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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of The Korean Society of Grassland and Forage Science
Journal Basic Information
Journal DOI :
The Korean Society of Grassland and Forage Science
Editor in Chief :
Volume & Issues
Volume 29, Issue 4 - Dec 2009
Volume 29, Issue 3 - Sep 2009
Volume 29, Issue 2 - Jun 2009
Volume 29, Issue 1 - Mar 2009
Selecting the target year
Sulfur Deficiency Effects on Sulfate Uptake and Assimilatory Enzymes Activity in Rape Plants
Li, Lu-Shen ; Jin, Yu-Lan ; Lee, Bok-Rye ; Kim, Tae-Hwan ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 95~102
DOI : 10.5333/KGFS.2009.29.2.095
uptake and its assimilation in response to the exogenous
supply level in forage rape (Brassica napus L.), the concentration of this element in plant tissues and the activity of ATP sulfurylasc and APS reductase was measured after 25 hours of treatment (1.0 mM
, control; 0.1 mM
, S deficiency; 0 mM
, S deprivation).
uptake and the concentration in the plant tissues significantly decreased in S-deficient and S-deprived condition, while it maintained at nearly same level in the control. The activity of ATP sulfurylase tended to increase with decreasing the exogenous
supply, while that of APS reductase to decrease. A significant change in both enzymes responding to S-deprivation treatment was observed only young and middle leaves. The results indicated that
assimilation in young leaf tissues would be much more sensitively responded to S-limited nutrition.
Sulfur Deficiency Effects on Nitrate Uptake and Assimilatory Enzyme Activities in Rape Plants
Li, Lu-Shen ; Jin, Yu-Lan ; Lee, Bok-Rye ; Kim, Tae-Hwan ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 103~110
DOI : 10.5333/KGFS.2009.29.2.103
Rape plants, especially forage type, are known as one of high S-demanding plants. Their productivity and quality have often limited under S-deficient condition. To investigate the effect of S-deficiency on N uptake and its assimilation,
absorption, nitrate reducatse (NR) and glutamine synthetase (GS) activity in leaf and root tissues as affected by different S-supplied level was determined.
uptake was not significant between control and S-deficient treated plants, while significantly depressed in S-deprived plants for the early 8 h. NR activity decreased as S-availability decreased, especially in young and middle leaves, representing more than 35% of decrease in S-deficient and 70% in S-deprived plants when compared with control. In roots, a significant decrease (-29%) in NR was observed only in S-deprived plants. Relatively higher GS activity was found in young leaves for three all treatments. As a whole leaf tissue, S-limited conditions resulted in a reduction of GS activity. In root which showed the lowest activity, a significant decrease (-30%) was observed only in S-deprived plants.
Changes of Growth and Forage Yield at Different Cutting Dates among Five Winter Cereals for Whole Crop Silage in Middle Region
Ju, Jung-II ; Choi, Hyun-Gu ; Gang, Young-Sik ; Lee, Joung-Jun ; Park, Ki-Hun ; Lee, Hee-Bong ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 111~120
DOI : 10.5333/KGFS.2009.29.2.111
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
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.
Effect of Harvest Time and Cultivars on Forage Yield and Quality of Whole Crop Barley
Yun, Seong-Kun ; Park, Tae-Il ; Seo, Jae-Hwan ; Kim, Kyeong-Hoon ; Song, Tai-Hua ; Park, Ki-Hun ; Han, Ouk-Kyu ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 121~128
DOI : 10.5333/KGFS.2009.29.2.121
A field study was conducted from 2007 to 2008 at Department Rice and Winter Cereal Crop, NICS, RDA, to evaluate the effects of harvest time and cultivar on forage yield and quality. Four whole crop barley cultivars (`Youngyang`, `Wooho`, `Yuyeon` and `Dami`) were selected and harvested on five separate growth stages (heading, and intervals of 1, 2, 3 and 4 weeks after heading) in split plot design with three replications. Results from this experiment indicated significant differences due to harvest time and cultivar in dry matter yield and total digestible nutrients (TDN) yield for forage. The interaction between harvest time and cultivar was not significant. The TDN yield trends were increasing with later harvest time due to higher dry matter yield and TDN content. This experiment provides some interesting results with respects to optimum harvest time, feed value and ultimately yield for the different whole crop barley cultivars.
Changes in Quantity and Quality of Winter Cereal Crops for Forage at Different Growing Stages
Song, Tai-Hua ; Han, Ouk-Kyu ; Yun, Seong-Kun ; Park, Tea-Il ; Seo, Jae-Hwan ; Kim, Kyeong-Hoon ; Park, Ki-Hun ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 129~136
DOI : 10.5333/KGFS.2009.29.2.129
This study was to optimize the harvest time of several winter cereal forage crops. Barley, rye, oat, triticale and wheat were evaluated for the quantity and quality of hay and silage at four different harvesting stages, including heading, 10 days after heading (DAH), 20 DAH and 30 DAH. Barley and wheat harvested at 20 DAH, and oat and triticale at 30 DAH showed maximum dry matter yield. Crude protein content of barley, wheat, triticale and oat decreased significantly with advancing crop maturity. Mean crude protein content was the highest in rye and the lowest in oat. The NDF and ADF content of barley, wheat, triticale and oat decreased with late harvest, while rye increased. Maximum total digestible nutrients (TDN) content was recorded in barley and wheat harvested at 20 DAH, in triticale and oat at 30 DAH, and in rye at heading. The maximum TDN content of silage, 66.98%, was recorded in barley, followed by wheat, triticale, oat and rye. However, The crude protein, NDF and ADF of silage was 1 to 4 times higher than those of hay. In this study, barley harvested at 20-25 DAH, wheat and triticale at 30 DAH, and rye at heading provided a good compromise between dry matter yield and forage quality. At this stage, a sufficient quantity of fodder with moderate forage quality was obtained.
Studies on Cropping System for Year-Round Cultivation of Forage Crops in Gyeongnam Province
Kang, Dal-Soon ; Kim, Dae-Ho ; Shin, Hyun-Yul ; Son, Gil-Man ; Rho, Chi-Woong ; Kim, Jung-Gon ;
Journal of The Korean Society of Grassland and Forage Science, volume 29, issue 2, 2009, Pages 137~152
DOI : 10.5333/KGFS.2009.29.2.137
Present experiment was conducted at the field of Gyeongnam Agricultural Research and Extension Services in Jinju city for two continuous cropping seasons to develop several adaptable and valuable year-round forage-producing system for elevating self-sufficiency and dollar-saving by reduced importing of crude forage. Twenty cropping systems were tested in experiment using whole crop barley (WCB), oat, rye, Italian ryegrass (IRG), and triticale in winter season and com, sorghum, sorghum
sudangrass hybrid, and oat in summer time. Sorghum
sudangrass hybrid showed highest fresh forage yield among experimented summer season crops, and followed com. Com produced the most dry matter yield, and followed sorghum
sudangrass hybrid, sorghum and oat in order. There was no significant effect of former winter crops on fresh and dry matter production succeeding summer time crops. Among winter season forage crops tested, oat showed the highest fresh and dry matter when clipped on mid-May, and followed triticale, IRG, rye and WCB. Winter-time cultivated crops showed no clear effect on the growth and forage (fresh and dry matter) producing ability of following summer crops. There was the most protein content in oat plant among summer season planted crops, and in sorghum for acid detergent fiber (ADF) and in sorghum
sudangrass hybrid for neutral detergent fiber (NDF), respectively. While, com showed highest value of relative feed value (RFV) and total digestive nutrients (TDN) among those crops. Among winter crops, the highest crude protein was in oat plant showing no significant differences of ADF and NDF, while, relatively higher value of RFV was recognized with rye and triticale. Also, triticale contained more TDN as compare to other forage crops. The cropping combinations such as com followed by (fb) rye and maize fb triticale were regarded as promising systems having higher dry matter producing ability among tested combinations. Considering TDN producing potential, the combinations with sorghum
sudangrass hybrid fb triticale andlor rye were would be suitable ones, coincidently. There was a tendency which elevating pH, electric conductivity (EC) and organic matter (OM) contents in soil after experiment comparing to before planting. More crude protein content in plant was shown at mid-May clipping as compared to the forage at April cut in all winter season grown crops. ADF and NDF contents were increased by delayed clipping showing decreased tendency of RFV and TDN in plant. In conclusion, many cropping systems would be available using above mentioned forage crops according to farmer`s conditions and scale, etc.