摘要
通过在辽宁西部将沙棘 (HippophaerhamnoidesL .)与小黑杨 (Populuscv .“Xi aohei”)和欧美杨 64号 (Populuseuramericanecv.“N30 1 6”)的人工林分别按株混和行混两种方式进行混交实验 ,研究了固氮植物沙棘对辽宁西部杨树人工林叶片水分状况的影响规律。研究结果表明 :( 1 ) 2 0 0 0年 6月 ,混交林叶片中的自然含水量和自由水含量明显降低 ,而束缚水 /自由水、自然饱和亏、临界饱和亏和需水程度明显提高 ;2 0 0 0年 9月只有小黑杨混交林叶片呈现相同的变化趋势 ;2 0 0 0年 8月 ,沙棘对杨树人工林叶片水分状况没有显著影响 ;( 2 )在不同月份 ,杨树叶片中的自然含水量与自由水含量的大小顺序为 8月 >9月 >6月 ;而束缚水 /自由水、自然饱和亏、临界饱和亏和需水程度的大小顺序则为 6月 >9月 >8月 ;( 3)沙棘对杨树叶片水分状况的影响程度随杨树品种和混交方式的变化而变化。
The effects of seabuckthorn(Hippophae rhamnoidesL.)which is a nitrogen-fixing plant on the leaf water status variation of poplar plantation in the West Area of Liaoning Province were examined. In the 3 years of project conduction seabuckthorn was introduced into poplar stands of two different varieties(Populuscv.“Xiaohei” and Populus euramericanecv.“N3016”)in two different mixing designs (individual- or strip mixing patterns). The results were as follows: (1) InJune of 2000, the leaf natural water content and free water contentof the mixed stands was significant lowerthanthat of the pure one, while the bound water/free water, natural saturation deficit and critical saturation deficit was contrary. In September of 2000, only the trend of Populuscv. 'Xiaohei'were same to theresults in June. In August of 2000, the seabuckthorn had no significant effects on theleaf water status of poplar plantations.(2)In June, August and September, the sequence of leaf natural water content and free water content was August>September>June, while for bound water/free water, natural saturation deficit and critical saturation deficit, it was June>September>August.(3)The effect of seabuckthorn on theleaf water status varied with poplar variety and mixing patterns.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2005年第2期179-182,共4页
Journal of Arid Land Resources and Environment
基金
国家杰出青年基金 (3 0 12 5 0 3 6)
瑞典国际科学基金 (D/ 2 0 5 2 -2 )资助项目
