三叶木通叶片生长生物学特性研究

STUDIES ON THE BIOLOGICAL CHARACTERISTIC OF LEAF GROOTH OF Akebia trifoliata

用三叶木通（Ａｋｅｂｉａｔｒｉｆｏｌｉａｔａｋｏｉｄｚ）二年生实生苗为试材，对其叶片生长的生物学特性进行了研究。结果表明：三叶木通全株叶片生长期间呈现出８个生长高峰，母茎叶片生长为第１个高峰，生长期４０ｄ左右；第１次攀援茎叶片生长为第２，３，４个高峰，生长期１００左右；第２次攀援茎叶片生长为第５个生长高峰，生长期１２０ｄ左右；第３次攀援茎叶片生长为第６，７，８个高峰，生长期１６０ｄ左右。全株叶片生长期２４０ｄ左右，可划分成３个时期：母茎叶片生长期，叶片速生期和叶片缓生期。广义方差分析结果表明，这种划分既必要且合理。

The growth habit of leaf of Akebia trifoliata was studied.The results showed thatthe growth of individual leaf had eight obvious peaks.The leaf growth of maternalvine was the first peak and its growing period was about 40 d.The second,thirdand fourth peaks are the leaf growth of the first branch period and the growing periodwas about 100 d.The leaf growth of second branch was fifth peak and the growingperiod was about 120d.The third branching had three peaks of leaf growth that theywere the sixth,seventh and eighth,respectively.The growth period of individual leafwas about 240d and can be divided into such threestages as maternal vine,rapid-growthand slow-growth stage. The results of generalized variance analysis showed that this division is both necessary and desirable.