【摘要】 采用盆栽、接菌的方法,研究了不同施钾量(0,75,150,300 kg/hm2)对2个小麦品种(济麦22、铭贤169)生长及叶锈病的影响。结果表明,随着施钾量的增加,小麦叶锈病发生的普遍率和严重度呈降低的趋势,济麦22叶锈病发生的普遍率和严重度明显低于铭贤169;随着施钾量的增加,小麦生物量(鲜质量、干质量)和吸钾量均呈增加的趋势,说明施钾可以促进小麦生长和钾养分吸收,从而提高小麦对叶锈病的抗性。但是2个小麦品种的施钾抗性表现略有不同,与不施钾处理相比,济麦22施钾(300 kg/hm2)的小麦鲜质量、干质量、钾含量、吸钾量分别提高20%,14%,37%和56%,普遍率和严重度分别降低60%和67%。更多还原

【Abstract】 Pot experiment was designed in a randomized complete block with four potassium treatments(0,75,150,300 kg/hm2)and seven replications and conducted to study the effect of potassium chloride applied on the growth of two wheat cultivars(Jimai 22 and Mingxian 169)and the resistance to leaf rust disease by inoculation. The results indicated that incidence and severity of wheat leaf rust disease from two wheat cultivars both had a declined tendency with the rate of potassium application increase. The incidence and severity of wheat leaf rust from Jimai 22 cultivars were significantly lower than that from Mingxian 169 cultivars. At the same time, the biomass(fresh weight, dry weight)and potassium uptake from two wheat cultivars increased with the increased rate of potassium application.These showed that potassium application could help to promote not only wheat growth and uptake K, but also improve wheat leaf rust resistance. However there was some resistance difference between two wheat cultivars. Compared with the treatment of without potassium application(K0), fresh weight, dry weight and K uptake from Jimai 22 cultivars increased by 20%, 14% and 56%, respectively, and the incidence and severity of wheat leaf rust disease decreased by 60% and 67%, respectively.更多还原