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논문 기본 정보

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학술저널
저자정보
Jung, Jeong Sung (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Kim, Young-Jin (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Kim, Won Ho (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Lee, Sang-Hoon (Planning & Coordination Division, National Institute of Animal Science) Park, Hyung Soo (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Choi, Ki Choon (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Lee, Ki-Won (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Hwang, Tae-Young (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration) Choi, Gi-Jun (Gassland & Forage Division, National Institute of Animal Science, Rural Development Administration)
저널정보
한국초지조사료학회 한국초지조사료학회지 한국초지조사료학회지 제36권 제3호
발행연도
2016.1
수록면
215 - 222 (8page)

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Nitrogen (N) fertilizer management is one of the important aspects of economic production of sorghums in sustainable agriculture. The aim of the study was to evaluate the effects of different N application rates and its split N application methods on productivity, growth characteristics, N accumulation, N use efficiency (NUE), and feed value of Sorghum ${\times}$ Sudangrass hybrids. Treatments consisted of five N application rates (0, 150, 200, 250, and $300kg\;ha^{-1}$) and two split N application methods (40% in basal N, 30% at the growing stage, and 30% after the first harvest vs. 50% in basal N and 50% after the first harvest). Plant height, leaf width, and stem diameter were increased ($p{\leq}0.05$) with increasing N fertility rates at each harvest. Chlorophyll content (expressed as SPAD values) was the highest at a rate of $300\;kg\;N\;ha^{-1)$ (first harvest, 46.32; second harvest, 33.09). It was the lowest at zero N (first harvest, 21.56; second harvest, 18.5). Total N, N uptake, and NUE were increased with higher N rates. Split N application had little effect on total N, amount of N uptake, or NUE. Total dry matter yields were the highest ($21,715\;kg\;ha^{-1}$) at a rate of $300\;kg\;N\;ha^{-1}$. It was the lowest ($10,054\;kg\;ha^{-1}$) at zero N. Our results suggest that more than $300\;kg\;N\;ha^{-1}$ can improve dry matter yield to be above 116% compared to zero N, thus enhancing the agronomic characters of sorghums. However, no significant effect had been found for split N application. Further work is needed to determine the optimal N levels and the effect of split N application rates.
#Nitrogen #Sorghum ${times}$ sudangrass hybrids #Fertilizer #Split application

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참고문헌 (37)

참고문헌 신청
Afzal, M. / 2013 / Performance of multicut forage sorghum under various sowing methods and nitrogen application rates / The Journal of Animal & Plant Sciences 23:232~239 google schola Alcoz, M. M. / 1993 / Nitrogen fertilization timing effect on wheat production, nitrogen uptake efficiency, and residual soil nitrogen / Agronomy Journal 85:1198~1203 google schola Ali, H. G. / 2014 / Forage productivity of three introduced sorghum× sudan grass hybrids under irrigation in three arid areas in Oman / Jordan Journal of Agricultural Sciences 10:716~724 google schola Almodares, A. / 2006 / Effects of planting date and time of nitrogen application on yield and sugar content of sweet sorghum / Journal of Environmental Biology 27:601~605 google schola Ayub, M. / 2002 / Effect of different levels of nitrogen and harvesting times on the growth, yield and quality of sorghum fodder / Asian Journal of Plant Sciences 4:304~307 google schola

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