竹林の開花枯死現象とその林相回復促進の対策 : 第二報 非開花竹の混生林における竹の開花と一連りの地下茎との関係

Abstract

The present paper is a report of the investigated results on the relations between the flowering culms and the connected rhizome system. The investigated bamboo species are Ph. reticulata, Ph. edulis and Sasa nipponica. 1. as for Ph. reticulata, when they reached to interval flowering period, all culms which developed from a connected rhizome system flowers. The similar tendency on Ph. reticulata was recognized in Sasa nipponica. 2. On Ph. edulis, authors observed both of the flowering and the non-flowering in the culms that developed from the connected rhizome system. Accordingly, The authors did not observe a great number of flowering culms in this grove. 3. As for Ph. reticulata, the flowering bamboo (culms and rhizome) died within several years after flowering. On the flowering bamboo of Ph. edulis, the flowering culms and a part of the rhizome which connected with the flowering culms, died within several years, but the non-flowering culms and great part of the rhizome which sprouted them, are surviving. 4. Ph. reticulata. is mostly sterile and Ph. edulis is little fertile while Sasa nipponica sets many fertiled seeds. 5. In order to reduce the injuries by the flowering and withering of Ph. reticulata in extensive area, it is desirable to plant the bamboo of various flowering period or years.