00225559

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Version of Record

カンチョウ ノ コトナル ヒンシュ ノ ジョウ コウゴサク ガ スイトウ ノ セイイク シュウリョウ ニ オヨボス エイキョウ

Effects of Mixed Planting of Rice Varieties Having Different Plant Length on Growth and Yield of Respective Varieties

Japanese (日本語)

神戸大学農学部研究報告

16(2)

403-408

神戸大学農学部

1985-01-31

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。

This experiment was carried out to investigate the effects of mixed planting of different rice varieties on the characters concerning growth and yield of respective varieties. TKM-6 (early var.) (TKM) and CO-13 (CO) were used as long-culmed variety (L-variety) and Suwon 258 (Suwon) as short-culmed variety (S-variety). Planting density was 30cm×16cm (20.8 hills/m^2). Two levels of fertilizer application were used. At the heading time, plant length of S-variety was longer in mixed stands than in pure stands. Regardless of fertilization and of combined variety, number of stems and dry weights of leaf blade and of stem per m^2 of L-varieties increased in mixed stands, but reverse was the case in the S-variety. In the plot without fertilization, leaf areas of the L-varieties increased in mixed stands, but reverse was the case in the S-variety. In the plot with fertilization, the leaf areas of all the varieties increased in mixed stands. Regardless of fertilization and of combined variety, SLA of all the varieties increased in mixed stands. In the mixed stands of TKM and Suwon, regardless of fertilization, the LWR of S-variety increased as compared with that in the pure stands. In the mixed stands of CO and Suwon, the LWR of the L-variety, regardless of fertilization, decreased, but the LWR of the S-variety in the plot without fertilization decreased and that in the plot with fertilization increased in mixed stands. At the maturing stage, culm length of the S-variety, in general, increased in mixed stands. In the mixed stands of TKM and Suwon, regardless of fertilization, ear length of the L-variety increased in mixed stands. In the mixed stands of CO and Suwon, the ear length of the S-variety in the plot without fertilization decreased in mixed stands. Regardless of fertilization and of combined variety, number of ears, total weights of paddy and of straw per m^2 of the L-variety increased remarkably and those of the S-variety decreased in mixed stands. Number of paddies per ear of the L-variety, regardless of fertilization, increased in the mixed stands of TKM and Suwon, while the number of paddies per ear of the S-variety in the plot without fertilization decreased and that in the plot with fertilization increased in this mixed stands. In the mixed stands of CO and Suwon, the number of paddies per ear of the S-variety, regardless of fertilization, decreased. Weights of 1000 winnowed paddies of the S-variety in the plot with fertilization decreased in the mixed stands of TKM and Suwon. Ratio of paddy weights to straw weights of TKM in the plot without fertilization and that of CO in the plot with fertilization increased in mixed stands. The ratio of the S-variety in the plot with fertilization, regardless of combined variety, decreased in mixed stands.

紀要論文