抄録
The procedure of the stem elongation and increasing tillers which are the important elements for determining the yield and quality of mat rush, had been investigated during the growing period from planting to harvesting in a paddy field. From the results of this studies, the growing characteristics of mat rush were cleared and the basic principles to improve the cultivation have been learned. Namely, so as to increase good mat rush, long stemmed and good quality ones have to be more harvested. The following three items should be taken: 1. From the results of this studies on the growth habits, it was ascertained that the new tillers which would grow to long good stem, had generated in the period from the last decade of May to the first decade of June. Therefore, its culture must be carried out to increase the number of new tillers growing in this period, and to accomplish the sufficient and vigorous development with them. 2. As a result of investigation on the relation of principal bud and new tillers, it was found that principal bud of new tillers which would grow to long stemmed, had already started the growth at the second decade of March. The fact suggests the new method for more yield of long rush by increasing the number of tillers on and from the second decade of March. 3. But excessive tillers grown prior to the first decade of April, namely the tendency of premature, result the development of many short stems and continuous growth of tillers. Therefore the growth advances for the earlier stage than normal, almost all the tips of long stems become rotted by over-ripening, and the yields of good long stems decrease which are to grow from late May to early June.
