Abstract:

The characters of flowering and non-flowering bamboo at 1-year-old and 2-year-old,including weight per area,chlorophyll content photosynthetic rate,respiratory rate and the content of N,P and K were analyzed.The results showed that comparing the flowering bamboo with non-flowering bamboo, the mean weight per area and total amount of chlorophyll of 1-year-old and 2-year-old bamboo reduced 12.75% and 21.79% respectively,the mean net photosynthetic rate decreased by 10.02%,the mean light respiratory rate and dark respiratory rate increased by 64.52% and 20.05%.The analysis also showed the flowering bamboo had lower assimilation and stronger dissimilation ability than the non-flowering bamboo.Comparing the N,P and K content in different organs,the parts under ground were most distinct,the N,P and K content in roots for flowering bamboo reduced by 17.02%,33.76% and 13.53% respectively compared with non flowering,and those in the stem under ground reduced by 27.43%,66.63% and 51.17% respectively.But the N,P and K content in the stem,branch and leaf of flowering bamboo were higher comparing with the non-flowering bamboo.

Key words: Dendroclamopsis oldhami, Flowering, Properties of physiology and biochemistry