Abstract
The floating rice variety, Kanlang Phnom (KLP) and T 136, a non-floating variety, were subjected to deep water treatments, up to a depth of 25 or 45 cm at a plant age of about eight. The effects of the deep water treatments on plant growth were observed. The elongation of the tenth internode of KLP was markedly promoted by the treatments, while the elongation of the internodes of T 136 was not promoted at all. The elongation of the internodes of the third node tiller was also promoted in KLP, while that of the internodes of the third node tiller of T 136 and the fifth node tiller of both varieties was not promoted. The growth of tillers which had emerged from the subtending leaf sheaths was promoted, while that of the tillersNote 1) which were still inside the subtending leaf sheaths was inhibited. The elongation of leaf blades and leaf sheaths of the main stem and tillers was also promoted by the deep water treatments without any difference between the two varieties.
