生根粉对几种笋用竹埋秆育苗成活的影响试验

Effect of Rooting Powder on Survival Rate of Seedling Planted with Culm of Several Shoot-producing Bamboo Species

笋用竹深受各族群众的喜爱，但传统母竹挖篼方式繁殖在生产上受到一定的限制。对勃氏甜竹、缅龙竹和野龙竹3种竹子的1a生、2a生、3a生、4a生竹节灌注生根粉进行埋秆育苗试验。结果表明，灌注生根粉对野龙竹的效果最明显，萌节比均值可达49．20％；其次是缅龙竹，萌节比均值可达43．21％；勃氏甜竹相对最不敏感，萌节比均值仅为38．47％；灌注生根粉对2a生和3a生的竹节效果最显著，萌节比均值可达55．96％-58．44％，1a生和4a生的萌节比均值为25．27％～34．83％，由此得出，缅龙竹和野龙竹的埋秆育苗可采用灌注生根粉的方法进行。

Shoot-producing bamboos are deeply loved by masses of every nationality. However, the pro- duction is limited by the traditional method of propagation with planted root ball. This paper, by the test of seedling with planted culm of 3 species of bamboos： Dendrocalamus brandisii, Dendrocalamus birmanicus, Dendrocalamus semiscandensi, perfusing rooting powder into bamboo knots of one-year-old, two- year-old, three-year-old, and four-year-old bamboos. Results shows that the effect of rooting powder perfusion on Dendrocalamus semiscandens is the most obvious, average germination is up to 49.20% ; less obvious is Dendrocalamus birmanicus, average germination is up to 43.21% ; and comparatively the most insensitive is Dendrocalamus brandisii, average germination is only 38.47% ; the effect on bamboo knots of two-year-old and three-year-old bamboos is the most obvious, average germination 55.96% - 58.44% ; while average germination of one-year-old and four-year-old bamboos 25.27% - 34.83%. It can be concluded that the method of rooting powder perfusion can be adopted for seedling planted with culm of Dendrocalamus birmanicus and Dendrocalamus semiscandens.