影响石榴品质的地球化学因素——以石家庄市元氏县变质岩山区为例

GEOCHEMICAL FACTORS AFFECTING THE QUALITY OF POMEGRANATE AS EXEMPLIFIED BY METAMORPHIC ROCK AREA OF YUANSHI,SHIJIAZHUANG,HEBEI PROVINCE

本文依据1∶20万化探资料,对石家庄市元氏县石榴种植区岩石、土壤元素地球化学特征进行了分析,探讨了石榴品质与地球化学因素之间的关系。结果表明:土壤元素地球化学特征和石榴品质有着密切的关系,在1∶20万化探图中,P、Zn、Mg、Fe、Cu、Na等元素的高低与石榴品质的空间分布具有很好的吻合性,品质较好的石榴主要分布在黑云斜长片麻岩和浅变质砂砾岩区,其母岩及土壤中植物营养元素P、K、Mg、Fe、Mn、Zn、B、S、Mo有效态含量都较其它类型母岩及土壤中元素有效态含量高,研究认为,在地貌及水热条件、土壤结构等条件具备的前提下,母岩及土壤中植物营养元素的高低是决定石榴品质的最重要的因素之一,1∶20万化探资料可以做为种植优质石榴科学布局的依据。

Based on the 1： 200000 geochemical data and the geochemical characteristics of rocks and soil this paper analyzes the relationship between pomegranate quality and geochemical factor. It is concluded that the pomegranate quality and the element geochemical characteristics of soil have close realationships. On the 1：200000 geochemical map the area rich in P, Zn, Mg, Fe, Cu, Na and so on tally with the pomegranate in good quality. The pomegranate in good quality are principally distributed in biotite-plagioclase gneiss and epi-metamorphic glutinite areas where the available plant nutritional elements, such as P, K, Mg, Fe, Mn, Zn, B, S and Mo, in the bedrock and soil are more than in other bedrock and soil. The reseach indicates that the content of plant nutritional elements in rock and soil is one of the most important fator to decide the quality of pomegranate when the landform condition, hydrothermal condition and soil composition condition attain. 1：200000 geochemical data can be an evidence of planting so as to optimize distribution of agricultural products.