Effects of Different Interplanted Species on Growth and Plant Diversity in Cunninghamia lanceolata Plantations
Michelia gioii,Pachylarnax sinica,Taxus wallichiana and Afzelia xylocarpa were interplanted into a thinned Cunninghamia lanceolata plantation. Comparing with a pure C. lanceolata plantation without interplanting,the growth and plant diversity of the interplanted plantation was analyzed,with the aim of providing a reference for close-to-nature transformation and sustainable management of C. lanceolata plantations. The results showed that the growth of M. gioii,P. sinica,and T. wallichiana formed different age,multi-layered forests with C. lanceolata. Thediameter at breast height,height,and preservation rate of M. gioii was the highest,and significantly higher than other interplanted species,reaching 10.5 cm,9.8 m,and 82.22％,respectively. The diameter at breast height,height,and preservation rate of A. xylocarpa was the lowest,at 2.4 cm,1.7 m,and 15.66％,respectively. Interplanting with A. xylocarpa,M. gioii and P. sinica had a promotion effect on the breast height diameter and height of C. lanceolata trees,whilst the height significantly increased only for interplanting with A. xylocarpa. There were 60 species in 52 genera of 30 families of undergrowth plants in 4 interplanted and 1 pure C. lanceolata stands. There were 27 species in 25 genera of 27 families in the herb layer,with species of the Gramineae and Asteraceae families being predominant this layer. There were 33 species in 27 genera of 18 families in the shrub layer,with species of Euphorbiaceae,Rubiaceae and Moraceae families being predominant in this layer. The species number of four mixed forest types of C. lanceolata were more than pure forests of C. lanceolata. The diversity of understory plants in the C. lanceolata × M. gioii,and C. lanceolata × P. sinica forests were significantly higher compared to the forests of C. lanceolata × A. xylocarpa and pure C. lanceolata plantations. The performance of different interplanted tree species after comprehensive thinning of C. lanceolata showed that interplanted M. gioii had more advantages in stand growth and plant diversity,and could be used as a reference model for close-to-nature transformation of C. lanceolata plantations in the future.
close-to-nature transformationdifferent age mixed forestCunninghamia lanceolataplant diversitystand growth
万方数据
维普
