信阳茶区土壤有效态微量元素含量状况

Available trace elements content in soil of Xinyang tea-producing area

中文关键词:  茶园土壤  pH值  有机质  有效态Zn  有效态Cu  有效态Mn  有效态B  有效态Fe

英文关键词:tea garden soil  pH values  organic matter  available Zn  available Cu  available Mn  available B  available Fe

中文摘要:

      目的 对信阳毛尖茶5个主产区茶园土壤pH、有机质和有效态Zn、Cu、Mn、B和Fe的含量进行调查和分析, 为茶园合理施肥提供借鉴。方法 分别采用pH计、元素分析仪和等离子体光电直读光谱仪对土壤的pH、有机质和微量元素的含量进行测定。结果 信阳毛尖茶5个主产区茶园土壤pH值总体偏酸性, 有机质平均含量低于15 g/kg, 且地域差异较大。土壤有效态Zn的平均含量处于中等水平, 空间分布很不均匀。其中, 罗山县和浉河区茶园土壤有效态Zn的含量在中等及中等以上的分别占100%和99.08%, 而光山县和新县茶园仅为15.39%和1.92%。土壤有效态土壤Mn和B的含量极其缺乏, 均低于土壤缺素临界值, 而有效态Fe含量极其丰富。茶园土壤pH 值与有效态的Zn和Fe含量呈极显著负相关性, 与有效态的Cu、Mn 和B的含量呈极显著正相关性; 土壤有机质含量和有效态Zn、Cu和Fe的含量呈正相关, 与有效态Mn和B呈负相关性。结论 信阳毛尖茶茶园需要增施有机肥, 同时还要增施Zn、Cu、Mn和B微肥。

英文摘要:

      Objective To survey and analyze the soil pH values, organic matter contents and contents of available Zn, Cu, Mn, B, and Fe in 5 main producing areas tea gardens of Xinyang Maojian, so as to provide support for scientific and reasonable fertilization. Methods The soil pH value, content of soil organic matter and soil trace elements were detected using pH meter, elemental analyzer and inductively coupled plasma spectrometer, respectively. Results The soil pH value was totally partial acid, and the average content of soil organic matter was lower than 15 g/kg with great regional differences. The average content of available Zn was in medium with heterogeneous spatial distribution. Among them, the contents of soil available Zn in the middle and above accounted for 100% and 99.08% in the tea gardens of Luoshan and Shihe, respectively, while there were only 15.39% and 1.92% in Guangshan and Xinxian. The contents of soil available Mn and B were really lacking, and below their critical value, while the content of soil available Fe was abundant. The soil pH value had negative correlations with available Zn and available Fe, but has positive correlations with available Cu, Mn and B, respectively. The soil organic matter was positively correlated with available Zn, Cu and Fe, but negatively correlated with available Mn and B. Conclusion Therefore, organic fertilizer as well as increasing Zn, Cu, Mn and B micronutrient fertilizer should be applied to increase soil fertility in tea gardens of Xinyang Maojian.