摘要： 通过三元二次通用旋转组合设计，研究了烟草赤星病病情指数与移栽期（X1）,饼肥施用量（X2）及后期补钾量（X3）之间的关系，结果表明。赤星病病指与移栽期呈一极大值的抛物线关系，通过调整移栽期避开流行期，可以减轻赤星病为害，在一定范围内，随着饼肥施用量和后期补钾次数的增加，赤星病有减轻的趋势。根据试验结果组建了病情指数与三项农业措施间的数学模型：Y=19.185+0.853x1-0.847x2-0.640x3+0.8x1x3+1.8x2x3-3.174x12-1.407x22-0.912x32.并依此模型，进行了模拟寻优。
关键词:
烟草赤星病,
移栽期,
饼肥量,
补钾量
Abstract: Using the commutative combination design of quadratic regression,the quantitative relationship between the disease index of tobacco brown spot and comprehensive farming measures(transplanting-date X1;the application of cake fertilizer X2;the application of potassium fertilizerX3)was studied during 1994 in Yuzhou county, Henan province.The results showed that the relationship between disease index and transplanting date(X1) can be expressed aparabola of maxinum.By changing transplanting date in order to avoid the epidem is season, disease level could be decreased. With increasing amount of cake fertilizer(X2)and potassium fertilizer (X3),the disease index also be reduced A mathem aticm odelof relation between disease index and farming measures was set up Y= 19.185+0.853X1-0.847X2-0 .640X3+0.8X1X3+1.8X2X3-3.17X12-1.407X22-0.912X32. According to this model,the best measure cambinations were found out.
Key words:
Tobacco brown spot,
Transplanting date,
Cake fertilizer,
Potassium fertilizer
中图分类号:
张振臣, 孙青, 吴青, 闫胜甫, 李彦彬. 应用栽培措施提高烟草对赤星病的抗性研究[J]. 华北农学报, 1996, 11(4): 58-62. doi: 10.3321/j.issn:1000-7091.1996.04.012.
Zhang Zhencheng, Sun Qing, Wu Qing, Yan Shengfu, Li Yanshan. A Study on Increasing Resistance to Tobacco Brown Spot(Alternaria alterhata)by Cultivated Measures[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1996, 11(4): 58-62. doi: 10.3321/j.issn:1000-7091.1996.04.012.