不同调控措施在强酸性高硒茶园土壤中的应用研究

Application of Different Adjustment Measures in Highly Acidic Se-rich Soil in Tea Garden

通过田间试验,研究了生物肥和粉煤灰、秸秆干馏液配合施用共4种不同调控措施对强酸性高硒茶园土壤上茶叶硒含量、土壤理化性质和土壤硒有效性的影响。结果表明,4种调控措施不同程度地提高了土壤中有效硒含量和茶叶硒含量,由高到低依次为:生物肥处理>粉煤灰-秸秆干馏液-生物肥复合处理>粉煤灰-生物肥复合处理>秸秆干馏液-生物肥复合处理;对土壤pH值提高幅度的大小次序为:粉煤灰-秸秆干馏液-生物肥复合处理>粉煤灰-生物肥复合处理>生物肥处理>秸秆干馏液-生物肥复合处理;另外,4种不同措施对改善酸化茶园土壤其他理化性质也呈现不同效果,其中秸秆干馏液-生物肥复合处理的综合效果较差。研究结果对于江苏高硒地区土壤中硒素的有效利用和加快发展富硒茶产业具有实际的参考价值和重要的指导意义。

A field experiment was carried out to study the effects of 4 adjustment measures to the quality of highly acidic Se-rich soil of tea garden. The adjustment was achieved by the application of amendments made up from the following components： biological fertilizer, fly ash, and straw dry distillation liquid results showed that all of the 4 adjustment measures improved the available Se content in soil as well as the Se content in tea leaves. The order of the effectiveness was biological fertilizerfly ash-straw dry distillation liquid-biological fertilizer fly ash-biological fertilizerstraw dry distillation liquid-biological fertilizer. Application of these amendments also improved the pH of the soil that had been acidified due to tea tree culture. The order was fly ash-straw dry distillation liquid-biological fertilizerfly ash-biological fertilizerbiological fertilizerstraw dry distillation liquid-biological fertilizer. The effects of the amendments on the overall soil quality of the tea garden varied. Straw dry distillation liquid-biological fertilizer had the least positive effect. Results of this research provide a reference to take the advantage of Se-rich soil in Jiangsu and the development of Se-rich tea industry.