红脂大小蠹发生与营林技术和林分因子关系的研究

Study on Relationship of Occurrence of Red Turpentine Beetle with Forest Stand Factors and Production Technology of Forest

笔者在山西省红脂大小蠹(Dendroctonus valens LeConte)发生地区做了连续调查,结果表明:油松抚育间伐林红脂大小蠹危害重于对照林;割脂与未割脂油松林红脂大小蠹危害差异显著(P=0.001),割脂油松林红脂大小蠹危害重于未割脂油松林;过火与未过火油松林红脂大小蠹危害差异显著(P=0.014),过火油松林红脂大小蠹危害重于未过火油松林;油松混交林与油松纯林红脂大小蠹危害无显著差异(P=0.828),混交林不能减轻红脂大小蠹对油松的危害;不同郁闭度下对应的平均有虫株率不完全相同(P<0.000 1),郁闭度为0.3,0.4的林分受害最为严重;阴坡与阳坡油松林红脂大小蠹危害差异显著(P=0.000 1),阳坡油松林红脂大小蠹危害重于阴坡油松林。

The author investigates the damage degree of Red Turpentine Beetle（RTB）to Pinus tabulaeformis in Shanxi Province,and analyzes these comparisons between thinned and non-thinned forest,tapped and non-tapped forest,burned and non-burned forest,mixed forest and pure forest,forest with different rate of coverage,sunny slope forest and shady slope forest.The results show that RTB made a greater harm to thinned forest;the difference between tapped and non-tapped forest was significant（P=0.001）,RTB had higher harm on the tapped forest;the harm was bigger on the forest burned than on the contrast;the RTB harm difference between mixed forest and pure forest was not significant（P=0.828）,mixed forest cannot reduce the damage;the average rates of forest pest are incomplete same in forest with different rate of coverage（P0.0001）,those of coverage rate of 0.3,0.4 have the most serious disaster of forest pest;the variation between sunny slope forest and shady slope forest was remarkable（P=0.000 1）;the RTB harm was heavier on the sunny slope forest than on the shady slope forest.