紫丁香、榆叶梅、珍珠梅水分生理特性的研究

STUDY ON WATER PHYSIOLOGICAL CHARACTERISTICS OF SYRINGA OBLATA LINDL.AMYGDALUS TRILOBA RICKER SORBARIA SORBIFOLIA(L.) A.BR.

以生长在呼和浩特地区的紫丁香、榆叶梅、珍珠梅为材料,研究其小枝的水分生理特性。结果表明:小枝重饱和初始水分亏缺(W SD)程度越大,重饱和相对饱和含水量(RSRWC)越小,失水后水分恢复能力也越低,树木组织受到的伤害越严重;各树种随着重饱和初始水势(ψr)的降低,其重饱和相对含水量(RSRWC)呈下降趋势,当脱水到低于初始失膨点水势后复水,其重饱和含水量就恢复不到初始饱和含水量。

The research studied the water recessive character of rods of Syringa .oblata Lindl. , Amygdalus triloba Ricker , Sorbaria sorbifolia （ L. ） A. Br. in Huhhot The results showed ： As the resaturated initial water deficit increased, the resaturated relative water content （RSRWC） of twigs and the water absorbing ability declined, and the structures of trees were damaged more seriously; Their again sat relative water content of all kinds of tree species submitted downtrend in company with the fall of again sat initial water potential , From this result we can analyze that when the rods dehydrate under initial lose turgot pressure drop after that we take them dehydrations, their again sat relative water content can not revert to initial sat water content.