研究30,200或400公斤氮/公顷对再生1～12周岸杂狗牙根消化率和硅含量的影响。每公顷施400公斤氮时,湿润和干旱季节的消化率分别以再生1周(60.1%)和5 The effects of 30, 200 or 400 kg nitrogen / ha on root digestibility and silicon content of 1 to 12 weeks old canopies were studied. When applying 400 kg nitrogen per hectare, the digestibilities of wet and dry seasons were respectively calculated by one week (60.1%) and 5