四川林业科技

2014, v.35;No.161(06) 17-21

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岷江上游干旱河谷油松刺槐混交林研究
Research on the Mixed Forest of Pinus tabulaeformis and Robinia pseudoacacia in the Dry Valley of the Upper Minjiang River

吴宗兴,吴玉丹,宋小军,彭晓曦,杨柳璐
WU Zong-xing,WU Yu-dan,SONG Xiao-jun,PENG Xiao-xi,YANG Liu-lu

摘要(Abstract):

经过连续6a对岷江上游干旱河谷油松刺槐混交林分的土壤水分、养分、理化性质及林冠结构和效益研究,结果表明:(1)混交林土壤0~40 cm平均含水量比油松纯林增加0.91 g·kg-1、比刺槐纯林增加0.55 g·kg-1;(2)混交林18年后土壤容重比油松纯林减少0.13 g·cm-3、比刺槐纯林土壤容重减少0.10 g·cm-3;(3)混交林土壤有机质比纯林增加0.54 mg.kg-1~1.48 mg·kg-1、土壤碳酸钙含量比纯林减少0.43 mg·kg-1~1.09 mg.kg-1、土壤有效氮比纯林增加6.4 mg·kg-1~19.4 mg·kg-1、土壤有效磷比纯林增加0.36 mg·kg-1~1.37 mg·kg-1、土壤有效钾比纯林减少6.90 mg·kg-1~23.90 mg·kg-1,土壤CEC含量比纯林增加0.23 mg·100 g-1~0.85 mg·100 g-1;(4)混交林林冠面积、林冠厚度、林冠水分截留率分别比纯林提高47.83%~78.95%、40.63%~73.08%、6.15%~8.32%,枯落物饱和持水量是纯林的1.62倍~4.22倍;(5)混交林中油松的树高、胸径比纯林分别提高24.7%和27.35%,混交林年均利润是纯林的7.12倍。
Six years of continuous researches were conducted on the soil moisture,nutrients,physical and chemical properties,structure and benefits of mixed forest of Pinus tabulaeformis and Robinia pseudoacacia in the dry valley of the upper Minjiang River. The main results were as follows:(1) the average soil moisture between 0 and 40 cm in mixed forest increased by 0. 91 g·kg- 1and 0. 55 g·kg- 1than that in Pinus tabulaeformis and Robinia pseudoacacia pure forest respectively;(2) The soil bulk density in mixed forest of 18 years old decreased by 0. 13 g·kg- 1and 0. 10 g·kg- 1than that in Pinus tabulaeformis and Robinia pseudoacacia pure forest respectively;(3) Soil organic matter,soil available nitrogen,soil phosphorus and soil CEC content in mixed forest increased by 0. 54 mg·kg- 1~ 1. 48 mg·kg- 1,6. 4 mg·kg- 1~19. 4 mg·kg- 1,0. 36 mg·kg- 1~ 1. 37 mg · kg- 1and 0. 23 mg ·100 g- 1~ 0. 85 mg ·100 g- 1than those in pure forest respectively; calcium carbonate content of the soil and soil available K decreased by0. 43 mg·kg- 1~ 1. 09 mg ·kg- 1and 6. 90 mg ·kg- 1~ 23. 90 mg ·kg- 1than those in pure forest respectively.(4) The canopy area,canopy thickness and canopy moisture retention rate of the mixed forest increased by 47. 83% ~ 78. 95%,40. 63% ~ 73. 08%,6. 15% ~ 8. 32% than those of the pure forest respectively. The litter saturated water was 1. 62 times ~ 4. 22 times than that of pure forest;(5) The height and diameter in the mixed forest increased 24. 7% and 27. 35% respectively as compared with the pure forest. The profit of mixed forest was 7. 12 times than that of pure forest.

关键词(KeyWords): 油松;刺槐;混交林;岷江上游;干旱河谷
Pinus tabulaeformi,Robinia pseudoacacia,Mixed forest,The upper Minjiang River,Dry valley

Abstract:

Keywords:

基金项目(Foundation): 中央林业项目“退耕还林重点工程区植被恢复模式及配套技术推广示范”研究内容之一

作者(Author): 吴宗兴,吴玉丹,宋小军,彭晓曦,杨柳璐
WU Zong-xing,WU Yu-dan,SONG Xiao-jun,PENG Xiao-xi,YANG Liu-lu

DOI: 10.16779/j.cnki.1003-5508.2014.06.003

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