Son, Beom Young;Baek, Seong Bum;Kim, Jung Tae;Lee, Jin Seok;Ku, Ja Hwan;Kim, Sun Lim;Jung, Gun Ho;Kwon, Young Up;Ji, Hee Jung;Huh, Chang Suk;Park, Jong Yeol
Journal of The Korean Society of Grassland and Forage Science
/
v.33
no.2
/
pp.94-99
/
2013
Yanganok, a new single cross variety, was developed by the maize breeding team at the National Institute of Crop Science (NICS), RDA in 2012. This hybrid, which has a high yield of grain was produced by crossing two inbred lines, KS164 and KS163. KS164 is the seed parent and KS163 is the pollen parent of Yanganok. It is a yellow-orange intermediate maize hybrid (Zea mays L.). After a preliminary yield trial and advanced yield trial of Yanganok (Suwon180) in Suwon for 2 years, a regional yield trial was carried out for its growth characteristics, and yields were determined at 4 different locations from 2009 to 2012, with the exception of 2010. It was named 'Yanganok'. The silking date of Yanganok is 2 days earlier than that of the check hybrid, Kwangpyeongok. Plant height of Yanganok is similar to Kwangpyeongok, but its ear height ratio is higher than that of Kwangpyeongok. It has resistance to lodging. Stay-green features of Yanganok are similar to those of Kwangpyeongok. The ear ratio of Yanganok is similar to Kwangpyeongok. It has moderate resistance to southern leaf blight (Bipolaris maydis) and strong resistance to northern leaf blight (Exserohilum turcicum). It has moderate resistance to black streaked dwarf virus (BSDV), ear lot and corn borer. The dry matter yield of Yanganok, 17.45 ton/ha, was similar to that of Kwangpyeongok. The total digestible nutrients (TDN) yield of Yanganok, 11.96 ton/ha, was similar to that of Kwangpyeongok. The grain yield of Yanganok, 8.32 ton/ha was similar to that of Jangdaok. Seed production of Yanganok went well due to a good match during crossing between the seed parent, KS164, and the pollen parent, KS163, in Yeongwol, and F1 seed yield was 1.79 ton/ha. Yanganok would be a suitable cultivar to all plain areas in the Korean peninsula.
Journal of The Korean Society of Grassland and Forage Science
/
v.14
no.1
/
pp.34-41
/
1994
This experiment was carried out to select the $Sorghum{\times}Sudangrass$ hybrid of high productivity suited for soiling, and growth characteristics and productivity of 9 cultivars of introduced $Sorghum{\times}Sudangrass$ hybrids have been evaluated at the experimental forage field, College of Natural Science of Kon-Kuk university in Chungju over three years. The results obtained are summarized as follows : 1. NC855, Sordan79 and T. E haygrazer were taller than the other varieties as range from 209cm to 213cm. while Supergrazer was the shortest type as 173cm. Among the nine varieties used, NC855 and Pioneer 988 were classified as early maturing varieties, but G83F, FP5 and Supergrazer were classified as lately maturing varieties. 2. The stem diameter of Supergnzer and Sordan79 were thicker than the other varieties, while NC855, Garst757 and FP5 were thin. 3. The tillers of $Sorghum{\times}Sudangrass$ hybrids were ranged from 3.1 to 4.0 and NC855 and FP5 had 4.0 tillers per plant. The dead stubble of Sordan79 was the lowest as 4.0 percentage, while Supergrazer was the highest as 9.8 percentage(P<0.05). 4. GW9110G and T. E haygrazer were susceptible to lodging(P
Journal of The Korean Society of Grassland and Forage Science
/
v.29
no.2
/
pp.111-120
/
2009
There are barley, wheat, oat, rye and triticale winter cereal crops for whole crop silage. These small grains have been suitable to use for round-baled silage making as livestock feed. Studies were carried out to understand the growth and productivity of five winter cereals grown at paddy field in middle region of South Korea. The ratio of culm weight per plant were described by quadratic function for 5 winter cereals crops. The peak of culm ratio were 1 May in barley variety 'Youngyang', 5 May in wheat variety Keumkang', 10 May in rye 'Gogu'(Rye), 11 May in triticale variety 'Shinyoung' and 13 June in oat variety 'Samhan', respectively. The ratio of leaf per plant were linearly decreased by growing. In barley and oat, the ratio of spike weight per plant were linearly increased after heading, but in wheat and triticale, it were not accumulated at one time after heading and rapidly increased after fertilization. The ratio of spike weight per plant in barley was outstandingly higher than that of wheat, triticale, rye and oat, respectively. So, barley variety 'Youngyang' recommended for whole crop forage use was suitable for forage use because of high at ratio of the leaf and spike. The proper cutting date by the percentage of dry matter for baled-silage making, 30$[\sim}$40%, were 25 May in barley variety 'Youngyang', 25 May to 5 June in wheat variety 'Keumkang' and triticale variety 'Shinyoung', 15 May in rye 'Gogu' and 5 June in oat variety 'Samhan', respectively. The total aerial fresh weight accumulation at different cutting dates were described by quadratic function for barley, wheat and triticale. The forage fresh yield were peaked at 7 May in barley, 14 May in wheat, 17 May in triticale and late of May in oat, respectively. The dry matter yields of four small cereals were linearly increased after over-wintering. The yield at the date of proper harvesting time by water content for baled silage making were sequently high oat, barley, wheat, triticale and rye. The relative growth rate was relatively high in rye at early cutting but high in oat at late cutting. In barley, wheat and triticale, the rate were similar.
In a field trial, the influence was studied by measurement of growth and leaf yields and chemical composition (in organic cations and anions and total nitrogen) with two nitrogen dressings (lower nitrogen treatment 25kg and higher nitrogen treatment 75kg urea/10a as the summer fertilizer) after the summer cutting. The results were as follows; 1. With increasingn nitrogen dressing, branch length and weight were enchanced. The fresh weight of leaves was higher to be 273.6kg/10a in the higher nitrogen treatment than in the lower nitrogen treatment on 20 September. 2. The moisture content of leaves lasted above 73% until on 30 August. Afterward it decreased sharply upto 63% on 20 September. In higher nitrogen treatment it was higher about 0.1∼1.8% than in lower nitrogen treatment. The increasing nitrogen dressings combined with leaf condition led to be soft until on 10 October. 3. Dry matter weight of leaves started decreasing around on 10 September, whereas that of branches increased until around 30 September indicating that the dry matter moved to branch and root from leaves. 4. The increase in Ca$\^$2+/ content was particularly evident, whereas the K$\^$+/ and Mg$\^$2+/ decreased with growth. The Ca$\^$2+/ content was much higher in the high nitrogen treatment than in the low nitrogen treatment. 5. With rapid decrease in total nitrogen and water in the leaves around the end of August, the Ca$\^$2+/ and Cl$\^$-/ which were higher in the lower part moved up to the upper part. Whereas the K$\^$+/, H$_2$PO$_4$$\^$-/ and SO$_4$$\^$2-/ which were higher in the upper part moved down to the lower part. 6. Total nitrogen content decreased sharply 3,200me/kg DM to 2,000me/kg DM at the end of August changing the maxmium content of total nitrogen from upper to lower part in the low nitrogen treatment on 12 September and in the high nitrogen treatment on 22 September, and an apex of branches was died and fallen 10 days after respectively. 7. The sum of cation in leaves (∑C) increased from 1400me/kg DM to 1600me/kg DM with growth, wherease that of anions (∑A) was approximatly the same during the whole growing season. As the result, the ionic balance (C-A) increased from 1000me/kg DM to 1200me/kg DM. 8. ∑C, ∑A and (C-A) were higher in the high nitrogen treatment than in the low nitrogen treatment due to be much higher of Ca$\^$2+/ content and higher of NO$\^$-/$_3$, SO$\^$2-/$_4$ and H$_2$PO$_4$$\^$-/ content.
Kim, Jong Geun;Li, Yu Wei;Kim, Meing Joong;Kim, Hak Jin;Jeong, Suk Im;Jung, Jeong Sung;Park, Hyung Soo
Journal of The Korean Society of Grassland and Forage Science
/
v.36
no.2
/
pp.135-141
/
2016
This study amied to determine the effect of species and seed mixture on productivity, botanical composition and forage quality in middle mountainous region (Geosan) pasture. Total seven experimental pastures (T1 : Orchardgrass, T2 : Timothy, T3 : Tall fescue, T4 : Perennial ryegrass, T5 : Kentucky bluegrass, T6 : Timothy + Orchardgrass + Tall fescue + Alfalfa, T7 : Timothy + Orchardgrass + Kentucky bluegrass + White clover) were established in autumn, 2014 and evaluated for productivity and agronomic characteristics for 2015. Plant heigh was high in Orchardgrass and Perennial ryegrass pasture. Dry matter (DM) content was high in Kentucky bluegrass. Botanical composition in $1^{st}$ harvest was high in shrub, but the grass composition was high in $2^{nd}$ and $3^{rd}$ harvest. Fresh and DM yield were higher in Orchardgrass and Perennial ryegrass (p<0.05); whreras, Kentucky bluegrass was the lowest. In seed mixture pasture, yields of T6 plot (Tall fescue) were higher than those of T7 (Kentucky bluegrass). Average CP (crude protein) content of $2^{nd}$ and $3^{rd}$ cutting time was 16.91 and 14.79%, respectively and Kentucky blue grass was the highest in $3^{rd}$ cutting time by 17.57%. IVDMD (in vitro dry matter digestibility) showed low in $1^{st}$ cutting and Kentucky bluegrass was the lowest in every cutting time. TDN (total digestible nutrient) content was the highest in $3^{rd}$ cutting and the lowest in $1^{st}$ cutting. These results indicated that Orchardgrass, Perennial ryegrass and T6 are recommendable for productivity and Timothy, Perennial ryegrass and T7 are recommendable for forage quality.
Chung, Sang Uk;Sung, Si Heung;Zhang, Qi-Man;Jung, Jeong Sung;Oh, Mirae;Yun, Yeong Sik;Seong, Hye Jin;Moon, Sang Ho
Journal of The Korean Society of Grassland and Forage Science
/
v.39
no.2
/
pp.105-113
/
2019
A two-year study was conducted from 2017 to 2018 by the establishment of a test field at Chungju-si and Cheongyang-gun. Plant height, number of leaves, insects and diseases, and fresh and dry matter yields for corn hybrid('Kwangpyeongok') were investigated. Daily average, maximum, and minimum temperature, monthly average temperature, daily precipitation, and sunshine duration during the growing season were investigated. We selected climate-critical factors to corn productivity and conducted an evaluation of vulnerability to climate change from 1999 to 2018 for both regions. In 2018, the dry matter yield of forage corn was 6,475 and 7,511 kg/ha in Chungju and Cheongyang, respectively, which was half of that in 2017. The high temperature and drought phenomenon in the 2018 summer caused the corn yield to be low. As well as temperature, precipitation is an important climatic factor in corn production. As a result of climate impact vulnerability assessment, the vulnerability has increased recently compared to the past. It is anticipated that if the high temperature phenomenon and drought caused by climate change continues, a damage in corn production will occur.
Park, Nam-Geon;Ko, Seo-Bong;Lee, Chong-Eon;Lin, Shin-Heum;Hwang, Kyung-Jun
Journal of The Korean Society of Grassland and Forage Science
/
v.23
no.1
/
pp.49-58
/
2003
This study was conducted to determine the effect of seeding times and mixture rates of oat and forage rape on the growth characteristics and forage yields during rest periods from March to June after the harvest of potatoes in potato cultivation fields located in the areas about 600m above the sea level in Jeju. The experiment was a split plot desist with seeding times(early, middle and late March) sown . at intervals of ten days from early March to late March as the nam plots and mixture rates as subplots, consisted of oat single(150kg/ha), forage rape single(15kg/ha), oat/rape mixtures 75 : 25% (112.5kg/ha of oat and 3.75kg/ha of rape), oat/rape mixtures 50 : 50%(75kg/ha of oat and 7.5kg/ha of rape) and oat/rape mixtures 25 : 75%(37.5kg/ha of oat and 11.3kg/ha of rape). The germination and establishment of eat and rape were not significantly different among seeding times and mixture rates. The plant heights were higher when seeded middle March compared to seeding times of early and late March. The growth stage of the oats seeded early March was dough stage, while that of oats seeded middle or late March was milk stage. The dry matter yields per ha were higher(p<0.05) when seeded middle March than those of seeding time of early and late March. The crude protein contents of rape single, mixtures and oat single treatments were 15.9, 12.4∼14.5 and 8.5%, respectively.
This study was conducted to estimate organic Hanwoo carrying capacity when whole crop wheat and triticale as winter forage crops were grown on different applying sources (no fertilizer, organic fertilizer or cattle slurry), and mixed sowing in combination with hairy vetch and forage pea at the level of 50% cattle slurry application during the period of 2009~2011. The experimental plots were consisted of 5 treatments. Each treatment was triplicates and allocated in the randomized complete block design. For whole crop wheat, annual mean dry matter (DM) yield was significantly (P<0.05) higher for fertilizer application treatments than for no fertilizer treatment, and crude protein (CP) yield was significantly (P<0.05) higher for forage pea and hairy vetch-mixed sowing treatments than for no fertilizer and organic ferilizer treatments. Mean CP, total digestible nutrients (TDN) and relative feed value (RFV) contents of legumes-mixed sowing treatments was significantly (P<0.05) higher than those of other treatments. As diets replaced with 70% whole crop wheat were provided for 450kg of Hanwoo heifers, legumes-mixed sowing treatments could raise more heifers than organic fertilizer and no fertilizer treatments. For triticale, annual mean DM, CP and TDN yields were significantly (P<0.05) higher for fertilizer application treatments than for no fertilizer treatment, and CP content of legumes-mixed sowing and cattle slurry application treatments was significantly (P<0.05) higher than that of other treatments. When 450kg of Hanwoo heifers were fed on diets replaced with 70% triticale, it was estimated that legumes-mixed sowing treatments at the level of 50% cattle slurry application could rear average 3.3~3.4 heads/ha/year, which was significantly (P<0.05) higher than no fertilizer treatment (2.5 heads/ha/year). It was indicated that DM yields of whole crop wheat and triticale were much more effective in cattle slurry application than organic fertilizer, and Legumes-mixed sowing at the level of 50% cattle slurry application rather than whole crop wheat or triticale alone increased yields per unit area and nutritional value such as CP content. In conclusion, it is conceived that whole crop wheat or triticale produced in the manner above can be used instead of grains imported as dietary protein sources in the organic Hanwoo feeding regimen.
The optimum time for nutritional diagnosis of the field-grown rice plant by total plant analysis, and the relationship between maximum or minimum nutrient content at various growth stages and corresponding yield and between maximum or minimum yield and corresponding nutrient content were as follows. 1. The percentage occurence of the minimum nutrient content in straw or grain of minus nutrient plot was in the order of 20 days after transplanting (20)>maximum tillering (MT)>harvested straw (HS)> earformation (EF)>straw at flowering (FS)>harvested grain (HG)>ear at flowering (FE) for nitrogen, MT>EF>HS>20=FS>FE>HG for phosphorus and MT>EF>20>FS>HG>FE for potassium. 2. The time when the occurece of minimum nutrient content in minus plot is highest was considered as the optimum time for nutritional diagnosis of root zone. It was 20 days after transplanting in N and maximum tillering stage in P and K. 3. The highest relative difference($100{\times}(L-H)/H$), between maximum (H)and minimum(L) nutrient content appeared in harvested straw for N and P while in harvested grain for K and Si, suggesting the close relation to their translocation from straw to grain. 4. The corresponding yield of maximum nutrient content was higher than that of minimum content at all growth stages in N, at all stages except MT and EF in P, at 20 days after trans planting and harvest in K, but it was always lower in Si, thus the contribution of nutrient content to yield will be in the order of N>P>K>Si. 5. The highest relative difference ($100{\times}(L-H)/H$, where H and L stand for yields) between yields corresponding to maximum and minimum nutrient content appeared at 20 days after transplanting for N. P. K, indicating the time of the closest relation between yield and nutrient content. 6. The highest difference (H-L, where H and L stand for nutrient content) between N. P. K contents corresponding to maximum or minimum yields came at 20 days after transplanting. The contents of N. P. K corresponding to the maximum total dry matter yield were lower than those corresponding the maximum grain yield at this stage. These facts support the closest relation between yield and nutrient content at this time. 7. The highest yield among yields corresponding to maximum nutrient contents occured at 20 days after transplanting in N. P. K but the lowest yield among yields corresponding to minimum nutrient contents appeared at the same stage only in nitrogen. 8. From the above facts the optimum time for diagnosis of nutrient around root zone seems different from that for diagnosis of nutritional status in relation to grain yield.
This experiment was conducted to evaluate the effect of tillage system and fertilizer type on the forage yield, quality, and production cost of winter rye. This experiment was a 2×2 factorial arrangement for two tillage system (Tillage and No-tillage) and two fertilizer type (Chemical and Manure compost). There was no difference in dry matter (DM) content, TDN (total digestible nutrients) yield, and CP (crude protein) yield of rye, but the DM yield was significantly higher for rye in tillage compared to the no-tillage system. The use of chemical fertilizer type also showed significant increase in DM, TDN and CP yields compared to the use of manure compost as fertilizer. The CP content for rye was significantly higher in no-tillage compared to tillage system, but the type of fertilizer used has no significant effect. No significant effects were observed for NDF (neutral detergent fiber), ADF (acid detergent fiber), and TDN in tillage system and fertilizer type of rye. The total cost to prepare 1 ha is lower in no-tillage compared to tillage, but production cost in rye per kg of fresh, DM and TDN were almost the same as tillage system because of lower forage production. The total cost to prepare 1 ha with the use of chemical fertilizer was higher than using manure compost as fertilizer, however, the cost to produce 1 kg of fresh, DM and TDN were lower when using chemical as fertilizer because of higher yield. Based on the results of this study, tillage system and fertilizer type affected forage yield more than forage quality. Production cost per 1 kg of tillage was lower compared to no-tillage, and that of chemical was lower than manure because of higher forage yield.
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