云南德宏象草与王草的对比试验研究

Study on Adaptability of DeHong Elephant Grass and King Grass in Kunming of Yunnan Province

通过对德宏象草和王草的植物学特征、生物学特性进行观测比较,结果表明:德宏象草种子实生苗生长速度快,其自然扩展蔓延途径主要依靠种子繁殖进行;德宏象草的干物质产量、主要营养成分均极显著高于王草(P<0.01),但德宏象草的生长高度、分蘖数均低于王草;德宏象草幼茎(直径<3cm)的再生能力极显著高于王草幼茎的再生能力(P<0.01),而德宏象草主茎(直径>3cm)的再生能力极显著低于王草主茎的再生能力(P<0.01);德宏象草最适刈割留茬高度为10cm,利用高度应控制在1m左右为宜。

The botanical characteristics and biological were observed and compared. The results showed that the s characteristics of DeHong Elephant grass and King grass eedling was growing quickly and the increasing of DeHong elephant grass depended on seed reproduction.The DM yields and main nutrition ingredient of DeHong Elephant grass were extremely higher than King grass, but the height and tiller number of DeHong Elephant grass were lower than King grass. DeHong Elephant grass young stem （diameter〈3cm） regeneration capacity was extremely higher than King grass （P〈0.01） , but DeHong Elephant grass main stalk （diameter〉3cm） regeneration capacity was extremely lower than King grass （P〈0.01） .The suitable mowing height of Dehong elephant grass was 10 cm, and its utilized height was 1 m.