油松-沙棘混交模式对生境和油松生长的影响  

Influence of Different Mixed Patterns of Seabuckthorn and Chinese Pine on Habitat and Chinese Pine's Growth

作　　者：白岗栓[1] 侯喜录[1] 张占雄 

机构地区：[1]西北农林科技大学水土保持研究所,杨凌712100 [2]陕西省安塞县科技开发培训中心,安塞717400

出　　处：《林业科学》2006年第8期37-43,共7页Scientia Silvae Sinicae

基　　金：中国科学院野外台站基金项目;中国科学院知识创新工程项目(KZCXI-06)。

摘　　要：在陕北黄土丘陵沟壑区,以油松纯林为对照,对油松与沙棘行状混交、行状混交沙棘平茬、带状混交、宽行混交和宽行混交沙棘平茬林地的沙棘郁闭度、高度、光照强度、土壤水分、土壤密度、土壤空隙度、土壤养分及油松的存活率、高度、地径、顶梢年生长量等进行13年的监测研究。结果表明:行状混交与宽行混交的沙棘郁闭度、高度均高于行状混交沙棘平茬、宽行混交沙棘平茬和带状混交;林地的光照强度为油松纯林的较高,带状混交、宽行混交沙棘平茬、行状混交沙棘平茬的居中,宽行混交和行状混交的较低;土壤储水量在11年后表现为行状混交与宽行混交的较高,行状混交沙棘平茬、带状混交与宽行混交沙棘平茬的居中,油松纯林的较低;土壤密度、土壤空隙度、土壤养分表现为沙棘郁闭度、高度越高,土壤密度越低,土壤空隙度、土壤养分越高。与油松纯林相比,行状混交和宽行混交油松的高度和地径在6年以后明显较低,存活率在7年以后显著降低;行状混交沙棘平茬、宽行混交沙棘平茬与带状混交的油松高度在7年以后较高,行状混交沙棘平茬与宽行混交沙棘平茬的油松高度在10年以后高于带状混交的油松;行状混交沙棘平茬、宽行混交沙棘平茬与带状混交的油松地径在9年以后大于油松纯林的油松地径;行状混交沙棘平茬、宽行混交沙棘平茬和带状混交的油松顶梢年生长量在6年以后较大,行状混交和宽行混交的较小。油松与沙棘混交,行状混交沙棘平茬、宽行混交沙棘平茬和带状混交促进了油松的生长,行状混交和宽行混交降低了油松的存活率,抑制了油松的生长。After 13 years observing the seabuchthorn＇ s crown density and height, the woodland＇ s illumination, soil bulk density, soil porosity, soil nutrient, and the Chinese Pine＇s survival percent, height, basal diameter and top shoot growth of mixed stands of seabuckthorn and Chinese Pine that mixed by rows, by rows and cutting seabuckthorn, by strips, by wide rows, by wide rows and cutting seabuckthorn, and comparing these treatments with pure stand of Chinese Pine in loess hilly and gully region of northern Shaanxi. The results showed that the seabuchthorn＇ s crown density and height of mixed by rows and mixed by wide rows were higher than mixed by rows and cutting seabuckthorn, mixed by strips, and mixed by wide rows and cutting seabuckthorn. Woodland illumination of pure stand of Chinese Pine was higher, mixed by strips, that of mixed by wide rows and cutting seabuckthorn, and mixed by rows and cutting seabuckthorn was in the middle, that of mixed by rows and mixed by wide rows was lower. After 11 years, soil water content of mixed by rows and mixed by wide rows was higher, that of mixed by rows and cutting seabuckthorn, mixed by strips, and mixed by wide rows and cutting seabuckthorn was in the middle, pure stand of Chinese Pine was lower. The higher the seabuchthorn＇ s crown density and height were, the lower the soil bulk densities of different treatments were, and the higher the soil porosity and soil nutrient were. The height and the basal diameter of Chinese Pine that mixed by rows and mixed by wide rows were lower obviously after 6 years, the survival percent was increased obviously after 7 years. The heights of Chinese Pine that mixed by rows and cutting seabuckthorn, mixed by wide rows and cutting seabuckthorn and mixed by strips were higher after 7 years, and the height of Chinese Pine that mixed by rows and cutting seabuckthorn, mixed by wide rows and cutting seabuekthorn were higher than that mixed by strips after 10 years. The basal diameter of Chinese Pine that mixed by rows and cutting seab

关 键 词：油松 沙棘 混交模式 生境 生长量 

分 类 号：S725.2[农业科学—林木遗传育种]