国立研究開発法人 国際農林水産業研究センター | JIRCAS

Ecophysiological Analysis on Effect of Planting Pattern on Biomass Production and Grain Yield in Rice

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Increasing the biomass productivity of rice is a critical research target for improving the yield potential. This paper reviews ecophysiological studies on biomass production as affected by agronomic techniques and cultivars. In addition, we examined the effects of the planting pattern on the biomass production using cv. Takanari, a high-yielding and lodging resistant cultivar. The results showed that greater biomass production and grain yield were observed in plants with the combination of one plant per hill, high hill density and square hill arrangement. The factors responsible for high biomass production in this combination are; (1) vigorous tiller increase at the tillering stage resulting in higher capture of solar radiation, (2) erect leaves in the canopy after the panicle formation stage resulting in an improved light-intercepting character or smaller extinction coefficient, and (3) larger nitrogen accumulation during the ripening period resulting in a smaller decline of photosynthesis as well as a smaller midday and afternoon depression of photosynthesis possibly related to the larger water uptake ability of roots owing to better root-system development. Our results implied that an improvement in biomass production and yield is possible by optimizing the planting pattern and nitrogen management using high-yielding and lodging resistant cultivars in transplanted and direct-sown rice.

刊行年月2008-04-01
作成者SAN-OH YumikoKONDO MotohikoOOKAWA TaiichiroHIRASAWA Tadashi
著者キーワード

light extinction coefficient

light interception

photosynthesis

公開者Japan International Research Center for Agricultural Sciences
データ作成日2008-04-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
42
2
開始ページ79
終了ページ89
DOI10.6090/jarq.42.79
権利Japan International Research Center for Agricultural Sciences
言語eng