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1 977～ 1 998年在陕西吴旗、安塞半干旱黄土丘陵区对沙棘的水分生理生态及群落学特性进行了分析研究。试验结果表明 :( 1 )沙棘有一定的耐旱能力 ,为广生态幅植物 ;( 2 )沙棘生长迅速 ,竞争力强 ,第 3～ 4年即可形成茂密的单优群落 ,以后随着自然稀疏 ,能形成良好的灌木—草本群落 ;( 3)沙棘适应半干旱黄土丘陵区生境的水分生理生态特性是 :束缚水含量随干旱加剧而上升 ,束缚水与自由水比值随干旱加剧而增大 ,同时 ,在旱季 ,沙棘蒸腾强度减弱 ,叶水势降低 ,临界饱和亏增大 ,持水力增强。研究沙棘水分生理生态及群落特性为沙棘的抗旱造林、引种、育种、提高水分生产力及改善沙棘林的经营管理提供了科学依据。
From September 1977 to 1998, the water eco-physiology and community characteristics of Hippophae rhamnoides were analyzed in the semi-arid loess hilly region of Wuqi, Ansai, Shaanxi Province. The results showed that: (1) Seabuckthorn has certain drought tolerance ability, which is a kind of broad-leaved plants; (2) Seabuckthorn grows rapidly and has strong competition ability. In the 3rd ~ 4th years, (3) Hydrological ecophysiological characteristics of seabuckthorn adapting to the habitat of semi-arid hilly region are as follows: the content of irreducible water increases with the increase of drought, and the ratio of irreducible water to free water increases with the increase of drought In the meantime, during the dry season, the transpiration strength of seabuckthorn decreased, the leaf water potential decreased, the critical saturation loss increased, and the water holding capacity increased. The study of water ecophysiology and community characteristics of seabuckthorn provides scientific basis for drought-resistant afforestation, introduction and breeding of seabuckthorn, increasing water productivity and improving the management of seabuckthorn forest.