[논문]Comparison of Forage Quality, Productivity and β-carotene Content according to Maturity of Forage Rye (Secale cereale L.)

Zhao, Guo Qiang; Wei, Sheng Nan; Li, Yan Fen; Jeong, Eun Chan; Kim, Hak Jin; Kim, Jong Geun

doi:10.5333/kgfs.2020.40.3.123

[국내논문] Comparison of Forage Quality, Productivity and β-carotene Content according to Maturity of Forage Rye (Secale cereale L.) 원문보기

한국초지조사료학회지 = Journal of the Korean Society of Grassland and Forage Science, v.40 no.3, 2020년, pp.123 - 130

Zhao, Guo Qiang (Graduate School of International Agricultural Technology, SNU) , Wei, Sheng Nan (Graduate School of International Agricultural Technology, SNU) , Li, Yan Fen (Graduate School of International Agricultural Technology, SNU) , Jeong, Eun Chan (Graduate School of International Agricultural Technology, SNU) , Kim, Hak Jin (Research Institute of Eco-friendly Livestock Science, GBST, SNU) , Kim, Jong Geun (Graduate School of International Agricultural Technology, SNU)

Abstract ▼ AI-Helper

These experiments were to investigate the variations of rye on forage quality, productivity and β-carotene concentration affected by maturity in Pyeongchang region. Limited information are available about how forage quality and β-carotene content are affected by various factors. Samples were collected from rye harvested every 5 days, from April 25 to May 31 (April 25, April 30, May 4, May 9, May 15, May 21, May 25 and May 31). Dry matter (DM) content, plant height, DM yield and total digestible nutrient (TDN) yield increased continuously with the progressed maturity. However, crude protein (CP) content, in vitro dry matter digestibility (IVDMD) and relative feed value (RFV) decreased markedly with the delay of harvesting, while TDN content decreased from April 25 till May 15, then followed by a stable fluctuation. Conversely, acid detergent fiber (ADF) and neutral detergent fiber (NDF) value increased and then fluctuated slightly after blooming stage. For quality of plant parts, stem contained the lowest CP content and RFV value, and the highest ADF and NDF contents compared with other parts, while the grain showed the higher CP, IVDMD, RFV and lower fiber contents than others. With the plant matured, leaf proportion decreased while stem and grain proportion increased, and feed value of all the three parts decreased till blooming stage and followed by a stable phase. β-carotene concentration showed its highest on jointing stage, and then fell down sharply on the sequential stages. In conclusion, harvest around May 15 (blooming) is proper for forage rye if directly consumed by livestock as green chop in Pyeongchang under the consideration of both nutritive yield and forage quality.

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문제 정의

The purpose of this experiment to investigate the variations of rye in forage quality and β-carotene concentration affected by harvest dates.

대상 데이터

The experiment was carried out in experimental field of Seoul National University, Pyeongchang Campus (located at 37°32′46.1″N, 128°26′17.9″E, where, average altitude is about 600-700 m above sea level, more information are registered as annual mean temperature 11.5 ℃, average annual precipitation 113.4 mm, average annual wind speed 1.1 m/s, average annual humidity 68.0 %, Sin-ri, Pyeongchang, Republic of Korea) from September 30 to May 31.
For in vitro dry matter digestibility (IVDMD) analysis, the two-stage technique (Tilley and Terry, 1963) was used. The samples were placed into the Ankom Daisy^ⅡIncubator digestion jars (Ankom Technologies, Inc., Fairport, NY, USA) with 266 ml of buffer solution B and 1330 ml of buffer solution A (1:5 ratios, v/v), the reagents contained in buffer A and B are shown in Table 1. Rumen fluid was collected from two healthy cannulated Holstein steers before morning feed.

이론/모형

Acid detergent fiber (ADF) and neutral detergent fiber (NDF) were measured by the method of Van Soest et al. (1991) using “ANKOM2000 Automated Fiber Analyzer” (Ankom Technologies, Inc., Fairport, NY, USA).
Crude protein was determined via Dumas method as described by Jean-Baptiste Dumas, (1884) using “Automatic Elemental Analyzer Euro Vector EA3000”(EVISA Co., Ltd, Milan, Italy).
Data were analyzed by the general linear model (GLM) procedure of SAS 2002 (version 9.1). The complete random design was used for effect of harvest dates on rye forage quality and the split plot design was used for effect of plant parts (main plot) and harvest dates (sub plot), Differences were considered to be significant when P < 0.
For in vitro dry matter digestibility (IVDMD) analysis, the two-stage technique (Tilley and Terry, 1963) was used. The samples were placed into the Ankom Daisy^ⅡIncubator digestion jars (Ankom Technologies, Inc.

성능/효과

β-carotene concentration showed its highest on jointing stage, and then fell down sharply on the sequential stages. In conclusion, harvest around May 15 (blooming) is proper for forage rye if directly consumed by livestock as green chop in Pyeongchang under the consideration of both nutritive yield and forage quality.
, 1990). The rye forage quality harvested with maturity in this study was defined as prime, excellent, good and fair, respectively, from April 25 (jointing stage) to May 9 (heading stage), however, RFV of rye harvested after heading all fell into the grade of poor, as the lowest level 79 appeared on May 15 (blooming stage) and the highest, 156, appeared on April 25 (jointing stage).

질의응답

핵심어	질문	논문에서 추출한 답변
	농부들이 여전히 Rye를 경작하는 것을 선호하는 지역은 어떤 특징이 있는가?	) is recognized as an important forage crop in Korea and can be cultivated even in cold, droughty areas and barren soil. Recently, the cultivation area of rye has decreased due to the popularity of Italian ryegrass, but farmers still prefer it in the mid-northern and mountainous regions where the winter is severe. Rye is a hardy grain, it is more tolerant of frost and drought than wheat (Allen, 2013).
	cultivation area of rye이 줄어들고 있는 이유는 무엇인가?	) is recognized as an important forage crop in Korea and can be cultivated even in cold, droughty areas and barren soil. Recently, the cultivation area of rye has decreased due to the popularity of Italian ryegrass, but farmers still prefer it in the mid-northern and mountainous regions where the winter is severe. Rye is a hardy grain, it is more tolerant of frost and drought than wheat (Allen, 2013).
	Rye의 특징은?	Rye (Secale cereale L.) is recognized as an important forage crop in Korea and can be cultivated even in cold, droughty areas and barren soil. Recently, the cultivation area of rye has decreased due to the popularity of Italian ryegrass, but farmers still prefer it in the mid-northern and mountainous regions where the winter is severe.

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