杂交晚稻对稻纵卷叶螟为害的动态补偿模型  

DYNAMIC MODELLING OF COMPENSATION OF LATE SEASON HYBRID TO RICE LEAF-FOLDER (CNAPHALOCROCIS MEDINALIS) DEFOLIATION

作　　者：胡国文[1] 陈忠孝[1] 刘光杰[1] 马巨法[1] 潘群威[1] 

机构地区：[1]中国水稻研究所植保系,杭州310006

出　　处：《中国农业科学》1993年第2期24-29,共6页Scientia Agricultura Sinica

摘　　要：在田间采用人工剪叶方法,测定杂交晚稻汕优10号组合不同生育期对稻纵卷叶螟不同受害水平的补偿反应。结果表明:移栽后0-55天的稻株叶片受害时间的临界补偿方程为DF_(tco)(d)=45.119+(241.809+0.534DF^2)^(1/2)叶片受害时间的临界耐害方程为:DF_tto(d)=45.119±(105.737+0.534DF^2+5.34DF)^(1/2);叶片受害程度的临界补偿方程为:Df_co(%)=(3358.75-168.95DF_t+1.872DF_t^2)^(1/2);叶片受害程度的临界耐害方程为DF_to(%)=-5±(3632.3-168.95DF_t+1.872DF_t^2)^(1/2)。式中DF为模拟受害程度(%),DF_t,为受害时期(移栽后天数)。看出,汕优10号的临界补偿反应的时间为移栽后0-29.5天(播种后41-70.5天),受害程度为0%-58.0%。临界耐害反应的时间为20.6-34.8天(播种后61.6-75.8天),受害程度为0%-26%。In this paper, a late season hybrid cultivar Sanyou-10 was used to determine the compensation abilities of different growth stages through mimic defoliation in field conditions. The results showed: that within 0-55 days after transplanting(DAT) the compensation threshold for defoliation stages (DF_(tco): DAT) could be modelled by DF_(tco)= 45.119±(241.809+0.534DF* DF)^(1/2); the tolerance threshold for defoliation stages (DF_(tto): DAT) modelled by DF_(tto)=45.119±(105.737+0.534DF*DF+5.34DF)^(1/2); that compensation threshold for defoliation levels (DF_(co): %)could be modelled by DF_(co)=(3358.75-168.95DF_t+1.872DF_t*DF_t)^(1/2) and tolerance threshold for defoliation levels (DF_(to): %) modelled by DF_(to)= -5±(3632.3-168.95DF_t+1.872DF_t*DF_t)^(1/2). Here: DF stands for defoliation levels (%). DF_t stands for defoliation stages and the days after transplanting (d). The results indicated that the compensation thresholds of Sanyou-10 for defoliation stages ranged from O to 29.5 DAT(d) or 41-70.5 days after sowing(d), and for defoliation levels ranged from 0% to 58%. The tolerance thresholds for defoliation stages ranged between 20.6 and 34.8 DAT(d) or 61.6-75.8 days after sowing(d), and for defoliation levels ranged from 0% to 26%.

关 键 词：晚稻 稻纵卷叶螟 模型 杂交稻 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]