抄録
Cellulose and non-cellulosic materials (total nitrogen, phosphorus, ash, etc.) were daily measured in order to make clear the changes in the chemical composition in lint during the growing process of cotton fiber, and the results were observed. Cotton variety used for this research was “Rikuchimen Kanno No.1”, a sort of upland cotton. The results obtained are summarized as follows.
1) Absolute weight of cellulose in lint increases linearly from the day in which the growth of wall thickness just begins, until the day in which boll openning just begins, and it is shown that cellulose is synthesized and deposited in lint on the same rate in this period.
2) Absolute weight of non-cellulosic materials shows the maximum weight during the period of the growth of lint elongation and rapidly decreases during the early period of the growth of wall thickness, and later shows constant value, and these non-cellulosic materials may take part in cellulose formation after beginning of the growth of wall thickness and lastly deposit inside wall of lumen.
3) The cellulose content of primary wall with tubular texture is about 19% of total cellulose, and remaining 81% of secondary wall with spiral texture shows evident micellar crystal structure and nearly runs parallel to fiber axis.
4) Further discussion on minor points is made concerning the formation of cellulose.
