稻曲病产量损失估计研究  

Estimation of yield loss caused by rice false smut

作　　者：杨丽敏[1] 陈莉[1] 许娟[1] 刘家成[2] 丁克坚[1] 

机构地区：[1]安徽农业大学植物保护学院,合肥230036 [2]安徽省植物保护总站,合肥230031

出　　处：《安徽农业大学学报》2012年第3期474-477,共4页Journal of Anhui Agricultural University

基　　金：国家科技支撑计划项目(2006BAD02-A06-21;2009BADA6B02)资助

摘　　要：为探寻稻曲病发病程度与水稻产量损失的关系,选择粳、糯、杂交籼稻的4个品种,采用随机区组设计,适度调控病情梯度,按单穗病粒数分级,大样本取样考种的方法,建立了不同水稻类型的稻曲病产量损失模型。结果表明,稻曲病发病程度与稻谷损失率和精米下降率呈正相关且关系密切。经多种数学模型比较,Weibull模型拟合度最好。建立的稻谷减收率模型为:Y1(粳糯稻)=1-exp(-(X+0.999 99)/16.091 6)^1.180 8),R2=0.990 4;Y2(中籼稻)=1-exp(-(X-0.699 99)/24.818 8)^0.8542),R2=0.983 5。精米下降率模型为:Y3(粳糯稻)=1-exp(-(X+0.599 99)/83.499 7)^1.139 6),R2=0.965 5;Y4(中籼稻)=1-exp(-(X-0.499 99)/68.542 9)^1.456 0),R2=0.967 9。Yield loss models of Japonica rice, glutinous rice and hybrid indica rice were set up for analyzing the relationships between disease incidence and yield loss by means of randomized block design, moderate controlling disease gradient, grading by number of diseased grains each diseased ear, and large sampling. The results showed that disease severity of rice false smut was positively correlated to yield loss of rice and decreased rate of polished rice. It has a high fitness degree of WeibuU Model to Rice False Smut among four models. The mathematical models of yield loss of paddy rice caused by rice false smut were as follows： Y1 （Glutinous and Japonica rice）=1-exp（-（X＋0.999 99）/16.091 6）^1.180 8）, R^2=0.990 4; Y2（Hybrid indiea rice）=l-exp（-（X-0.699 99）/24.818 8）^ 0.854 2）, R^2=0.983 5. Mathematical models of rate of polished rice： Y3（Glutinous and Japonica rice）=1-exp（-（X＋ 0.599 99）/83.499 7）^1.139 6）, R2=0.965 5 ; Y4 （Hybrid indica rice）=1-exp（-（X-0.499 99）/68.542 9）^1.456 0）, R^2= 0.967 9.

关 键 词：稻曲病 产量损失 数学模型 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]