Comprehensive Evaluation of the Effect on Different Transformation and Cultivation Models on Natural Secondary Quercus mongolica Forest in Daxing'an Mountains
In this paper, the natural secondary forest of Quercus mongolica was selected as the experimental area in Daxing'an Mountains.The strip cultivation was divided into 6 m (S1) , 10 m (S2) , 14 m (S3) and 18 m (S4) sample plots according to the bandwidth.The strip length was 300 m.The area of 6 sample plots was divided into 25 m2 (G1) 、100 m2 (G2) 、225 m2 (G3) 、400 m2 (G4) 、625 m2 (G5) 、900 m2 (G6) were reserved.The coniferous and broad-leaved tree species in the strip were cut down except for the purpose.Each strip was divided into three plots with an average length of 100 m.Pinus sibirica, Pinus sylvestris and Larix gmelinii were planted separately, and stand and site conditions were selected.Similar plots were used as control plots CK.A comprehensive evaluation index system covering 38indexes, such as litter water holding capacity, vegetation biodiversity, soil physical properties, soil chemical properties, photosynthesis and growth of regenerated seedlings, was established.The results showed that the improvement scores of different models were S2 (0.757)>G2 (0.740)>S3 (0.446)>G3 (0.216)>G1 (0.158)>S4 (0.001)>S1 (-0.111)>G4 (-0.304)>G5 (-0.604)>CK (-0.608)>G6 (-0.690) .Among them, S2 plot and G2 plot had the highest comprehensive score, indicating that 10 m (S2) strip cultivation and 100 m2 (G2) block cultivation had the best effect, and were most suitable for the cultivation of natural secondary forest of Quercus mongolica in Daxing'an Mountains.The research results provided a scientific and reliable theory for the sustainable management of natural secondary forest of Quercus mongolica in Daxing'an Mountains.
NETL
NSTL
万方数据
维普
