水稲成苗による複条並木植栽培の収量性

日本作物学会紀事

真鍋 孝¹  片野 學¹  難波 正孝¹ 

[1] 九州東海大学農学部

关键词: 6th leaf emerging seedlings;    成苗;    Koshihikari;    コシヒカリ;    Minaminishiki;    ミナミニシキ;    Multiple row planting;    複条並木植;    Transplanting method;    移植法;    Yield;    収量;    Yield components;    収量構成要素;   

DOI  :  10.1626/jcs.74.218

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In 1986, a new-type transplanting machine for the 6th leaf-emerging seedlings was introduced to two innovative farmers' groups at Kikuchi district in Kumamoto Prefecture where transplanting machines for the 4th or 5th leaf-emerging seedlings were used since around 1975 to increase grain yield. One of the agricultural practices used in Yamagata Prefecture for the new-type transplanting machine, is a so-called "multiple row planting" method in which every 6 or 8 rows with 30-33cm row spacing were separated by 60cm. A yield survey was conducted in two paddy fields for Koshihikari an early variety and seven paddy fields for Minaminishiki that is late variety. Grain yield per unit land area at the outermost row with 60cm distance between the units of multiple rows for Koshihikari was 82% and 87% to that in the inner rows. For Minaminishiki, grain yield per unit land area in the outermost row was almost the same as that in the inner rows when the distance between the units of multiple rows was 45cm. When the distance was 60cm, grain yield in the outermost row ranged from 78% to 91% of that in the inter rows with one exception where 20-50 t/ha of swine fully fermented compost was applied every year and the grain yield was 109%. Rice plants grown in the outermost row could not increase the number of panicles and grain yield per panicles to compensate for the enlarged occupied land area.

【 授权许可】

Unknown