Effects of climatic conditions before heading on rice grain quality in miyagi prefecture, Japan

Norichika Miyano, Makie Kokubun

    Research output: Contribution to journalArticle

    Abstract

    In Miygai prefecture, the percentage of the fi rst grade rice-grains (%FGG) is lower in the Sennan area than in other areas. Climatic factors during ripening stage were responsible for the inferior quality. We examined the correlation of the number of panicles per m2 (NOP) with %FGG and climatic conditions before heading in the past 28 years in three areas of Miygai; Sennan, Sendai and Osaki. Before 1993, when Sasanishiki was a dominant cultivar, the number of spikelets per m2 (NOS) negatively correlated with %FGG in all areas, and positively correlated with the number of panicles per m2 (NOP) in the years in which a negative correlation was observed between NOS and %FGG. The NOP negatively correlated with accumulated sunshine hours in July in Sennan, daily minimum air temperature from young panicle formation to meiotic stage in Sendai, and daily minimum air temperature in July in Osaki. In the period from 1994 to 2005, when Hitomebore was a dominant cultivar, NOS negatively correlated with %FGG and positively with NOP. NOP positively correlated with accumulated sunshine hours in June in Sennan, and with daily maximum air temperature from transplanting to summer solstice in Sendai. The effect of the weather condition around heading on %FGG in Sasanishiki was different from that in Hitomebore.

    Original languageEnglish
    Pages (from-to)351-356
    Number of pages6
    JournalJapanese Journal of Crop Science
    Volume79
    Issue number3
    DOIs
    Publication statusPublished - 2010 Aug 17

    Keywords

    • Grain quality
    • Miyagi prefecture
    • Number of grains per head
    • Panicle number per m
    • Weather factor

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Food Science
    • Genetics

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