论文部分内容阅读
为探明栽培管理措施与黄淮区水稻黑条矮缩病发生的关系,采用田间实地调查法研究了灌水、施氮、落谷密度和防虫网处理对水稻黑条矮缩病发生的影响,并对黄淮区主要水稻品种进行抗(耐)病筛选。结果表明,秧田期减小落谷量和施氮量,发病率最高可分别降低78.5%和77.7%;水稻抽穗前采用浅湿灌溉与深水处理相比,发病率最高可降低70.3%;秧田期防虫网处理与无防虫网相比,发病率最高可降低87.6%;分蘖期不施氮肥处理较过量施氮发病率最高可降低83.5%。黄淮区主要品种抗(耐)病性存在显著差异,抗病和产量性状都较好的品种为新稻20和苏秀10号,而金粳18可能对该病具有较强的耐害性。因此,在黄淮稻区,采用浅湿灌溉方式,适当减少施氮量和落谷量,秧田期采用防虫网处理,并选择抗(耐)病品种,可减轻黑条矮缩病对水稻生产的危害。
In order to explore the relationship between cultivation management measures and the occurrence of rice black-streaked dwarf disease in Huanghuai District, the field investigation was conducted to study the effects of irrigation, nitrogen application, grain-filling density and insect- The main rice varieties in Huanghuai area were screened for anti-resistance. The results showed that in the seedling stage, the highest incidence rate was 78.5% and 77.7%, respectively. In shallow paddy irrigation, the incidence of rice decreased 70.3% compared with that of the deep-water irrigation. The seedling stage Insect-resistant net treatment compared with non-insect net, the highest incidence can be reduced 87.6%; tillering stage without nitrogen fertilizer treatment than the highest incidence of nitrogen can be reduced by 83.5%. There were significant differences in resistance to disease among the main cultivars in Huang-Huai-Habitat, and the cultivars with good disease resistance and yield traits were Xintao 20 and Suxiu 10, while Jinjing 18 might have strong resistance to the disease . Therefore, in the area of Huang-Huaihe River, shallow irrigation mode was adopted to reduce the amount of nitrogen and the amount of grain falling, the insect-resistant net was used in the seedling stage, and the resistant varieties were selected to reduce the effects of black-streaked dwarf disease on rice production The harm.