福岡県農業総合試験場研究報告14（1995） pp 30 - 35
ビール大麦の側面裂皮粒，凸腹粒の気象的発生要因
吉川 亮・水田一枝・山口 修
近年北部九州のビール大麦栽培で問題となっている被害粒の側面裂皮粒と凸腹粒について，統計解析により気象的発生要因を明らかにした。@側面裂皮粒の発生には，主として節間伸長期から出穂期にかけて（特に出穂期前２０日間）の日照不足が関与していた。また，節間伸長期及び登熟後期から成熟期の各時期の多雨と節間伸長期から出穂期の低温も発生に関与しているものと考えられた。A凸腹粒は，５月中下旬の登熟後期から成熟期に降水量が多く，そのうち登熟後期（成熟期１３〜７日前）と成熟期直前（成熟期３日前〜成熟期）の２時期ともに降雨が多い場合に，発生が多くなった。
［キーワード：ビール大麦，側面裂皮粒，凸腹粒，気象，発生要因］
Meteorological Factors of Occurrence of Husk Underdevelopment and Grain with Ventral Swelling in Malting Barley. YOSHIKAWA Ryo, Kazue MIZUTA and Osamu YAMAGUCHI (Fukuoka Agric. Res. Cent. , Chikushino, Fukuoka 818, Japan) Bull. Fukuoka Agic. Res. Cent. 14 : 30-35 (1995)
The occurrence of the two types of damaged grains (husk underdevelopment and grain with ventral swelling) which caused low inspection grade have been problem on the cultivation of malting barley in the north Kyusyu district of Japan in recent years. Therefore, we investigated the meteorological factors of the occurrence of these damaged grains by statistical methods. (1) A main factor of occurrence of husk underdevelopment was the shortage of sunshine hours for internode elongation stage to heading date, particularly for twenty days before heading date. Sub-factors were also involved in precipation at internode elongation stage, precipation for late grain filling stage to date of maturing, and low temperature for internode elongation stage to heading date. (2) A main factor of occurrence of grain with ventral swelling was the large amount of precipation for late grain filling stage to date of maturing, particularly for the thirteenth to seventh day before date of maturing and three days before date of maturing.
[Key words : Malting barley, Damaged grain, Husk underdevelopment, Grain with ventral swelling, Meteorological factor, Percentage of occurrence]
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