Abstract:

The photosynthetic characters of 9 Phyllostachy heterocycla cv. pubescens provenances were determined in 1996 The result showed that all provenances had 2 peaks of net photosynthetic rate (NPR) in one year.The first peak appeared in May,the second peak of southern provenances was earlier than that of other provenances.The provenance with the largest mean NPR came from Jurong of Jiangsu province,and the one with the lowest mean NPR came from Jian′ou,Fujian province.The NPR in each provenance increased with the increasing of latitude,and the provenances with the highest and the lowest NPR for single bamboo were in Hua′an of Fujian province and in Huoshan of Anhui province respectively.The range of light compensation point (LCP) was 570～913 Lux.The provenances with the lowest LCP which could use the light energy effectively were in the middle area,and LCP of those in the northern area was higher than the others.

Key words: Phyllostachy heterocycla cv. pubescens, Provenance, Photosynthetic character