四川茶区土壤营养元素背景值研究

采用单道扫描等离子发射光谱仪(ICP-AES)对四川茶区72个产茶县422个取样点035.cm土层中P、S、K等17种营养元素含量进行测定,分析了该地区茶园土壤的无机营养元素背景值特征。结果表明,四川茶区土壤中P、K、Ca、Mg、S等5种大、中量元素均相对贫乏;微量元素Mn、B、Zn在大部分地区土壤中相对富集,而Fe、Mo在大部分地区土壤相对贫乏;其他元素中Se和Sb相对富集,其浓集系数K值分别为5.45和22.3。方差分析表明,17种营养元素的含量在不同产茶地区土壤中的差异均显著。土壤中营养元素的背景值因土壤类型的不同而表现出一定的差异,其中棕壤中的营养元素含量相对丰富,而红壤中营养元素的含量相对缺乏。因此应有针对性地增施有机肥及微量元素肥料,以补充相对贫乏的营养元素。

Background of nutrition elements in tea garden soils in Sichuan province

The contents of 17 nutritive elements, of soil collected in 0-35 cm surface layer in 72 such as P, S, K, were measured using the ICP-AES for 422 samples counties or sections, Sichuan to study the characters of the background of nutrition elements. The result showed that five elements, P, K, Ca, Mg and S, were relatively deficient in tea garden soil in Sichuan. Micro elements, Mn, B and Zn, were abundant relatively, but Fe,Mo were deficient in most soil. Other elements, such as Se and Sb, were abundant with the enrichment coefficients being 5.45 and 22.3, respectively. The contents of all the nutrition elements in the different areas were significantly different. The background of nutrition ele- ments of varying soil type also showed a determined different. The nutrition elements were relatively abundant in brown soil, and were relatively deficient in red soil. Therefore, rational application of organic fertilizer and the micro elements fertilizers should be involved as the supplements of the deficient elements.