Abstract
A field experiment was conducted in Chungiu and Jungwon to evaluate growth characteristics, root development, dry matter yield, crude protein yield and palatability according to nitrogen fertilizer level at intercropping cultivation of sorghum $\times$ sudangrass hybrid(hereinafier referred as SSH) and soybean. Nitrogen level was six treatment of Okg, 30kg 60kg, 90kg 120kg, and 150kg per hectare, and cutting date (sorghum $\times$ sudangrass and soybean) was july 28. 1. In the SSH, plant length was increased with increasing nitrogen fertilizer from 0kg/ha to 120kg/ha, but 150kgha treatment was decreased cornpared to 120kg/ha treatment. In the soybean, plant length did not show difference among 0kg, 30kg 60kg, and 90kg per hectare, but 120kg and 150kgfha treatment was on the contrary short. In the SSH, leaf length, leaf width and leaf number were the highest in 120kg/ha treatment, but soybean showed multifarious. 2. Stem diameter of SSH was increased with increasing nitrogen fertilizer. But soybean was thick from 0kg/ha treatment to 60kg/ha treatment, while above 90kg/ha treatment was on the contrary thin. Stem of SSH was hard with increasing nitrogen fertilizer, but soybean was soft with increasing nitrogen fertilizer. Root weight (Dry matter) of SSH was increased with increasing nitrogen fertilizer. On the contrary, soybean was decreased with increasing nitrogen fertilizer. 3. In the dairy cattle and Korean native cattle, palatability according to nitrogen fertilizer was the highest at 90kgha treatment, while 120kgha treatment and 150kgha treatment was the lowest. But in the deer, 30kg/ha treatment of low nitrogen fertilizer was the highest in palatability. 4. Nitrogen content of root of SSH was increased with increasing nitrogen fertilizer(P<0.01). But in soybean, 30kg and 60kg/ha treatment were higher than 0kg, 90kg, 120kg and 150kg/ha treatment(P<0.01). Total niwogen content of soil were high at 90kg 120kg 150kgha trea~ment(P<0.01). 5. Dry matter yield was high at the 90kg 120kg and 150kgha treatment as range from 15, 262kg/ha to 15, 614kg/ha without significant difference among those, but Okgha treatment was the lowest as 11, 183kg/ha (PC 0.05). Protein content of SSH was the highest at 90kg/ha treatment as 8.3 percentage. Soybean was highest at 60kgha treatment as 22.9 percentage. Protein yield was the highest at 90kg/ha treatment as 1, 547.6kg/ha, but Okgha treatment was the lowest as 1, 022.8kg/ha (P<0.01).
