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高粱丝黑穗病是当前高粱生产上的主要病害。为寻找简便有效的防治措施,我们在榆次市王都大队进行了种肥试验,观察不同种肥对高粱丝黑穗病发病率的影响。供试品种晋杂4号,4月28日播种,种肥为尿素、硝铵、硫铵、过磷酸钙,以不施种肥为对照。小区面积0.1亩,每处理各施种肥1斤,随机排列,两次重复。播种时随耧溜入。播前和播后10天分别测量了种子层(5厘米处)土壤的 pH 值,各种肥变化情况不一,结果丝黑穗病的发病率也不同(表1)。表1看出,种肥所产生的酸性使种子层土壤 pH 值下降,其中尿素和硝铵下降最多,发病率也最低。据有关资料报道,丝黑穗孢子在酸性条
Sorghum smut is the current main disease in sorghum production. In order to find a simple and effective control measures, we conducted a fertilizer experiment in Wangdu Brigade of Yuci City to observe the effects of different kinds of fertilizers on the incidence of smut of sorghum. Jin hybrid test varieties on the 4th, April 28 sowing, the kind of fertilizer for urea, ammonium nitrate, ammonium sulfate, superphosphate, with no fertilizer as a control. Community area of 0.1 acres, each treatment of fertilizer 1 kg, randomly arranged, twice repeated. Sow with slipped into. Soil pH was measured in the seed layer (5 cm) 10 days before and after sowing, and the results showed that the incidence of head smut was different (Table 1). Table 1 shows that the acidity of the seed fertilizer reduces the pH value of the seed layer soil, with urea and ammonium nitrate declining most and the incidence rate the lowest. According to the information reported, silk spike in acidic spores