不同栽培基质对石山珍稀濒危植物苗期生长的影响

对 6种石山珍稀濒危植物在石灰岩土壤和酸性红壤上的苗期生长状况及体内化学元素含量进行了对比研究 ,结果表明 :(1 )每种植物在 2种土壤上的物候学特征基本一致 ;(2 )小花异裂菊和青檀在石灰岩土壤上生长量比酸性土壤上高 ,海南椴在酸性土壤上生长量比石灰岩土壤上高 ;(3 ) 6种植物体内Ca、B 2种化学元素的含量是石灰岩土上比酸性土上高 ;除小花异裂菊外 ,Al在其它 5种植物中的含量都是酸性土上高于石灰岩土上 ,小花异裂菊则是石灰岩土上高于酸性土上 ;(4 )K、Zn、B的生物吸收系数是石灰岩土高于酸性土 ,而N、P、Ca、Mg、Fe、Al、Mn则是酸性土高于石灰岩土。

Effect of Culture Substrata on Seedlings of Rare and Endangered Plants from Limestone Regions

Growth and contents of chemical elements of 6 r are and endangered species of plants from limestone regions were studied and com pared between different substrates limestone soil and acid red soil.Results show ed that:(1) there was no big difference between the two groups of plants in phen ological characteristics;(2)The growth of Heteroplexis microcephala and Pt eroceltis tatarinowii in limestone soil were higher than in acid soil,but that of Hainania trichosperma was lower;(3) The contents of Ca and B in these 6 species in limestone soil were higher than in acid soil,but the contents of Al i n the plants,except Hainania trichosperma,which was in reverse,were higher i n acid soil;(4)The biological absorption coefficients of K,Zn and B by the plant s in limestone soil were higher than in acid soil,while those of other elements such as N,P,Ca,Mg,Fe,Al and Mn were just on the contrary.