Based on mixed seeding ratio, orchard grass showed the highest yield at 70% in the C treatment, followed by tall fescue at 80% and 60% in the T-1 and T-2 treatments, respectively, in the first harvest after seeding. There was no significant difference in feed value between treatments (p>0.05), but a significant difference was observed between the third and fourth harvest (p<0.05). Therefore, it indicated that it is important to create perennial pastures in the central region through mixed seeding combinations centered on tall fescue.

• 한국초지조사료학회지
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• 제11권4호
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• pp.215-221
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• 1991

혼파된 영년채초지에서의 예취빈도와 질소시비가 뿌리의 수량과 심층분포에 미치는 영향에 대하여 연구된 결과는 다음과 같다. 1. 조사된 식생구조에서의 뿌리의 분포는 모든 처리구에서 상층 20cm까지에 그 대부분이 존재하였다. 2. 뿌리의 양은 우점종에 관계없이 모두 높았지만 Arrhenatherum elatius 우점초지에서 가장 낮았고 Alopecurns pratensis우점초지에서 가장 높았다. 3.뿌리의 양은 예취빈도간에는 그 차이가 없었으나 적당한 N 시비수준(N-2)에서 가장 높았다. 4. 뿌리의 심층분포는 모든 처리구에서 1m 길이까지 존재하였다.

• 한국초지조사료학회지
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• 제38권1호
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• pp.53-60
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• 2018

본 연구는 혼파초지 수량예측모형에서 기후특성이 뚜렷한 지역의 자료 제거 및 지역별 구분을 통해 건물수량과 하고일수 간 상관관계를 검토하였다. 데이터세트는 총 582점으로 11개 지역으로 분류되며 혼파조합은 총 41가지였다. 변수에서 반응변수는 건물수량 이었으며 설명변수는 하고일수를 포함한 5가지의 기상변수를 이용하였다. 통계방법은 산점도, 기술통계량 및 상관분석을 거쳐 다중회귀분석을 통해 건물수량과 하고일수 간 상관관계를 확인하였다. 산점도 분석 결과 데이터세트를 지역별로 구분하였을 때 9개 지역 중 7개에서 건물수량과 하고일수 간 부(-)의 상관관계가 나타나 지역을 구분할 필요가 있었으며 대표본 근사이론을 적용할 수 있었던 5개 지역(화성, 수원, 대전, 시흥 및 광주)을 선정하였다. 5개 지역의 상관분석 결과 3개 지역(화성, 수원 및 시흥)에서, 다중회귀분석결과 화성에서 건물수량에 대한 하고일수의 효과가 부(-)로 나타났다. 따라서 혼파초지의 건물수량에 대한 하고일수의 상관관계는 지역별로 구분하였을 때 풀사료 생산이론과 일치하여 수량예측모형의 정밀도를 높일 수 있을 것으로 판단하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제32권2호
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• pp.201-208
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• 2019

Objective: The aim of the present study was to identify the impact of early weaning of lambs at approximately seven weeks of age onto a herb-clover mix on the liveweight gain of lambs and their dams. Methods: In 2015, twin-born lambs that weighed a minimum of 16 kg (n = 134) were randomly allocated to one of three treatments: i) Early-weaned (58 days after the midpoint of lambing) onto an unrestricted allowance (>1,200 kg dry matter/ha) of herb-clover mix (HerbEW); ii) Lambs+dams unweaned onto an unrestricted allowance of herb-clover mix until conventional weaning (95 days after the midpoint of lambing) (HerbCW); iii) Lambs+dams unweaned onto an unrestricted allowance of grass-clover pasture until conventional weaning (GrassCW). In 2016, twin-born lambs that weighed a minimum of 16 kg (n = 170) were randomly allocated to one of four treatments: i), ii), iii) (similar to 2015) and iv) Lambs+dams unweaned onto a restricted allowance (<1,200 kg dry matter/ha) of grass-clover pasture until conventional weaning (93 days after the midpoint of lambing) (Restricted-GrassCW). Results: In 2015, liveweight gain from L58 to L95 of HerbCW and GrassCW lambs did not differ (p>0.05), but were greater than HerbEW lambs. In 2016, HerbCW lambs had greater (p<0.05) liveweight gains from L51 to L93 than GrassCW followed by HerbEW and Restricted-GrassCW lambs. In 2015, liveweight gain from L58 to L95 of HerbEW ewes were greater than both GrassCW and HerbCW ewes while in 2016, liveweight gain of from L51 to L93 GrassCW and HerbCW ewes did not differ (p>0.05) but were greater (p<0.05) than those of HerbEW and Restricted-GrassCW ewes. Conclusion: These results indicate that when grass-clover pasture supply can be maintained at unrestricted intake level, there may be no benefit of weaning lambs early. However, at restricted pasture conditions lambs can achieve greater liveweight gains when weaned early onto a herb-clover mix.

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

• Journal of Dairy Science and Biotechnology
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• 제36권4호
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• pp.196-207
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• 2018

This study was carried out to investigate the rheological properties and composition of unsaturated fatty acid of farm butter made from the milk of cows grazing at high mountain pasture in Pyronogchang SKY ranch (above sea level, 935 m). From two groups containing 7 cows each, a group was fed in-door with TMR (total mixed ration) feed and whereas the other group was grazed pastures for 12 h. The daily intake of feed on basis of dry matter (DMI), milk yields, concentration of milk constituents, and fatty acid profile of pasture milk were compared with control TMR milk. In addition, the physiochemical properties and composition of unsaturated fatty acids of the butter were also compared with those of the butter made from control TMR milk. Upon comparison, the health-promoting index (HPI) of fatty acids; the ratio of omega-6 fatty acids to omega-3 fatty acids (n-6 to n-3 UFA), the atherogenicity index (AI), and the ratio of linoleic acid to ${\alpha}$-linolenic acid (LA to ALA) was apparently improved in farm butter than those of control butter. Thus, it could make the dairy farm visitors to consume the farm butter containing the health-promoting fatty acids from the milk of cows grazing on mountain pasture.