00228437

open access

Version of Record

ワイセイトウ ノ サイバイ イクシュガクテキ イギ 1 サイバイチ セヒリョウ オ イ ニシタ バアイ ノ セイイク ノ サイ

Agronomic Significance of the Dwarf Rice (I) : On the differences in the growth in accordance with those in cultivated location and amount of fertilizers

Japanese (日本語)

神戸大学農学部研究報告

10(2)

183-188

神戸大学農学部

1972

2006-09-15

本文ファイルは、国立情報学研究所CiNiiより提供されたものです。

1) Three varieties of normal rice and five varieties or strains of dwarf rice were grown at two locations, Chiba and Saitama, by employing the standard and increased criterion of fertilizers at each of the locations. Number of panicles, and the lengths of panicle, culm and internodes were investigated in relation to the variances due to the variety, location and fertilizer. 2) Panicle numbers increased more in Chiba, where early season cultivation was practiced, than in Saitama, where the season was later, especially in dwarf rices (Table 2). The 1st internode was generally longer in Chiba, but 4th internode tended to elongate in Saitama (Fig. 1). 3) Interactions between location and variety were statistically significant in all of the characters measured, and then it was proved that the degrees of variability of the characters at two locations were different among varieties or strains (Table 1,Fig. 1). 4) The increase of fertilizers resulted in that of the panicle numbers, and the fact was evident in some of the dwarf rices. Increased fertilization also elongated the 4th internode in all of the varieties or strains (Table 2,Fig. 2). 5) Results obtained in the research testing the responses of dwarf rices to the cultivated location and fertilizers seem to contribute to breeding new rice varieties by using dwarf rice.

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