窒素施肥および収穫前の降雨が小麦品質に及ぼす影響

概要

論文の詳細を見る
The effects of nitrogen fertilizer and pre-harvest rainfall on wheat quality (protein content in grain, flour viscosity measured by a Brabender amylograph and brightness of flour) were studied in two winter wheat varieties, Chihokukomugi and Hokusin, grown in Hokkaido Prefecture. Pre-harvest sprouting, mainly triggered by pre-harvest rainfall, activated α-amylase in the grain, lowered flour viscosity and degraded flour brightness (L^*). Incidence of pre-harvest sprouting increased after 10 d post-maturity because the level of grain dormancy declined over time. Therefore, early harvest after maturity is recommended for producing wheat grains with high quality. A varietal difference in pre-harvest sprouting tolerance was examined between Chihokukomugi and Hokusin. Hokusin was more tolerate to pre-harvest sprouting than Chihokukomugi because of lower α-amylase activity, for which Hokusin had a characteristics of higher viscosity as compared to Chihokukomugi. Tolerance to pre-harvest sprouting also affected flour brightness; Hokusin with fewer sprouting grains exhibited higher flour brightness than Chihokukomugi. Thus, the pre-harvest sprouting tolerance was effective to prevent the degradation of flour brightness. A top dressing of nitrogen fertilizer increased protein content in the grain; however, a negative correlation was observed between protein content and flour brightness. Especially, values of flour brightness decreased sharply when protein content in the grain became more than 110 mg g^<-1>.
社団法人日本土壌肥料学会の論文
1999-08-05

窒素施肥および収穫前の降雨が小麦品質に及ぼす影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク