An analysis of annual dynamic growth of test-tube plantlets of Bambusa oldhami

The number , basal diameter and height of new plantlets of survived test-tube plantlets of Bambusa oldhami are measured every month with the method of random sampling to study the annual growth rules of it .The results show that the average monthly basal diameter of new plantlets increases from month to month and the average height shows normal distribution .Transplanted test-tube plantlets can produce new plantlets during a period of 8 months , with a growth peak occurring in August when 23.8 % of the annual total quantity are produced .The height growth of new plantlets lasts for 47 days and plantlet can reach a height of 114.4 cm on average .The average daily growth height is 2.43 cm and the maxium is 6.86 cm .On the average , each test-tube plantlet produces 42.5 new plantlets annually .The above-mentioned shows that test-tube plantlets of Bambusa oldhami are good materials for the establishment of stool gardens or cutting-producing gardens .[ Ch , 4 tab .9 ref .]