Scientia Silvae Sinicae ›› 2020, Vol. 56 ›› Issue (4): 12-21.doi: 10.11707/j.1001-7488.20200402
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Xiaorong Wang1,3,Lei Lei1,2,Tian Fu3,Lei Pan3,Lixiong Zeng1,2,*,Wenfa Xiao1,2
Received:
2018-07-20
Online:
2020-04-25
Published:
2020-05-26
Contact:
Lixiong Zeng
CLC Number:
Xiaorong Wang,Lei Lei,Tian Fu,Lei Pan,Lixiong Zeng,Wenfa Xiao. Short-Term Effects of Selective Cutting for Tending on Leaf Litter Decomposition Rate and Nutrient Release in Pinus massoniana Forests[J]. Scientia Silvae Sinicae, 2020, 56(4): 12-21.
Table 1
Description of sample plots in 2016"
项目Item | 未择伐 No-cutting | 除灌 Shrubs cutting | 伐除非马尾松 Non-P. massoniana cutting | 伐除优势马尾松 Dominant P. massoniana cutting |
海拔Altitude/m | 1 222.5 | 1 211 | 1 177.9 | 1 169 |
坡度Slope/(°) | 35 | 34 | 33 | 33 |
坡向Aspect | 西北Northwest | 西北Northwest | 西北Northwest | 西北Northwest |
郁闭度Canopy density | 0.7 | 0.7 | 0.6 | 0.3 |
林分密度Stem density/hm-2 | 2 116 | 1 400 | 1 288 | 1 064 |
平均胸径Mean DBH/cm | 10.5 | 14.0 | 13.1 | 8.3 |
主要树种Main tree species | 马尾松P.massoniana, 茅栗C.seguinii, 光皮桦B.luminifera, 漆树T.vernicifluum, 木姜子Litsea ichangensis | 马尾松P.massoniana, 光皮桦B. luminifera, 漆树T.vernicifluum, 香椿Toona sinensis, 茅栗C.seguinii | 马尾松P.massoniana, 漆树T. vernicifluum, 盐肤木R. chinensis, 木姜子Litsea ichangensis, 檫木Sassafras tzumu | 马尾松P.massoniana, 光皮桦B.luminifera, 漆树T.vernicifluum, 香椿Toona sinensis, 盐肤木R.chinensis |
Table 2
Initial nutrient concentrations of leaf litter in the P. massoniana forests under different selective cutting treatments"
项目Item | 未择伐 No-cutting | 除灌 Shrubs cutting | 伐除非马尾松 Non-P. massoniana cutting | 伐除优势马尾松 Dominant P. massoniana cutting |
碳含量C content/(g·kg-1) | 450.75±4.68a | 467.63±2.15a | 400.63±18.41b | 500.25±24.82a |
氮含量N content/(g·kg-1) | 11.50±0.19a | 11.30±0.56a | 8.65±0.41b | 8.32±0.96b |
磷含量P content/(g·kg-1) | 0.41±0.04a | 0.29±0.02a | 0.31±0.05a | 0.35±0.02a |
碳氮比C/N ratio | 39.24±0.82c | 41.72±2.32bc | 46.28±1.16b | 61.65±4.86a |
碳磷比C/P ratio | 1 134.32±116.24a | 1 637.19±117.24a | 1 392.35±218.04a | 1 429.38±91.68a |
氮磷比N/P ratio | 28.91±2.92b | 39.15±0.66a | 30.27±5.05ab | 23.65±2.50b |
Table 3
Two factor variance analysis for decomposition rate and nutrient release rate (F value)"
因素Factor | 分解速率 Decomposition rate | C释放率 C release rate | N释放率 N release rate | P释放率 P release rate |
处理Treatment | 37.89** | 12.55** | 4.02* | 0.35 |
时间Time | 250.55** | 158.85** | 82.32** | 2.37 |
处理×时间Treatment × time | 144.22** | 85.70** | 43.17** | 1.36 |
Table 4
Decomposition equation and coefficients of leaf litter in the P. massoniana forests"
处理Treatment | 拟合方程 Fitted equation | 相关系数 Correlation coefficient | 分解速率 Decomposition rate /(g·g-1a-1) | 凋落叶分解50%所需时间 Time for 50% leaf litter decomposition/a | 凋落叶分解95%所需时间 Time for 95% leaf litter decomposition/a |
未择伐No-cutting | y=99.769e-0.304t | 0.889 | 0.304 | 2.28 | 9.85 |
除灌Shrubs cutting | y=97.594e-0.397t | 0.889 | 0.397 | 1.74 | 7.55 |
伐除非马尾松Non-P. massoniana cutting | y=99.969e-0.311t | 0.855 | 0.311 | 2.23 | 9.63 |
除优势马尾松Dominant P. massoniana cutting | y=98.742e-0.315t | 0.937 | 0.315 | 2.20 | 9.51 |
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