辣椒拟种群对模拟昆虫捕食行为的反应

Response of Capsicum frutescens metapopulation to simulated insect herbivorous behaviors.

基于拟种群理论,运用方差分析法、主分量分析法及植物生长分析法,研究7月高温期辣椒拟种群不同程度的剪叶对模拟短期虫害的反应.结果表明,辣椒具有较强的补偿能力;老叶的数量、干重和叶面积随剪叶程度的增加而下降,新叶则相反,但总叶数量相近;总叶面积和干重受老叶影响大,差异显著;枝的数量、干重、长度差异不显著;果、花、花蕾的数量差异也不显著,但干重差异显著;用数量指标代替干重、叶面积和长度等指标来进行植物的生长分析,仅对组元个体间干重极差小的拟种群适用;

Based on the theory of metapopulation, this paper studied the response of different leaf cutting Capsicum frutescens metapopulation to simulated short term insect pestes during high temperature period in July.Variance analysis (ANOVA),principal component analysis(PCA)and plant growth analysis were applied.The result shows that C.frutescens had a strong compensatory ability.The number,dry weight and leaf area of old leaves decreased with increasing leaf cutting ,but contrarily for new leaves.The total leaf number did not show any significant difference,but the total area and weight of leaves were significantly different,because of the influence of old leaves.The number,weight and lenght of branches were not significantly different with different treatments, and the number of fruits,flowers and flower buds also showed no significant difference.However,the difference of their dry weights was significant.It is practical to use number indexes,but not dry weight,leaf area and length for plant growth analysis in metapopulation,when the difference of dry weight between modulars is small.It is suggested that a certain degree of herbivory might be beneficial to the growth and fruit yield of C.frutescens during the high temperature period.