• Korean Journal of Organic Agriculture
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• v.16 no.2
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• pp.219-230
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• 2008

This trial was conducted to assess effects of cattle slurry application on productivity and feed values of barley and hairy vetch when they were influenced by single or mixed-sowed cultivation in paddy fields, and to obtain good quality of organic forage resources. The results summarized are as follows. For barley and hairy vetch, single-sowed cultivation was lower in annual dry matter (DM) and total digestible nutrients (TDN) yields than mixed-sowed (P<0.05). Although crude protein (CP) contents for the barley within single-sowed treatments were lowest as 6.5%, those of hairy vetch within the same sowed method were highest as 16.7%. However, mixed-sowed cultivation with barley and hairy vetch, showing 13.8% CP content, was significantly (P<0.05) higher than CP and relative feed value (RFV) of barley alone treatment. For barley alone treatment, cattle slurry application significantly increased annual DM and TDN yields in comparison with treatments of P+K fertilization as chemical fertilizers and no fertilizer as controls. Results from cattle slurry application showed 84% and 82% in contrast with chemical fertilizer for annual DM and TDN yields, respectively. For mixed-sowed cultivation with barley and hairy vetch, cattle slurry application showed 90% and 94% annual DM and TDN yields, respectively as compared with N+P+K fertilization as chemical fertilizers. Crude protein contents ($14.2{\sim}15.9%$) for cattle slurry application treatments were significantly (P<0.05) higher than those of other treatments. Moreover, cattle slurry application treatment had the highest TDN and RFV among treatments, showing $60.7{\sim}61.8%$ and $112.2{\sim}118.1$, respectively. For hairy vetch alone treatments, annual DM and TDN yields of cattle slurry alone application treatment were highest among fertilization treatments. Furthermore, CP, TDN and RFV of cattle slurry alone application treatments were significantly (P<0.05) higher than those of other treatments. The results showed that mixed-sowed cultivation rather than single-sowed for barley or hairy vetch improved their nutritive value and quality, and also within mixed-sowed cultivation, cattle slurry application increased production yield per ha and CP contents. In the application of above system to organic livestock farming, it would be expected that forages produced by cattle slurry application under mixed-sowed method might become a substitute for foreign organic grain as protein sources.

• Journal of The Korean Society of Grassland and Forage Science
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• v.23 no.2
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• pp.121-128
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• 2003

This study was conducted to investigate the effect of tall type mixtures and tall+short type mixtures on dry matter yield, botanical composition and quality. The experimental design includes two mixture types: Tall type mixtures(TM); orchardgrass(Potomac) 40+tall fescue(Fawn) 20+Festulolium braunii (Paulita) 10+perennial ryegrass(Reveille) 10+timothy(Climax) 10+red clover(Kenland) 5+alfalfa(Vernal) 5%) and tall+short type mixtures(TSM); orchardgrass(Potomac) 40+tall fescue(Fawn) 20+Kentucky bluegrass(Newport, turf type) 10+redtop(Barricuda, turf type) 10+perennial ryegrass(Palmer III, turf type) 10+red fescue(Flyer II, turf type) 5+white clover(Regal) 5%. The dry matter(DM) yield was higher obtained in TSM than that of TM, but there was no significant difference between TM and TSM. In the chemical composition, there was no significant difference between TM and TSM, but the content of cellulose, lignin were higher in TM than those in TSM(p<0.05). Also, the content of acid detergent fiber which affected dry matter digestibility was higher in TM than that of TSM. The crude protein dry matter yield was not observed significant difference between TM and TSM, but digestible dry matter(DDM) yield was higher in TSM than that of TM. In botanical composition, tall fescue, alfalfa and orchardgrass were highly maintained in TM but white clover, tall fescue and orchardgrass were highly, and redtop, red fescue were continuously maintained in TSM. In this experiment, DM yields and quality of two mixture types were no difference. However, the tall+short type mixtures(TSM) were more effective in enhancing the dry matter digestibility and DDM yield, and in maintaining the various botanical composition.

• Journal of The Korean Society of Grassland and Forage Science
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• v.18 no.4
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• pp.323-328
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• 1998

A field experiment was carried out to determine the effects of chemical and mechanical treatment at mowing on the field drying rate and hay quality of autumn oat (Avena sativa L.). The chemical drying agent/mower conditioner ($K_2CO_3$ 2%, conditioning, $K_2CO_3$ 2% + conditioning and control) were treated at different harvest stages (late boot, heading and bloom stage) for hastening hay manufacture in the autumn of 1996. After field dry, square bales were made by hay baler, and the dry matter(DM) loss and visual estimation of oat hay were evaluated after storing two months. In general, the field drying rate of oat was slow, regardless of harvest stage. Mechanical and chemical + mechanical treatment were effective, but the effectiveness of chemical alone was very low. With mower conditioning, the duration of field dry was shortened by 2 days compared with control. The DM loss of hay was higher at boot stage(51.4%) than at heading stage (21.1%), and the DM loss was reduced by mechanical and chemical + mechanical combined treatment. The visual score (leafiness, green color, odor and softness) of hay after storing was high in mechanical and chemical + mechanical, but the score by chemical alone was very low. The nutritive value (ADF, NDF, digestibility, and relative feed value) of hay was also high with treatment of mechanical and chemical + mechanical, but the quality by chemical alone was similar compared with control. In conclusion, mower conditioning can enhance the field drying rate of autumn oat, but the drying efficiency of the chemical drying agent was very low. However, it is suggested that hay-making of oat in autumn is very hard though using mower conditioner.

• Journal of The Korean Society of Grassland and Forage Science
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• v.28 no.3
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• pp.229-236
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• 2008

This experiment was conducted to study on the evaluation of fermentation ability of microbes for whole crop rice silage Inoculant at National Institute of Animal Science, RDA from 2004 to 2005. We collected 28 strains of microbes from whole crop rice silage. According to acidity and growth ability, 5 strains of microbes was isolated (R4-1, R7-1, R7-2, R10-1, R12-1). The cultures of 4 strains were identified to be Lactobacillus plantarum (R4-1, R7-1, R7-2 and R10-1) and one was identified to be Lactobacillus pentosus (R12-1). Whole crop rice was harvested at the yellow ripen stage. It was ensiled in experimental silos (20ℓ capacity) with or without microbial additives (R4-1, R7-1, R7-2, R10-1, R12-1 and three commercial inoculant) and stored at room temperature for 60d. The pH value and acetic acid content of additivetreated silages were lower and lactic acid content was higher than those of the control (p<0.05). There was a trend for acetic acid content to be lowest and lactic acid to be highest in R7-1 treated silage. Crude protein (CP) contents of R7-2 treated silage was higher and acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents of R7-1 treated silage was lower (p<0.05). Although some strains of inoculant could improve silage quality, L. plantarum R7-1 was more effective as an inoculant for whole crop rice silage. This microbe was named NLRI 401 and registered in the Korea Agricultural Culture Collection.

• Journal of The Korean Society of Grassland and Forage Science
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• v.28 no.1
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• pp.7-12
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• 2008

This experiment was carried out to examine the winter hardiness, heading date, quality, and yields of Festulolium hybrids, Festuca pratensis and Lolium multiflorum, which were cultivated during September 2005 to July 2006 at Suwon and Namwon. The results are as follows; Perun, Boxer, and Fleurial showed stronger or same level of hardiness than Hwasan 101, which is one of the strongest hybrids in winter hardiness. Therefore, we did not detect any problem in winter hardiness when these hybrids were cultivated in Korea. These are turned out to be mid and late maturing hybrids. The average heading date of three hybrids were 24 to 27 May in Suwon and Namwon. These date are same or 3 days later than Hwasan 101. The average fresh yields of 3 hybrids were increased by $17{\sim}29%$ than that of Hwasan 101. And the dry matter yields of Perun, Boxer, and Fleurial were increased by 39%, 26%, and 29%, respectively, than that of Hwasan 101. We could not detect any difference in the average fresh and dry matter yields between region, however there were significant differences in hybrids(p<0.05). Crude protein contents of 3 hybrids were higher to $14.3{\sim}16.6%$ than that of Hwasan 101. The neutral detergent fiber and acid detergent fiber were decreased by 3.9 and 7.0%, respectively, comparing to Hwasan 101. Therefore these hybrids have turned out to be excellent feed quality hybrids.

• Journal of Animal Environmental Science
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• v.18 no.3
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• pp.257-266
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• 2012

Near infrared reflectance spectroscopy (NIRS) has become increasingly used as a rapid, accurate method of evaluating some chemical constituents in cereal and dired animal forages. Analysis of forage quality by NIRS usually involves dry grinding samples. Costs might be reduced if samples could be analyzed without drying or grinding. The objective of this study was to investigate effect of sample preparations on prediction ability of chemical composition and fermentation parameter for Italian ryegrass silages by NIRS. A population of 147 Italian ryegrass silages representing a wide range in chemical parameters were used in this investigation. Samples were scanned at 1nm intervals over the wavelength range 680-2500 nm and the optical data recorded as log 1/Reflectance (log 1/R) and scanned in oven-dried grinding and fresh ungrinding condition. The spectral data were regressed against a range of chemical parameters using partial least squares (PLS) multivariate analysis in conjunction with four spectral math treatments to reduced the effect of extraneous noise. The optimum calibrations were selected on the basis of minimizing the standard error of cross validation (SECV) and maximizing the correlation coefficient of cross validation (${R^2}_{CV}$). The results of this study show that NIRS predicted the chemical parameters with high degree of accuracy in oven-dried grinding treatment except for moisture contents. Prediction accuracy of the moisture contents was better for fresh ungrinding treatment (SECV 1.37%, $R^2$ 0.96) than for oven-dried grinding treatments (SECV 4.31%, $R^2$ 0.68). Although the statistical indexes for accuracy of the prediction were the lower in fresh ungrinding treatment, fresh treatment may be acceptable when processing is costly or when some changes in component due to the processing are expected. Results of this experiment showed the possibility of NIRS method to predict the chemical composition and fermentation parameter of Italian ryegrass silages as routine analysis method in feeding value evaluation and for farmer advice.

• Journal of The Korean Society of Grassland and Forage Science
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• v.31 no.1
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• pp.75-84
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• 2011

This study was conducted to investigate the effect of harvest stage of corn on the quality of square baled corn silage manufactured with corn grown in paddy land of Department of Animal Resources Development, National Institute of Animal Science, RDA from 2009 to 2010. Corn "Kwangpyungok" was harvested at three different growth stages (milk, yellow ripen and ripen stage) and ensiled at each harvest time. Square baled corn silage was manufactured by use of square silage wrapping compressor. Each treatment was replicated three times. The content of crude protein (CP) of corn in square baled corn silage decreased with delayed maturity, but the content of ADF (acid detergent fiber), NDF (neutral detergent fiber), TDN (total digestible nutrient) and in vitro dry matter digestibility (IVDMD) were not changed. The content of moisture, pH and the nutritive values at three different harvest stages were not influenced by the method of silage manufacture and inoculant. The content of lactate of square baled corn silage harvested in milk stage of corn was significantly increased, as compared with that of round baled corn silage (P<0.05), but in stage of yellow ripen was significantly decreased (P<0.05). The content of acetate in square baled corn silage significantly decreased with delayed harvest maturity, as compared with that of round baled corn silage (P<0.05). Flieg's score of square baled corn silage harvested in milk stage of corn was slightly higher than that of round baled corn silage, but Flieg's scores in yellow ripen stage and ripen stage were not influenced by the method of silage manufacture. Flieg's score with delayed maturity was not influenced by the method of silage manufacture and inoculant. The manufacture of square baled corn silage was proved to be suitable for the fermentation of corn silage. Therefore, this study suggest that square baled corn silage can be a way of new silage manufacture technique.

• Journal of The Korean Society of Grassland and Forage Science
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• v.25 no.1
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• pp.43-50
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• 2005

The purpose of this study is to discuss the ways to consistently feed high quality corn silage(CS). This study evaluated the effect of the corn silage, after a certain time has elapsed, on the chemical composition and fermentation characteristics after feedout during the winter feeding period of the CS. Six samples of CS from four dairy farms(E1, E2, E3, and L1 ) were taken in order to feed the milking cows over a winter feeding Period from November of 2002 until February of the following year, 2003(six samples were taken at the fellowing dates in the following order: sample one was taken on the 23rd Nov. 2002, sample two on the 5th of Dec. 2002, 3rd sample on the 23rd of Dec. 2002, 4th sample on the 7th of Jan. 2003, 5th sample on the 22nd of Jan. 2003, and the 6th sampling was carried out on the 6th of Feb. 2003) at the three sampling sites after the opening of the trench silos at intervals of 15 days. In the dry matter contents of CS, there wasn't any specific tendency according to the elapsed time in the range of 21.3~$27.3\%$ at all low dairy farm(E1, E2, E3, and L1). And the average dry matter contents were 24.1, 25.9, 23.6, and $20.4\%$. Considering the Proper amount of the dry matter of CS during the ripen yellow stage, the appropriate moisture content was $33\%$ (NRC, 1989), and these dry matter contents were all low. A consistent tendency was not found in the contents of CS. The average of CP contents were 10.2, 8.0, 8.5, and $9.8\%$ at the E1, E2, E3, and L1 farms, and there were significant differences. The TDN contents of CS were not different among forms according to the time elapsed. The pH, according to the time elapsed after opening of the CS, there were no differences at each of E1, E2, E3, md L1 farms. Average pH were 3.5, 3.9, 3.6, and 4.1, md all of them were in normal range. In the lactic acid contents of CS, a consistent tendency was not found among four farms. But according to the time elapsed. there was a goat difference from 1.13~$7.8\%$ The acetate, propionate, and butyrate contents of CS were very low. In this study, there was no significant difference in the CS's chemical composition and fermentation characteristics according to the elapsed time at all four dairy farms. Considering the proper dry matter contents of CS during the ripen yellow stage, the appropriate dry matter content was $33\%$, and dry matter contents of few farms were all low. To enhance the quality of corn silage should be ensiled com at proper dry matter content range from 28 to $35\%$ Therefore, content of the corn plant should be always be closely monitored prior to beginning harvest.

• Journal of The Korean Society of Grassland and Forage Science
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• v.29 no.1
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• pp.73-82
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• 2009

The experiment was carried out from January through December in 2008 at Chungnam National University and the Unbong Animal Genetic Resources Station, NIAS. The experimental animals were twelve dairy goats (female, $30{\pm}1.8kg$), twelve Korean native Boats(female, $24{\pm}2.4kg$) and five sika deer(female, $92{\pm}5.2kg$). A total of 11 different types of hay and straw were tested in this study: such straw imported from USA in 2006 as annual ryegrass, perennial ryegrass, tall fescue and Kentucky bluegrass, and such hay imported from USA in 2007 as alfatfa, bermudagrass, timothy, kleingrass, oat and orchardgrass, and such domestic hay as mixed hay There were significant differences in chemical composition and in vitro dry matter digestibility (IVDMD) among the various types of imported hay and straw (p<0.05). Besides alfalfa hay and orchardpass hay all of the imported hay contained lower crude protein (CP) and IVDMD but contained higher neutral detergent fiber(NDF) and acid detergent fiber (ADF) than the domestic hay. According to the kinds of the imported hay, relative feed value (RFV) made the difference and the hay grades were ranged from 4 to 5, based on the RFV. According to the kinds of the imported hay, there were markedly differences in dry matte. (DM) intake and palatability ranking among dairy goats, Korean native goats, and sika deer. DM intake and palatability ranking were high in common between orchardgrass hay and bermudagrass hay, but Kentucky bluegrass straw, tall fescue straw, perennial ryegrass straw and annual ryegrass straw were proved to be very low in DM intake and palatability ranking. In conclusion, the quality and palatability among the imported hay that was tested in the study were quite variable and lower than expected. It is required to establish a better feed evaluation system for the imported hay.

• Journal of The Korean Society of Grassland and Forage Science
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• v.37 no.4
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• pp.264-270
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• 2017

This study was carried out to investigate the optimal harvesting time, feed value and fermentation quality of barley and wheat for the making of chopped whole crop silage substitute for formula feed. As a result, the moisture content of barley and wheat decreased with a late harvest, and barley progressed faster than wheat. The plant height was similar with harvesting time, and the number of spikes decreased with prolonged period after heading. The dry matter yield and TDN yield of barley harvested at 35 and 40 days after heading were significantly higher than those at 30 days after heading and wheat was significantly higher at 40 and 45 days than at 35 day after heading(p<0.05). Crude protein content of barley and wheat were increased with later harvesting time, and crude fiber, crude fat and crude ash were slightly decreased, but not statistically significant. NDF and ADF content of barley decreased with later harvesting time, and those showed similar level in wheat. TDN content of barely was slightly increased but there was no difference in wheat. Comparing the effects of fermentation on feed value of chopped whole crop silage, the approximate compositions were slightly increased after fermentation, but the difference was not significant. Fermentations resulted in increasing the pH value of barley silage with late harvesting time, but decreasing the lactic acid content(p<0.05). A pH value of wheat silage showed similar level in different harvest time, and lactic acid content was decreased. Considering the quantity and quality of fermentation, barley and wheat can be used for making chopped silage of whole crop silage when they were harvested at 35 days and 40~45 days after heading, respectively.