• Journal of The Korean Society of Grassland and Forage Science
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• v.20 no.2
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• pp.91-96
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• 2000

This research was concluded under dryland condition in Thrace region in 1994-1995 growing season. This experiment was arranged in randomised block design with three replications. Yield and some important yield components (plant height, number of pods per plant, number of seeds per pod and 1000 seed weight) were determined. According to the results, it can be concluded that the best sowing rate and row distance of chickling vetch for the region are $100\;seed/\textrm{m}^2$ and 20 cm, respectively.

• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.2
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• pp.177-182
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• 1999

This research was carried out in a farm situated in Malkara District of Tekirdag Province (Turkey) in 1994-95, and the effect of genotype and environmental conditions on some characters and variations of these characters in terms of silage yield in 8 dent corn varieties were determined. The results of this research showed that leaf weight, stem diameter, and silage yield had a low broad sense heritability while the number of leaves per plant had a high heritability. Yield performance of varieties varied to a significant degree because of variations in rainfall rate during the growing periods. Leaf number, silage yield, leaf weight, stem diameter, plant height and ear weight varied between 13.33-17.33 number, 8,443-11,114 ton/hec, 152.8-244.2 g, 2,615-2,965 cm, 216.5-252.5 g and 176.2-285.8 g, respectively.

• Journal of The Korean Society of Grassland and Forage Science
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• v.43 no.3
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• pp.183-189
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• 2023

It is widely known that forage corn is one of the most important crops in the production of silage and green chops during the summer months. In this study, the characteristics and the productivity of Kwangpyeongok, AGR 41, and Nero IT corn cultivars were evaluated in the regions of Jeju and Cheonan, Korea between 2021 and 2022. In each year, different corn cultivars were sown in different parts of the country on April 7 in Jeju and May 3 in Cheonan. The yield of three cultivars, Kwangpyeongok, AGR 41, and Nero IT were measured at the yellow-ripening stage, including the leaves and stems (Stover) and corn grain. Kwangpyeongok stover and total dry matter (DM) yields were slightly higher in Cheonan than in Jeju over the past two years. The quantity of corn cultivated in all cultivated areas was similar. The average yield of AGR 41, corn quantity and total DM were slightly higher in Jeju than in Cheonan. In terms of stover yield, and total dry matter content of the Nero IT cultivar cultivated in Jeju had a slightly higher yield than the cultivar cultivated in Cheonan. Based on this study, all cultivars can show some variations but not too much in terms of growth productivity and distinct characteristics depending on their location. Overall, AGR 41, and Nero IT cultivars in Jeju exhibit slightly higher levels of productivity than the same cultivars in Cheonan.

• Korean Journal of Organic Agriculture
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• v.22 no.1
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• pp.155-166
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• 2014

Organic forage production system is one of the most important aspects in organic livestock production. Animals in the organic farming system are also essential for manure to be used for organic forage production. Both organic forage and animals are essential to maintain the cycle of organic agriculture system. In this paper we introduce the organic forage production system in Korea. Summer and winter crops are getting popular in Korea because of their high forage yield and cultivation in double cropping systems. Common cropping system for forage production in Korea is the double cropping system with legume and grass mixture. Forage sorghum and sudangrass are the most popular ones of annual summer forage corps because of their high production with low cost in the double cropping systems. In the mixture of forage crops, inter cropping is more suitable in the corn and sorghum cropping system because of high lodging resistance and forage yield, and low weed population. Forage sorghum and sudangrass are difficult to preserve as direct-cut silage due to the fact that its high moisture content causes excessive fermentation during ensiling. Corn grain addition to sorghum silage could be recommended as the most effective treatment for increasing quality and reducing production cost. It is recommended that corn grain could be added up to 10% of total amount of silage. And agriculture by-products also can be added at the time of ensiling to minimize losses of effluent and have the additional advantage of increasing quality. Agriculture by-products as silage supplements increased DM content and quality, and decreased the production cost of sorghum silage. Field pre-wilting treatment of forage crops also increased DM content and quality of the silage. Wilting sorghum${\times}$sudangrass hybrid before ensiling was the effective method for reducing effluent and increasing pH and forage quality more than direct cut silage. Optimum prewilting period of sudangrass silage was 1 or 2 days. In organic forage, the most important factor is the enhancement of organic forage sufficiency in relation to the environmental-friendly and organic livestock. Consequently, there are many possibilities for animal production and organic forage production in Korea. No forages no cattle concept should be emphasized in organic farming system.

• Proceedings of the Korean Society of Crop Science Conference
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• 1994.06a
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• pp.124-125
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• 1994

• Journal of The Korean Society of Grassland and Forage Science
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• v.33 no.4
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• pp.319-326
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• 2013

In the present study, we investigated the effects of high forage diets on the volume of udder, hormone level in blood, and lactation characteristics in the Holstein dairy cow. We divided into two groups; high forage diet [HF, concentrate: forage=4:6 n=41] and low forage diet [LF, 6:4 n=21]. Five cows were selected from each group based on their age for measuring the udder volume and the serum levels of estradiol and progesterone. Lactation characteristics were compared between HF and LF. The udder volume was 2.5 fold larger in HF at early gestation (p<0.01), but no difference was noted afterward. For the hormone levels, no significant difference was found between the groups. In HF, milk yield was significantly increased and maintained high longer, while somatic cell count was approximately 50% lower. Meanwhile, the milk fat content was significantly lower in HF during early lactating phase (p<0.001), but there was no difference thereafter. For milk protein and solid content, and MUN, no differences were found between the groups during lactation. Our results indicated that feeding high forage diets to dairy cows can increase milk yield and quality without notable changes in the udder volume and hormone level.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.3
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• pp.340-346
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• 1985

Field experiments were carried out to investigate the effects of sowing dates, ferrilizer levels and clipping treatment of forage production and quality of barley and rye in paddy field. The field emergence rates in barley varieties was decreased rapidly at sowing after November. But in rye varieties, it was not decreased even in sowing until Nov. 3. Winter survival of barley and rye varieties were not affected by fertilizer levels. And winter survival decreased with delay in sowing dates in barley varieties, but, it was not influenced by sowing dates in rye varieties. The production of forage dry matter at heading stage was increased with fertilizer levels, and was decreased with delay in sowing dates. Content of crude protein and crude fat of dry forage at heading stage were increased with fertilizer levels. But, content of crude ash, crude fiber and TDN were not influenced by fertilizer levels. As increased fertilizer levels, NFE Content was decreased and TDN yield was increased with fertilizer levels. In comparisons of TDN yield between barley and rye varieties, TDN yield of rye were superior to those of barley. Clipping twice produced more forage yield than clipping once in both crops. However, optimum clipping interval was about 40 days between first and second clipping in rye but not determined in barley. The l2cm clipping height was the highest production in average total yield.

• Journal of The Korean Society of Grassland and Forage Science
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• v.23 no.4
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• pp.265-270
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• 2003

This study was conducted to determine the influence of seeding date on growth, characteristic yield and chemical composition of Italian millet (Setaria italica) from April 20 to May 30, 2003(April 20, May 1, May 20 and May 30) in Jeju. A local variety was seeded on days to heading were lessened as seeding date was delayed. The plant height was longest when seeded on 1 May(131cm) than at the other seeding dates. Stem diameter, number of leaves, leaf length and leaf width had the similar trend with plant height. SPDA reading values were greater at earlier seedings. Fresh forage yield was greatest (43.28MT/ha) at 1 May seeding and decreased gradually before or after this seeding date. Dry matter yield, crude protein yield and total digestible nutrient (TDN) yield had nearly the same tendency with fresh forage yield. Crude protein, crude fat, NFE and TDN contents were greatest at 30 May seeding and then decreased earlier seedings. Crude ash and crude fiber content tended to decreased as seeding was delayed. Based on the these findings, optimum seeding date for forage production of Italian millet seems to be early May in Jeju island.

• Journal of The Korean Society of Grassland and Forage Science
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• v.33 no.3
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• pp.185-192
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• 2013

This study was carried out to investigate the influence of the seeding dates on the yield and feed value in cultivating Italian rye grass on paddy soil. The field experiment was designed in a randomized block design of 3 repetitions with seeding dates of Oct. 19 (T1), Oct. 26 (T2), Nov. 2 (T3), Nov. 9 (T4), and Nov. 16 (T5) treatments. Plant length, fresh yield, dry matter yield and TDN yield were increased with early seeding dates (p<0.05). Crude protein, Crude fat and crude ash were increased with early seeding dates (p<0.05). On the other hand, NDF, ADF and Crude fiber were decreased with early seeding dates (p<0.05). Total mineral contents were higher in the order of T4 > T3 > T5 > T1 > T2 (p<0.05). The total composition amino acid content was decreased significantly (p<0.05) as the seeding dates delayed. Total free sugar content was highest in T1, whereas the lowest in T5 treatment (p<0.05). Nutrition yields (crude protein, crude fat, amino acid and free sugar) were increased significantly with early seeding dates (p<0.05). The above result indicated that it is favorable to seed soon after rice harvest to increase dry matter yield and nutrition yield of Italian ryegrass in the midlands.

• Journal of The Korean Society of Grassland and Forage Science
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• v.37 no.3
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• pp.208-215
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• 2017

This study was designed to investigate the carryover effects of high-forage to concentrate (F: C) diet in bred heifers on feed intake, feed efficiency (FE) and milk production of primiparous lactating Holstein cows. The experiment was conducted for 589 days (d) from onset of pregnancy through to the end of first lactation. Twenty-four bred heifers (Body weight: $BW=345.8{\pm}45.4kg$ and $15{\pm}1.2mon$ of age) randomly assigned to two groups of 3 pens containing 4 heifers each and fed high forage (HF) diet with F: C ratio of 91.7: 8.3% and low forage (LF) diet with F: C ratio of 77.8: 22.2% throughout the pregnancy period. After calving, lactating cows were fed total mixed ration (TMR) based diet. No differences (p > 0.05) were observed in dry matter intake (DMI) of bred heifers and primiparous lactating cows in both HF and LF groups. The FE of mid-to-late lactation period was higher (p< 0.05) in HF than LF group. However, the HF group showed higher (p < 0.05) milk yield, 4 % fat corrected milk (FCM) and energy corrected milk (ECM) than LF group during the 305 d lactation. The LF group showed higher (p < 0.05) milk fat, crude protein (CP), milk urea nitrogen (MUN), solid not fat (SNF) and somatic cell count (SCC) than HF group. It is concluded that restriction of F: C ratio to 91.7: 8.3% to bred heifers has the potential carryover effects to maintain higher milk yield and FE with no adverse effect on feed intake and milk composition of primiparous lactating Holstein cows.