摘要
采用荧光物质示踪技术对早稻稻田生态系统中的水稻白背飞虱拟水狼蛛食物链在抽穗期与乳熟期中营养物质流动进行了定量测定。结果表明:在所施荧光示踪物质3种质量浓度20、50、100mg L中,水稻、白背飞虱、拟水狼蛛的荧光物含量[μg鲜重(g)]随所施荧光物浓度的增加而增加,浓度组间差异达到显著水平,呈现出较为稳定的规律性。早稻抽穗期每头白背飞虱每24h取食水稻00636g,平均每头拟水狼蛛每24h捕食白背飞虱00336g,约6~7头;在早稻乳熟期每头白背飞虱每24h取食水稻00155g,平均每头拟水狼蛛每24h捕食白背飞虱00416g,约16头。结合田间调查数据分析,抽穗期白背飞虱危害低于乳熟期,差异显著;两个水稻生育期3~4龄拟水狼蛛的控虫力差异显著,乳熟期高于抽穗期。
The fluorescent substance tracing method was used to quantitatively measure and analyze the damage to rice plants by the white backed planthopper Sogatella furcifera and the ability of the lycosid spider Pirala subpiraticus to con-trol Sogatella furcifera during the two rice growth stages(the tasseling and maturing stage).The results show that the fluorescent substance content of the rice plant,Sogatella furcifera and Pirata subpiraticus obviously increased with in-creasing concentration of fluorescent substance from 20 mg/L to 50 mg/L to 100 mg/L respectively.During the tasseling stage,rice consumption by Sogatella furcifera was 0.0636 g per insect every 24 h,and the consumption of Soatella fur-cifera by Pirala subpiraticus was 0.0336 g per spider every 24 h,equaling 6-7 planthoppers per day.During the matur-ing stage,rice consumption of Sogatella furcifera was 0.0115 g per insect every 24 h,and the consumption of Sogatella furcifera by Pirata subpiraticus was 0.0416g per spider every 24 h,equaling 16 planthoppers per day.Comparing the two growth stages,the per gram fluorescent substance content of Sogalella.furcifera and Pirala subpiraticus was signifi-cantly higher at the maturing stage than at the tasseling stage.
作者
文斗斗
贺一原
吕志跃
杨海明
王洪全
WEN Dou-Dou;HE Yi-Yuan;LU Zhi-Yue;YANG Hai-Ming;WANG Hong-Quan(College of Life Sciences,Hunan Normal University,Changsha 410081,China)
出处
《昆虫学报》
CAS
CSCD
北大核心
2003年第2期178-183,共6页
Acta Entomologica Sinica
基金
国家自然科学基金重点资助项目(39830040)
关键词
白背飞虱
拟水狼蛛
荧光物示踪
生物量流动
定量测定
Sogatella furcifera
Pirala subpiralicus
fluorescent substance
biomass flow
quantitative analysis
