Study on the Culm cutting Techniques for Pulp making in Phyllostachys pubescens Stands

There is no obvious difference of the culm yield between culm cutting age of 4～5 and 6～7 years old in the bamboo stands,which are intensively cultivated by soil digging and fertilization. Compared with culm cutting time of December in on year in a common timber bamboo stands,the culm cutting in growing season of March,June and September makes no significant difference in culm yield. But,the great yield decrease will be caused by the cutting in December of off year when should be refrained from culm cutting. As to the relative yield, there is a tendency to be higher by cutting in June or September than in December. The stands yield by cutting times of 1,2,3,4 respectively in one year(March,June, uly,August, September, December)has no significant difference from that by one time cutting in December of a on-year.