コムギ収量の圃場内変動をもたらす要因の解析と可変量管理の可能性

日本作物学会紀事

池永 幸子¹  稲村 達也¹  井上 博茂¹  吉川 茜¹  松本 憲悟¹  山末 祐二¹ 

[1] 京都大学大学院農学研究科

关键词: Crop management;    栽培管理;    Geostatistics;    ジオスタティスティクス;    Soil physiochemical property;    土壌理化学性;    Standardized partial regression coefficient;    標準化偏回帰係数;    Wheat;    コムギ;   

DOI  :  10.1626/jcs.76.189

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Sources of the variation of wheat yield in paddy-upland rotational fields (rice-wheat-soybean) were examined during the wheat seasons from 2002 through 2004 to evaluate the possibility of the variable rate management that implements the site-specific input of agricultural materials, e.g. fertilizer and seed, in proportion to the variation of these sources in the field for maximum yield. The number of panicles was the largest source of variation contributing to wheat yield among the three yield components (number of panicles, thousand-grain weight and number of ripened grain per panicle). This result proposed the number of panicles as the criterion of variable rate management for maximizing the yield. The number of panicles was effected by the seeding rate via the number of establishment, the amount of nitrogen accumulated in aboveground biomass at spikelet-initiation stage and the number of stems, and in addition, it seemed to be effected by the soil moisture percentage at seeding via the emergence depth. Therefore, the proper management of variable rate seeding in proportion to the soil moisture percentage on dried soil basis at seeding in the field may be able to control the number of panicles in the field to bring the adequate average yield. This variable rate management may control 42.7% of the controllable proportion to total variation of wheat yield in the field.

【 授权许可】

Unknown