Kim, J.D.
(Industry Academic Cooperation Foundation, Cheonan Yonam College)
,
Kwon, C.H.
(Division of Animal Husbandry, Cheonan Yonam College)
,
Shin, C.N.
(Department of Animal Production, Keymung College)
,
Kim, C.H.
(Department of Animal Life and Resources, Hankyong National University)
,
Kim, D.A.
(School of Agricultural Biotechnology, Seoul National University)
The objective of this experiment was to determine agronomic characteristics, and forge yield and quality responses of rye variety to location and year for a double-cropping system in South Korea. Five forage rye varieties ('Koolgrazer', 'Jlee select', '9909', 'Homill22', 'Danko') were evaluated for ...
The objective of this experiment was to determine agronomic characteristics, and forge yield and quality responses of rye variety to location and year for a double-cropping system in South Korea. Five forage rye varieties ('Koolgrazer', 'Jlee select', '9909', 'Homill22', 'Danko') were evaluated for forage quality and yields during the two growing years (the First year; 2001-2002, and the Second year; 2002-2003) at two locations (the central and southern zone). The heading date of rye in the central zone (Cheonan) was 15 April, and that of the southern zone (Daegu) was 10 April. The heading dates of 'Koolgrazer', 'Jlee select' and '9909' were earlier than those of the others. Although the five varieties had resistance to foliar diseases and insects, these had less lodging resistance. Dry matter (DM) content, DM and total digestible nutrients (TDN) yields had significant differences among rye varieties. DM and TDN yields of the rye varieties at the second year were higher than the first year in the central zone. In the southern zone, DM and TDN yields at the first year were lower than the second year. 'Jlee select' and '9909' had higher DM and TDN yields than the other varieties in both location and year except the first year of the central zone (p<0.001). The crude protein (CP) contents of rye grown in Cheonan were higher than Daegu. The CP content of 'Danko' variety was highest among tested varieties. The acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents were greater for the varieties grown in Cheonan and in the second year. The ADF and NDF contents of 'Danko' were lowest, while 'Danko' in TDN and relative feed value (RFV) was highest among rye varieties. Our study showed that there are differences in forage production and quality from location to location, year to year and variety to variety. Therefore, forage quality and forage production are an important factor for screening forage rye varieties. Early maturing varieties should be recommended as high-yielding forage in a double-cropping system because their production of forage was greatest early in the season.
The objective of this experiment was to determine agronomic characteristics, and forge yield and quality responses of rye variety to location and year for a double-cropping system in South Korea. Five forage rye varieties ('Koolgrazer', 'Jlee select', '9909', 'Homill22', 'Danko') were evaluated for forage quality and yields during the two growing years (the First year; 2001-2002, and the Second year; 2002-2003) at two locations (the central and southern zone). The heading date of rye in the central zone (Cheonan) was 15 April, and that of the southern zone (Daegu) was 10 April. The heading dates of 'Koolgrazer', 'Jlee select' and '9909' were earlier than those of the others. Although the five varieties had resistance to foliar diseases and insects, these had less lodging resistance. Dry matter (DM) content, DM and total digestible nutrients (TDN) yields had significant differences among rye varieties. DM and TDN yields of the rye varieties at the second year were higher than the first year in the central zone. In the southern zone, DM and TDN yields at the first year were lower than the second year. 'Jlee select' and '9909' had higher DM and TDN yields than the other varieties in both location and year except the first year of the central zone (p<0.001). The crude protein (CP) contents of rye grown in Cheonan were higher than Daegu. The CP content of 'Danko' variety was highest among tested varieties. The acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents were greater for the varieties grown in Cheonan and in the second year. The ADF and NDF contents of 'Danko' were lowest, while 'Danko' in TDN and relative feed value (RFV) was highest among rye varieties. Our study showed that there are differences in forage production and quality from location to location, year to year and variety to variety. Therefore, forage quality and forage production are an important factor for screening forage rye varieties. Early maturing varieties should be recommended as high-yielding forage in a double-cropping system because their production of forage was greatest early in the season.
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문제 정의
Therefore, the objective of this experiment was to determine forage yield and quality responses of rye variety to location and year.
제안 방법
A subsample (800 to 1,000 g) was randomly selected from each harvested plot to estimate DM content and provide samples for forage quality analysis. The samples were weighed and dried for 72 h by forced-air drying oven at 65°C.
5x4 m). Fertilizer was broadcasted at 150, 100 and 100 kg ha-1 of N, P and K, respectively (Table 1).
대상 데이터
Planting dates were 26 September 2001 and 2 October 2002 at Cheonan and 18 October 2001 and 3 October 2002 at Daegu. Harvesting dates were 20 April 2002 and 28 April 2003 at Cheonan and 19 April 2002 and 22 April 2003 at Daegu (Table 2).
The samples were weighed and dried for 72 h by forced-air drying oven at 65°C. The dried samples were reassembled and ground through a 1 mm screen in a Wiley mill.
The experiment was conducted at two locations, Cheonan in the central zone and Daegu in the southern zone over a 2-yr period, 2001-2002 and 2002-2003. The soil at Cheonan was silt loam, and the soil at Daegu was sandy loam.
The experimental design was a randomized complete block in a split-split arrangement with three replications. Main plots consisted of two locations (the central zone and the southern zone), subplots consisted of two years (2001 2002 and 2002-2003), and sub-sub plots consisted of five rye varieties; ‘Koolgrazer’，‘Jlee select’，‘9909’，‘Homil22’ and ‘Danko’.
데이터처리
Data were analyzed with analysis of variance (ANOVA) procedures using the SAS statistical software package (1999). The mean separation among treatment means for location, season and variety was obtained by using the Least Significant Difference (LSD) test (Steel and Torrie, 1980).
이론/모형
Crude protein (CP) was determined by the Kjeldahl method (AOAC, 1990), acid detergent fiber (ADF) and neutral detergent fiber (NDF) were measured by the methods of Goering and Van Soest (1970).
Data were analyzed with analysis of variance (ANOVA) procedures using the SAS statistical software package (1999). The mean separation among treatment means for location, season and variety was obtained by using the Least Significant Difference (LSD) test (Steel and Torrie, 1980). Effects were considered in all statistical calculations for p-values<0.
성능/효과
While conventional thought is that a superior forage rye must have superior forage production, data from this study suggest that the rye varieties with equal forage production do indeed have differences in forage quality. On the basis of the findings in our study, the selection of variety may even be more important than high production so that the effects of low fiber composition could improve animal productivity. Utilization of forage rye in the field, therefore, should consider both quality and forage production.
참고문헌 (16)
AOAC. 1990. Official Method of Analysis (15th ed.). Association of Official Analytical Chemists. Washington, DC.
Brundage, A. L., R. L. Taylor and V. L. Burton. 1979. Relative yields and nutritive value of barely, oat, and peas harvested at four successive dates for forage. J. Dairy Sci. 62:740-745.
Elizalde, J. C., N. R. Merchen and D. B. Faulkner. 1999. Fractionation of fiber and crude protein in fresh forage during the spring growth. J. Anim. Sci. 77:476-484.
Firdous, R. and A. H. Gilani. 2001. Changes in chemical composition of sorghum as influenced by growth stages and cultivar. Asian-Aust. J. Anim. Sci. 14:935-940.
Go, H. J. 2001. Yield and quality of forage mixture as affected by maturity of rye cultivar and oat-rye seeding rate. MS thesis. Seoul National University, Korea.
Goering, H. L. and P. J. Van Soest. 1970. Forage Fiber Analysis. Agric. Hand. No. 379. USDA.
Holland, C., W. Kezar, W. P. Kautz, E. J. Lazowski, W. C. Mahanna and R. Reinhart. 1990. The pioneer forage manual-A nutritional guide. Pioneer Hi-Bred Int. Inc., Des Moines, IA.
Jung, H. G. and M. S. Allen. 1995. Characteristics of plant cell walls affecting intake and digestibility of forages by ruminants. J. Anim. Sci. 73:2774-2790.
Kim, J. D., C. H. Kwon and D. A. Kim. 2001a. Yield and quality of silage corn as affected by hybrid maturity, planting date and harvest stage. Asian-Aust. J. Anim. Sci. 14(12):1705-1711.
Kim, J. G., E. S. Chung, S. Seo, J. S. Ham, W. S. Kang and D. A. Kim. 2001b. Effects of maturity at harvest and wilting days on quality of round baled rye silage. Asian-Aust. J. Anim. Sci. 14(9):1233-1237.
Kim, S. G. 2004. Forage performance evaluation in winter rye cultivars. Ph. D. Thesis. Seoul National University, Korea.
Kwon, C. H. and D. A. Kim. 1994. Effect of seeding and harvesting dates on the growth, yield and nutritive value of early and late maturing varieties of forage rye (Secale cereale L.). J. Kor. Grassl. Sci. 14(4):316-323.
SAS Institute, Inc. 1999. SAS user's guide: Statistics. SAS Inst., Inc., Cary, NC.
Steel, R. G. D. and J. H. Torrie. 1980. Principles and procedures of statistics. A biometric approach. McGraw-Hill, New York, NY.
Yu, P., D. A. Christensen, J. J. McKinnon and H. W. Soita. 2004. Using chemical and biological approaches to predict energy values of selected forages affected by variety and maturity stage: Comparison of three approaches. Asian-Aust. J. Anim. Sci. 17(2):228-236.
Williams, C. C., M. A. Forestchel, L.O. Ely and H. E. Amos. 1995. Effects of inoculation and wilting on the preservation and utilization of wheat forage. J. Dairy Sci. 78:1755-1767.
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