ID  220 
File  
Title Transcription  インドガタ タンカン カイリョウ イネ ノ オンタイ ニ オケル シュウリョウセイ

Title Alternative  Yields of SemiDwarf Improved Varieties of Indica Rice in the Temperate Zone

Authors  
Abstract  To analyze the relation between yields and yield components of indica，japonica and intermediate types of rice in the temperate zone，an analytical survey on the varietal difference of paddy yields was carried out in the Tropical Agriculture Research Center in Tsukuba Science City situated 60 km from Tokyo. Ten varieties，consisting of 6 semidwarf improved varieties of indica riceTaichung Native 1，IR 2061，IR 36，C 463，IR 24 and Suweon 258，2 intermediate types of riceArborio J 1 and British Honduras and 2 japonica types of riceNihonbare and Reiho，were transplanted with the randomized block method of 4 replications on 21st May 1981. 1. The paddy yield was the highest for Suweon 258 (80 kg/a)，and it showed a decrease in the following order :IR 24(72kg/a)≒IR206I(69kg/a)>C463(65kg/a)≒IR36(63kg/a)≒Taichung N.1(61kg/a)≒Nihonbare(60kg/a)>Reiho(55kg/a)>B. Honduras(49kg/a)>Arborio J 1(36kg/a). In other words，the yield of semidwarf improved varieties of indica rice was higher than those of japonica intermediate types of rice. 2. The number of panicles/㎡ was superior in IR 36，Suweon 258，Taichung N.1 as compared with those of C 463，B. Honduras and Arborio J 1，which were tall varieties. The number of spikelets/㎡ was also superior in Suweon 258，C 463，IR 2061 and IR 36，which were influenced either by an increase of the number of panicles/㎡ or an increase of the number of spikelets/panicle，a s compared with 2 intermediate and 2 japonica varieties. The percentage of ripened grains of these semidwarf improved indica types of rice was 5466%，while that of the 2 japonica types of rice was 81%. 3. Although positive correlations between paddy yields，and total weight of plant, number of spikelets/panicle，grain/straw ratio，number of panicles/㎡ and numberof spikelets/㎡，as well as negative correlations between paddy yields，culm height and the weight of 1,000 grains，were found respectively，the number of spikelets/㎡ showed the highest correlation coefficient，r＝0.860*** with paddy yields. The number of spikelets/㎡ closely correlated with the number of panicles/㎡ and also the number of spikelets/panicle. However，correlation between paddy yields and percentage of ripened grains is not consistant，because there is a negative correlation between percentage of ripened grains and number of spikelets/panicle. Thus it was made clear that number of spikelets/㎡ is the main factor contributing to paddy yields.

Publisher  鳥取大学農学部砂丘利用研究施設.

Content Type 
Departmental Bulletin Paper

Link  http://www.affrc.go.jp/db_search/jasi/RN/270667

ISSN・ISBN  02852845

NCID  AN00174665

Journal Title  鳥取大学農学部砂丘研究所報告

Current Journal Title 
鳥取大学農学部砂丘研究所報告

Volume  22

Start Page  67

End Page  73

Published Date  198303

Text Version 
Publisher

Rights  (pdfファイル作成は農林水産省農林水産技術会議事務局筑波事務所)

Citation  鳥取大学農学部砂丘研究所報告. 1983, 22, 6773

Department 
Faculty of Agriculture/Graduate School of Agriculture

Language 
Japanese
