| Pinus massoniana Lamb is one of main afforestation species in south China,widely used in many forest products such as forestry chemical,construction,paper,with great economic value.Due to wrong forest management concepts formed and inappropriate management measures implemented in the past,which lead to the situation of afforestation species in a single continuous cropping and excessive stand density;Masson pine pests occur constantly,that and human disturbance and forest fires have caused great damage to the forest ecological system,seriously affecting the health of the forest,making it difficult to play their own forest ecological benefits and social benefits.Monochamus alternathus is an important borer pest on Pinus massoniana,mainly parasitizing in the weakly growth or felled trees' phloem with its larva,damaging or cutting off screens,effecting nutrient transport.The second age larva bored fresh xylem,resulting in slowly growing of trees,and even withered in large area.More serious is that it is main transmission and dispersal agent of Bursaphelenchus xylophilus.Bursaphelenchus xylophilus is the largest forest disaster in the world at present,widely spreading in Asia,North America and Europe,causing huge losses.In order to effectively control the Monochamus alternatus and Bursaphelenchus xylophilus occur and damage,as well as constructing health Pinus massoniana forest.The paper was based on the survey of 4 different health of Monochamus alternatus and arthropods of Masson pine,analysis of the relationships between quantity of monochamus alternatus and stability and diversity of arthropod,so as to master the rule of the occurrence and development of Monochamus alternatus,put forward to the management strategy in favor of Pinus massoniana forest's health from the management point of view.The main results are summarized as follows:1.Using the method of forest investigation and hanging traps with APF-I Monochamus alternatus attractant trapped alternatus to study the population dynamics of Different types of health Masson pine stands Monochamus alternatus.The results showed that:Monochamus alternatus in Wuyishan area had 1 generation in a year,each monitoring point Monochamus alternatus were beginning in early May,health stand and unhealthy stand ? Monochamus alternatus adults end in mid September,and subhealth stand and unhealthy stand ?Monochamus alternatus adults in late September.The amounts of the trapped Monochamus alternatus of A,B,C,D monitoring point in different types of health Masson pine stands were 73,108,136,162.The harm degree of Monochamus alternatus respectively in health stand,subhealth stand,unhealthy stand ?,unhealthy stand ? are mild harm,moderate harm,severe harm,severe harm.The emergence peak of Monochamus alternatus in subhealth stand and unhealthy stand ? was exactly the same,but different from health stand and unhealthy stand ?.At the peak of unhealthy stand ? and healthy stand trapping the number of Monochamus alternatus were extremely significant difference,unhealthy stand ? and sub-health were significant difference between the amount.Different types of health Masson pine stands peak and the general activity of Monochamus alternatus trapping were not significant;in each stand in different periods of Monochamus alternatus adult female percentage had no significant differences.By means of alternatus female adult autopsy found APF-I Monochamus alternatus attractant agent for the prevention of Monochamus alternatus Hope to also have very good effect.2.Through the investigation on the arthropod in Masson pine stands with different health,1070 individuals of arthropod were obtained,which belong to 2 classes,13 orders,63 families.Arthropods were obtained in each stand are not the same in Order,family,the number of individuals,the similarity coefficients of arthropod groups in different health Masson pine are different.Different types of health Masson pine stands on the stability of arthropod community health stand>subhealth stand>unhealthy stand ?>unhealthy stand ?.Arthropod species richness(S),the number of species(N),diversity index(H'),evenness index(J)of the order are:Health stands>subhealth stand>unhealthy stand ?>unhealthy stand ?;dominant concentration index(C)with the opposite situation,which in Masson pine stands of different types of health.3.With the analysis of the relationship between the amount of Monochamus alternatus occurrence in the forest,the murder rate in Masson pine forests,the diversity and the stability index of Arthropods find that:with the ascent of the amount of Monochamus alternatus occurrence and the murder rate in Masson pine forests,the branch,individuals,diversity index,evenness of Arthropods decrease,dominant concentration index rise;the stability index N1/N2S/N of Arthropods continually decrease,S1/S2 decrease in general.The amount of Monochamus alternatus occurrence and arthropod diversity index is inversely related,the impact is extremely significant.But have a positive correlation with the dominant index and the influence is significant,have a inversely related to arthropods stability index N1/N2,S/N,the impact is significant.the murder rate in Masson pine forests and the diversity index,evenness index of arthropod is inversely related,the impact is extremely significant. |
PDF Full Text Request