棉の根群の伸長に関する研究

概要

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1. The upland cotton plants (Kanno-ichigo) were planted in the root-boxes and investigations were made concerning the growth process of root-system and the influences which were exerted upon the 2 nd period-growth by several managements and the relation between the growing process of root-system and that of main stalks. These managements are as follows:- (1) Over nitrogenous manure division (2) the defoliation division (3) the trimmed-root division (4) the ringing division (5) the division where growth-hormon (0.001%) was irrigated under the ground (6) the division where growth-hormon (0.002%) was sprayed over the plant. 2. Three growth period can be seen in the growth process of root-system of cotton plant:- the 1st growth period lasts until the beginning of flowering and is followed by the non-growth period (for 20 days), and then comes the 2 nd growth-period. 3. The growth of root-system in the 2 nd growth-period is much accelerated by the above-mentioned managements. 4. The growth process of main stalks and that of root are almost alike. But even in the non-growth-period of root system, main stalks continue to grow though in a small degree. 5: In the 1st growth-period, the prime in growth of root-system precedes a little that of main stalks, but in the 2 nd growth-period the relation is vice versa.
日本作物学会の論文
1952-07-20