珍稀濒危保护植物蒙古扁桃的生长特性研究

通过连续9 a定株观测方法,研究了蒙古扁桃物候期对应气候因子指标、年株高变化、地径生长、冠幅变化及根系变化规律,结果表明:物候期与气温、地表温度、地温(15 cm)、空气湿度和水汽压等因子关系密切,而与蒸腾量和日照时数关系较疏;年株高变化符合直线方程:y=18.91 8x-0.780 6(R2=0.991 5);年地径变化符合直线方程:y=0.275 6x 0.348 6(R2=0.999 2);年冠幅变化符合指数方程:y=50.371e0.2527x(R2=0.989 9);根系纵向和横向生长趋势分别符合指数函数方程:y=12.914e0.7358x(R2=0.971 5)和y=17.126e0.6918x(R2=0.965 4),但纵向生长落后于横向生长,即侧根生长优于主根。

Growth Characteristics of Endangered Amygdalus mongolica

This paper,through observation of fixed plants for 9 years,studied the relevant climatic factor indices during the phenophase of Amygdalus mongolica,as well as the changes of its yearly height,yearly width,yearly crown size and root system.The research results showed the phenophase of Amygdalus mongolica was closely related to air temperature,soil surface temperature,soil temperature(within 15 cm layer),air humidity and vapor pressure,while less related to transpiration and daily sunlight.The changes of yearly height can be indicated with linear equation:y=18.918x-0.780 6(R2=0.991 5).The changes of yearly width were consistent with the linear equation:y=0.2756x 0.348 6(R2=0.999 2).The changes of yearly crown size were consistent with the exponential equation,y=50.371e0.2527x(R2=0.989 9).The tendencies of longitudinal growth and cross growth of the root system were expressed with the exponential equations,respectively,y=12.914e0.7358x(R2=0.971 5) and y=17.126e0.6918x(R2=0.965 4).However,the longitudinal growth was slower than the cross growth.