远源引种樟子松对荒漠区气候及土壤盐碱离子适应性分析

A Adaptability Analysis on Far Distance Species Source Introduction of Pinus sylvestris Var mongolica to Arid Desert Climate and Salinization Soil

本文通过对远源樟子松在民勤沙区栽培后 ,其生长同当地气候及土壤盐碱离子的灰色关联分析研究 ,认为樟子松生长 ,与当地的日照时数、平均气压、蒸发量、地温、空气湿度、降水量、风速等气象因素关系较为密切 ,是影响樟子松的主要因素 ,而同最大风速因子关系较差 ,是影响樟子松的次要因素。通过樟子松成活率同土壤中的盐碱离子的关联度分析 ,认为土壤 p H值和 HCO3 -离子对樟子松的成活率有大的影响 ,是影响樟子松幼苗成活率的主导因子 ;SO42 -、Mg2 +、Ca2 +、K++ Na+等离子同樟子松成活率关系也很密切 ,Cl-和全盐量同樟子松幼苗成活率关联度较小 。

Seedlings of Pinus sylvestris Var mongolica were introduced to Minqin arid desert from remote semi-arid area, the growth condition matching with local climate and soil ions is researched by grey correlation analysis. It shows that the growth has close relationship with local sunshine hours, average air pressure, evaporation, soil temperature, air humidity and precipitation, are the main factors affecting its growth wind velocity is the second one. Another analysis on seedlings' survival ratio with soil ions shows that soil pH value and HCO 3 - have a big influence on seedlings' survival, and SO 4 2- ?Mg 2+ ?Ca 2+ ?K ++Na + in the soil also have close relation to the seedling life. However, Cl - and total salty content are second factors.