毛竹种源呼吸性状动态变化分析

通过测定分析 9个毛竹种源 1 996年新竹呼吸性状 ,结果表明 :各种源暗呼吸速率年平均值变化幅度为 0 .8875～ 1 .8630 mg CO2 · dm-2 · h-1,总体上南带 >中带 >北带 ;光呼吸在 1 a中有 5月份和 1 2月份 2个高峰值 ,也同样呈现南带 >中带 >北带的变化 ;各种源 CO2 补偿点曲线变化表现不一致 ,但年平均值波动幅度不大 ,变动范围为 91～ 1 1 2 μL·L-1,有随纬度的增高而减小的趋势 ;各种源带呈现南带 >中带 >北带的变化趋势 ;各种源光合系数普遍呈现 7～ 1 0月较大 ,年平均值排序为北带 >中带 >南带 ,其光合作用产额有随纬度的增高而增大的趋势

Analysis on Respiratory Characters in Different Provenances of Phyllostachy heterocycla cv.pubescens

Through measuring and analyzing respiratory characters new bamboo growing in 1996 of nine provenances of Phyllostachy heterocycla cv pubescens,results show that the mean rate range of dark respiratory is from 0 887 5 to 1 863 0 mgCO 2·dm 2 ·h 1 , in generally,the highest is that in south zone,the lowest is that in north zone There are two peak season of photorespiration in one year,one is in May,another is in December,the largest photorespiration is south zone provenance,the smallest is north zone provenance too The variation of CO 2 compensation point cure are different,but their mean value in one year range from 91 to 112 μL·L -1 ,and tends to decrease with latitude increasing The largest photosynthetic coefficients are from July to October in one year,their mean value tends to increase with latitude increasing,photosynthetic product tends to increase with latitude increasing too