山口県で早播栽培した秋播性程度がIII～Vのコムギ品種の収量性に対する 幼穂形成期間における窒素追肥処理の効果

日本作物学会紀事

Hossain Alamgir²  張 立²  松澤 智彦¹  高橋 肇¹  藤本 香奈¹  山口 真司¹  荒木 英樹¹ 

[1] 山口大学農学部;鳥取大学大学院連合農学研究科

关键词: Early sowing;    早播栽培;    Grain number per spike;    一穂粒数;    Grain yield;    収量;    Nitrogen topdressing;    窒素追肥;    Spike development period;    幼穂形成期間;    Wheat;    コムギ;    Winter habit;    秋播性;   

DOI  :  10.1626/jcs.79.468

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Wheat is conventionally sown in November in Yamaguchi. Early sowing (October) is known to decrease the number of spikes per area and the number of spikelets per spike. We examined the effect of nitrogen topdressing at the spike-development period on grain yield of the early sowing wheat. Three wheat cultivars were used: Iwainodaichi and Airakomugi showing medium degree of winter habit, and Akitakko showing strong degree of winter habit. These cultivars were sown early and conventionally in three growing seasons, 2003/2004, 2004/2005 and 2007/2008. Nitrogen was topdressed to each cultivar at their double ridge stage, terminal spikelet stage or flag leaf stage. The early sowing decreased the harvest index and decreased the grain yield by reducing spike number or grain number per spike in Airakomugi and Iwainodaichi. However, nitrogen topdressing increased the grain yields by increasing the higher harvest index or spike number. In Akitakko, the early sowing increased grain yield in some cases and never decreased it. In Iwainodaichi and Airakomugi, the early sowing advanced the spike development period about two months, to December or January, and increased the number of spikes having lighter grains or smaller number of grains. In Akitakko, the early sowing advanced spikelet development only ten days to March, and decreased the number of spikes with smaller number of grains.

【 授权许可】

Unknown