| In order to select suitable afforestation tree species in northern Hubei and improve the effectiveness of afforestation, the sampling method was used to investigate the afforestation project of the precision eradication project in 2018, and the survival rate, preservation rate and growth of the second year of afforestation of various tree species were compared, and the afforestation effect of each tree species were comprehensively evaluated combined with principal component analysis and clustering. The results showed that there were extremely significant differences in afforestation survival rates, preservation rates, coverage, new shoot growth, and central stem dead rate among the 11 afforestation tree species, among which, the survival rate (96.7%±2.0%) and preservation rate (94.9%±2.7%) of Camellia oleifera were the highest, Pinus elliottii coverage was the largest (0.097±0.011), Robinia pseudoacacia had the longest annual shoots (39.8 cm), and the central stem dead rate of Camellia oleifera, Pinus elliottii and Cupressus funebris were low; the comprehensive evaluation of afforestation (D value) was ranked from high to low, followed by Camellia oleifera, Pinus elliottii, Ligustrum lucidum, Cupressus funebris, Robinia pseudoacacia, Koelreuteria paniculata, Osmanthus fragrans, Bischofia polycarpa, Ginkgo biloba, Cinnamomum bodinieri and Quercus aliena. Through cluster analysis, 11 afforestation tree species were divided into 4 groups; the most suitable tree species were Camellia oleifera, Pinus elliottii and Ligustrum lucidum, the more suitable tree species were Cupressus funebris and Robinia pseudoacacia, the poorly suitable tree species was Koelreuteria paniculata, Osmanthus fragrans, Bischofia polycarpa, Ginkgo biloba, Cinnamomum bodinieri, and Quercus aliena was not suitable. Camellia oleifera, Pinus elliottii, Ligustrum lucidum, Cupressus funebris, and Robinia pseudoacacia had optimal suitability, which can be used as the preferred tree species for forestation in northern Hubei. |
