黄土丘陵沟壑区油松与沙棘混交油松成林过程研究  

Chinese Pine Growth Mixed with Seabuckthorn in Loess Hilly and Gully Region

作　　者：张占山 白岗栓[2] 侯喜录[2] 卢彬 

机构地区：[1]安塞县延河流域项目办公室,陕西安塞717400 [2]中国科学院水利部西北农林科技大学水土保持研究所,陕西杨凌712100 [3]咸阳市农业科学研究所,陕西咸阳712000

出　　处：《水土保持通报》2006年第2期40-44,共5页Bulletin of Soil and Water Conservation

基　　金：中国科学院知识创新工程项目(KZCXI-06);国家"十五"科技攻关项目(2001BA508B17)

摘　　要：在陕北丘陵沟壑区,以油松纯林为对照,通过对油松与沙棘行状混交、带状混交和宽行混交沙棘平茬、宽行混交沙棘不平茬的油松树高、地径、树冠、顶梢生长、存活率等的监测研究,结果表明,不同方式混交的油松在栽后前3 a的生长状况与纯林无差异。当混交林的沙棘覆盖度达到70%以上后,行状混交和宽行混交沙棘不平茬的油松生长量开始下降,栽后6～7 a大量死亡,第8 a基本死完;宽行混交沙棘平茬的油松,随着平茬沙棘的萌生,油松的生长量大于纯林,在萌生沙棘生长的第3 a,沙棘覆盖度达40%～45%时,油松的生长量明显大于对照;带状混交的油松,当沙棘侵入油松林带后,油松的生长量大于对照,当沙棘的覆盖度达40%～45%时,油松生长速度与纯林的差异明显。不同年份的降水量对油松的生长影响显著,但滞后1 a。After observed Chinese pine＇s height, trunk diameter, top shoot growth, crown diameter, survival percent when mixed with seabuckthorn by row, by strip, by wide row and wide row ＋ cut seabuckthorn and compared them with Chinese pine of only Chinese pine woods in loess hilly and gully region of northern Shaanxi, the results show： Chinese pine＇s growth of mixed woods has no distinctly difference after planted three years later. When mixed seabuchthorn coverage density achieves at 70 %, Chinese pine＇s growth of mixed woods by row and by wide row become slowly, after being planted six to seven years, a flock of Chinese pine begin to perish, eight years later, all of Chinese pine has deceased. As cut seabuckthorn germinate, Chinese pine of mixed woods by wide row ＋ cut seabuckthorn grow faster than that of only Chinese pine woods, after cutting seabuckthorn three years, when germinated seabuckthorn coverage density achieves at 40 % -45 %, Chinese pine＇s growth of mixed woods by wide row ＋ cut seabuckthorn become distinctly faster than that of only Chinese pine woods. When seabuchthorn intruded the strip of Chinese pine, Chinese pine of mixed woods by strip grow faster than that of only Chinese pine woods, eight years later, when seabuckthorn coverage density achieves at 40 % -45 %, Chinese pine＇s growth of mixed wood by strip become distinctly faster than that of only Chinese pine. Annual precipitation has big influence on Chinese pine growth, but the influence lags one year.

关 键 词：油松 沙棘 混交模式 年降水量 

分 类 号：S791.254[农业科学—林木遗传育种] S793.6[农业科学—林学]