栽植密度에 따른 油菜의 生育, 靑刈收量 및 粗成分 變化 = Effect of planting Density on Growth, Forage Yield and Chemical Composition of Rape

다국어 초록 (Multilingual Abstract)

ABSTRACT
Four cultivars of rape were grown at 5 planting densities in Cheju volcanic soil
to investigate the effects of planting density on major agronomic characters of
forage rape. Hallayuchae flowered earliest (180 days) while Sparta latest(191 days).
Days to flowering was reduced as planting density was decreased. The average
plant height of Sparta was 162.2cm and that of Ramon and Youngsanyuchae was
158.4 and 138.6cm, respectively. In 10 X 10cm planting density plot, plant height was
152.5cm and it was gradually decreased as planting density was decreased. The
number of branches, stem diameter, leaf length and leaf width of Ramon was
greatest, while those of Hallayuchae were least. These variables were increased as
planting density was decreased. Fresh forage yield (5,719kg/10a) and dry matter
yield (1,229kg/10a) for lOxlOcm planting density plot, were greatest, but those were
gradually decreased as planting density was decreased and those for 30 X 30cm
planting density plot were 4,232kg/10a and 906kg/10a respectively. Crude protein
yield and total digestable nutrient (TDN) per lOa was positively correlated with
fresh forage yield and dry matter yield. Sparta produced the greatest fresh forage,
and Hallayuchae produced the smallest. Sparta had the highest SPAD reading value,
and Hallayuchae had the lowest. SPAD reading was reduced in proportion to
increased planting density. Sparta had greater crude protein yield, and crude fat,
nitrogen free extract (NFE) and TDN contents and Youngsanyuchae and
Hallayuchae had lower contents while Youngsanyuchae and Hallayuchae had greater
crude fiber and crude ash contents and Sparta had lower contents. Crude protein
yield, and crude fat. NFE and TDN contents were decreased as planting density
was decreased, while crude fiber and crude ash contents were increased as planting
density was decreased.

목차 (Table of Contents)

• 緖言
• 材料 및 方法
• 結果
• 1) 生育反應
• 2) 收量性 變化
• 3) 粗成分 變化
• 考察
• 適要