摘要
研究了２～６ａ生楸树气孔的数量、大小、分布、开闭节律及影响开闭的因素。测定气孔与生长的相关性，建立了树高、胸径、单株材积３个生长系列与每ｍｍ￣２气孔数、气孔开放率、气孔开放数、单叶气孔开放数、气孔开放面积、单叶气孔开放面积等７个变量的关系的线性回归方程。提出气孔开放率６０％以上，每ｍｍ￣２气孔开放数２８０个以上，单叶气孔开放数２０万个以上，可作为楸树优良无性系早期选择指标之一。
The stoma amount,size,distrlbution,regularity of opening-closing and factors influening opening-closing of 2～6year Catalpa bungei were studied.Based on the correlation between stoma and growth,regres-sion equations were established between the three series of growth and seven variables of stoma.characters.More than 60%of stoma opening rate,280 of stoma opening amount for each mm2 and 20万for single leavewere regarded as one of the early selection indcxes of improved clone.
出处
《河南农业大学学报》
CAS
CSCD
1996年第1期65-71,共7页
Journal of Henan Agricultural University
关键词
楸树
气孔性状
生长
早期选择
Catalpa bungei
stoma character
growth correlation
