基于主成分分析的花溪古茶树立地土壤养分评价

发布时间：2018-03-26 17:19

本文选题：花溪　切入点：古茶树　出处：《浙江农业学报》2017年11期

【摘要】：为明确贵州花溪古茶树土壤养分状况,为古茶树的保护和合理开发利用提供参考,对黔陶、马铃、久安、高坡等花溪古茶树集中分布区37份立地土壤进行理化检测,分析其养分含量间的相关性,并采用主成分分析法对土壤养分状况进行综合评价。结果表明,花溪古茶树立地土壤p H值均值为4.77,总体处于适宜状态;土壤有机质、碱解氮、速效钾含量较为丰富;但59.45%的土壤全氮含量极低,91.89%和86.49%的土壤全磷和有效磷含量极低,处于缺磷状态;大部分土壤交换性钙、交换性铝含量均处于茶树生长适宜范围;花溪古茶树土壤有效锰变异范围较大,仅有40.54%的土壤有效锰处于适宜范围。主成分分析表明,花溪古茶树立地土壤IFI值在8.11~32.89,均值为19.23,属于中等以上肥力的土壤占到64.86%,土壤肥力质量总体水平属于良好。其中马铃土壤养分状况最好,其次是久安和高坡,黔陶古茶树土壤养分状况最差。对花溪古茶树应重点增施氮磷肥。
[Abstract]:To clear the soil nutrient status of Huaxi ancient tea tree in Guizhou, to provide reference for the protection of the ancient tea and rational development and utilization of Guizhou pottery, potato, long, high Huaxi ancient tea concentrated distribution area of 37 soil physical and chemical detection, correlation analysis between the nutrient content, and analysis to comprehensive evaluation the soil nutrient status by using principal components. The results show that the Huaxi ancient tea set soil P H mean value is 4.77, the overall in the appropriate state; soil organic matter, available nitrogen, available potassium content is rich; but soil total nitrogen content of 59.45% is very low, very low content of total phosphorus and available phosphorus in 91.89% and 86.49% of the soil that phosphorus was deficient; most of the soil exchangeable calcium, exchangeable Al content in tea growing suitable range; Huaxi ancient tea tree in a large range of variation of soil available manganese, soil available manganese is only 40.54% in the appropriate range of principal component. The analysis shows that, Huaxi ancient tea set soil IFI value in 8.11~32.89, mean value is 19.23, which is more than moderate soil fertility accounted for 64.86%, the overall level of soil fertility quality is good. The soil nutrient status of potato is best, followed by a long and steep slope, the soil nutrient status of ancient Tea Tao Qian of Huaxi ancient tea is the worst. The tree should be the focus of nitrogenous fertilizer and phosphate fertilizer.

【作者单位】：贵州大学茶学院;贵州大学茶叶工程技术研究中心;贵州省茶叶研究所;遵义市产品质量检验检测院;
【基金】：国家自然科学基金(31560222) 贵州省科研机构服务企业行动计划项目黔科合服企([2014]4008号) 贵州省教育厅自然科学研究项目[(2014)2995号] 贵州大学引进人才科研项目[贵大人基合字(2014)19号]
【分类号】：S158;S571.1

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