火力楠杉木混交林生长效果研究

Fire nan cunninghamia lanceolata mixed forest growth effect research

在马尾松采伐迹地分别营造火力楠杉木混交林、纯林,经过12年的经营,对不同林分的生长量、土壤理化性质等进行了调查对比。结果显示:火力楠杉木混交林能提高森林郁闭度、林分生长量、林木生长量、改善土壤肥力。火力楠杉木混交林郁闭度,分别比火力楠杉木纯林郁闭度大2.2%、3.3%,树高分别大1.0%、2.46%,胸径分别粗9.98%、25.73%,冠幅分别大8.19%、46.76%,枝条分别长9.15%、50.49%,枝下高分别高1.0%、18.75%,单株材积分别大23.53%、96.88%,蓄积量分别多16.94%、61.44%。林土壤理化性状N、P、K,分别比纯林增加2.26%、4.51%,3.64%、5.56%,1.72%、3.14%。

In pinus massoniana deforested respectively build fire nan cunninghamia lanceolata mixed forest and pure forest, after 12 a management, growth, soil physical and chemical properties of different forest stand investigation contrast. Results showed： fire nan cunninghamia lanceolata mixed forest can improve the forest canopy density, forest stand growth, tree growth, improve soil fertility. Fire nan cunninghamia lanceolata mixed forest canopy density, larger than the fire nan cunninghamia lanceolata canopy density respectively 2.2 %, 3.3 %, tree height, respectively, 1.0%, 2. 46%, diameter at breast height, respectively, 9. 98%, 25. 73%, crown breadth respectively 8. 19%, 46.76%, long branches respectively 9.15%, 50.49%, 1.0% higher under branch height, respectively, 18.75%, individual volume, respectively, 23.53%, 96.88%, volume of more than 16. 94%, 16.94% respectively. Forest soil physical and chemical properties of N, P, K, than pure forest increased by 2. 26% and 2. 26%, respectively, 3.64%, 5.56%, 1.72%, 3.14%.