摘要
本研究测定了水稻对稻纵卷叶螟为害的单株水平动态生理补偿效应,同时测定了稻纵卷叶螟为害对水稻经济性状的影响。结果表明:受害叶表观光合强度下降,其幅度与受害程度、叶位及受害后时间有关;剑叶受害后同株未受害的倒二叶则对受害功能叶具有一定的补偿作用,表观光合强度增强,增强幅度与剑叶被害程度和披害后时间有关。在孕穗与抽穗期,幼虫所造成的为害,对水稻经济性状有不同程度的影响,其中结实率与幼虫密度呈负相关,产量损失率与幼虫密度呈正相关;而对有效穗数、每穗粒数及千粒重的影响则不显著。另外,作者从群体和个体水平分别讨论了水稻对稻纵卷叶螟力害的损失与补偿问题。
The dynamic physiological compensation of rice individuals andrice yield components reacted upon the damage of rice leafroller Cnapha-locrocis medinalis Guenee were examined,The results showed that the
decrease of apparent photosynthesis intensities of damaged leaves relatedto the extent of damage,leaf levels,and ime after damage.Therewere some compensation of the last but one leaf for the damaged flag
leaf,the functional leaf.Its apparent photosynthesis intensity increasedwith the extent of damage and time after damage to the flag leaf.The larvae densities in booting and earing stages were negatively cor-related to the seed setting percentage and positively correlated to yieldloss rate;while there were no significant effects on the effective earnumber,grain-number/ear and thousand kernel weight.In addition,therice yield loss and compensation at ndividual and population levels forrice leafroller damage were discussed respectively.
出处
《植物保护学报》
CAS
CSCD
北大核心
1991年第1期1-4,共4页
Journal of Plant Protection
基金
国家自然科学基金
关键词
水稻
稻纵卷叶螟
生理补偿效应
rice
Cnaphalocrocis medinalis
physiological compensation
