Viewpoints on the study of economic thresholds of cotton bollworm
栓皮栎种群生殖生态与稳定性机制研究

Quercus variabilis (Fagaceae) is a frequent constructive species in He'nan forests.The reproductive ecological characteristics of Q.variabilis population in different degree disturbed ecotopes in He'nan Province was studied to expound its stable michanism.The results show that each reproductive parameter of populations is greatly changed under different disturbed degree,showing different ecological strategies,which is the main michanism of its stability and recovery.The results also show that the Q.variabilis population recovered mainly through asexal regenaretion under great degree of disturbance.