兰州白兰瓜产区的土壤地球化学环境特征

The Characters of Soil Geochemistry in Lanzhou Honeydew Melon Garden

研究结果表明，兰州白兰瓜产区的土壤地球化学环境具有：1）有机质的含量低，积累速度慢；2）元素的横向迁移速度不显著，没有显著的规律，垂向迁移比较显著，而且，不同使用年限的砂田，元素迁移的速度不同，一般新砂田最快，中砂四元素淋虑速度显著降低，老砂田又有所回升；3）不同元素的正向迁移规律和速度，在不同使用年限的砂田上表现不同；4）富硅、富铝。

The results showed that the characters of soil geochemistry in Lanzhou honeydew melon garden as fellow: 1) The amount of organic material is low, the accumulation rate of the organic material is low as well; 2) Lateral migration of elements is not obvious and has ilo rElies, but the perpendicular migration of elements is abvious. Different aged-type of sandsoil has different migration rate. Generally, the rew sandsoil has the highest migration speed of elements, and the elements migration rate decrease in the adult sandsoil apparently, while it increase ill old sandsoil; 3) Different elenents have different migration rate, 4) There are a great amount of AL and Si.