摘要： 采用田间模拟试验、系统分析和计算机模拟技术,分析了伏蚜对大面积棉田的不同为害程度与产量损失的关系.通过9年研究,现已组建成伏蚜为害程度与产量损失的两个优化模型.田间模拟试验和150万亩推广应用,以及计算机模拟结果表明,1级伏蚜为害程度,即棉株中部起油腻的株率在5%以下,不会减产.故此为害程度可作为伏蚜防治指标的放宽指标.
关键词:
棉花伏蚜,
优化模型,
系统分析,
计算机模拟技术,
防治指标
Abstract: This study analysed the relation between yield loss and damage levels caused by cotton aphids through the field simulated test, systematic analysis and computer analoguing technique. On the basis of nine year's study two selective models were established: Y=14.15909+11.29091X, if the grades of damage ranged from 1 to 3; Y=-12.67929+9.71252X, if the damage grades ranged from 4 to 6. The field simulated test and the farming practice on 1.5 million mu indicated that the aphid damage level of grade 1, i.e. the ratio of cotton plants with aphides in middle of costem was less than 5 per cent, could not cause yield loss, on the contrary could increase the yield by 2.9%. This result was in harmony with that of computer analogue. So the damage degree could be used as a relaxed index for control of summer cotton aphid.
Key words:
Summer cotton aphid,
Computer analoguing technique,
Control index,
Optimum models,
Systematic analysis
苗春生, 孙玉英, 陈来夫, 王步瑞, 高春燕, 杨志中. 棉花伏蚜为害程度与产量损失的优化模型[J]. 华北农学报, 1989, 4(S1): 152-158. doi: 10.3321/j.issn:1000-7091.1989.z1.027.
Miao Chunsheng, Sun Yuying, Chen Laifu, Wang Burui, Gao Chunyan, Yang Zhizhong. A Study on the Optimum Models of the Damage Levels by Summer Cotton Aphid and Yield Loss[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1989, 4(S1): 152-158. doi: 10.3321/j.issn:1000-7091.1989.z1.027.