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两年对100多个小麦品种不同播期、不同施肥条件下小麦纹枯病发生程度的调查结果表明,没有一个品种免疫,但品种间存在显著差异;年度间发病程度有一定变化,而各品种的变幅趋势一致;适当晚播、增胞有机肥和钾肥可降低病指。纹枯病流行的主要原因是播期过早,盲目增施氮肥和氮、磷、钾的比例失调,以及越冬期间的气温偏高等所致,与品种的更换关系不大。经初步鉴定筛选出了部分抗病品种和亲本。在筛选抗病材料时,可以采用一个标准品种为基准,来比较不同年度间所调查品种的抗性差异。
Two years of more than 100 wheat varieties of different sowing dates, the occurrence of wheat sharp blight under different fertilization conditions survey results show that no one species of immunity, but there are significant differences between varieties; annual incidence of a certain degree of change, and the variety Of the same trend of amplitude; appropriate late broadcast, increasing organic fertilizer and potassium can reduce the disease means. The main reason for the prevalence of sheath blight was early sowing, blindly adding nitrogen fertilizer and the imbalance of nitrogen, phosphorus and potassium, as well as the high temperature during wintering, which had little to do with the variety change. After preliminary identification and screening of some resistant varieties and parents. In screening disease-resistant materials, a standard variety can be used as a benchmark to compare resistance differences among the varieties investigated in different years.