Influence of Abnormally Warm andWet Weather on the Yield and Apparent Quality of Wheat and Two-rowed Barley and Its Related Factors in Northern Kyushu in 1998

[摘要] The abnormal weather did much damage to wheat and two-rowed barley in Kyushu in 1998. The crop situation index and the average yield in Fukuoka Prefecture were 50 and 168 g / m2 for wheat and 52 and 173 g / m2 for two-rowed barley, respectively, the third lowest since 1945. Furthermore, the inspection grade had deteriorated greatly because of the occurrence of damaged grain. Low yield was caused by a decrease in the number of ears and 1, 000-grain weight in response to a high air temperature and high precipitation during growing period. In wheat, the deterioration of apparent quality was caused by an increase in lodging, scab, and sprout because of high precipitation. Immature grains caused by a short ripening period also affected the quality. In two-rowed barley, low quality was due to an increase in husk under-development in response to a shortage of sunshine hours around the heading date and grain with ventral swelling because of high precipitation at the grain-filling stage. The yield and apparent quality of wheat were improved by application of the top dressing at the tillering stage, trampling and earthing under abnormally warm and wet weather.

[学科分类] 农业科学（综合）

[关键词] Air temperature;外観品質;Apparent quality;気温;Crop situation index;降雨;Damaged grain;小麦;Precipitation;作況指数;Two-rowed barley;収量;Wheat;二条大麦;Yield;被害粒