›› 2017, Vol. 29 ›› Issue (11): 1844-1853.DOI: 10.3969/j.issn.1004-1524.2017.11.10

• Horticultural Science • Previous Articles     Next Articles

Evaluation of nutrient status in site soil of ancient tea trees in Huaxi on principal component analysis

SONG Qinfei1, 2, NIU Suzhen1, 2, CHEN Zhengwu3, YIN Jie1, 2, *, ZHOU Shaojun4, CEN Chunjiao1   

  1. 1.College of Tea, Guizhou University, Guiyang 550025, China;
    2.Tea Engineering and Technology Research Center of Guizhou, Guiyang 550025, China;
    3.Guizhou Tea Research Institute, Guiyang 550006, China;
    4.Institute of Product Quality Inspection & Testing of Zunyi, Zunyi 563000,China
  • Received:2017-06-06 Online:2017-11-20 Published:2017-12-05

Abstract: This study was conducted to investigate soil nutrient status of ancient tea trees in Huaxi, Guizhou Province, and to provide the basic data for protection and rational utilization of ancient tea trees. Thirty-seven site soil samples were collected from Qiantao, Maling, Jiuan and Gaopo. The pH value, organic matter(OM), total nitrogen(TN), available nitrogen(AN), total phosphorus(TP), available phosphorus(AP), available potassium(AK), exchangeable calcium(ECa), exchangeable aluminum (EAl)and available manganese(AMn) and the relationship between them were measured and analyzed. Then the method of principal component analysis was used to estimate the status of soil fertility by means of estimating IFI. The results showed that the pH value, contents of exchangeable calcium and effective aluminum of site soil was suitable for ancient tea tree growth,the contents of soil organic matter, available nitrogen and available potassium were sufficient. But the content of total nitrogen, total phosphorus and available phosphorus were very low in 59.45%, 91.89% and 86.49% side soil, respectively. Available manganese changed greatly, only 40.54% side soil contained suitable available manganese for ancient tea tree. Soil integrated fertility index (IFI) was 19.23. According to the value of IFI, side soil with fertility at middle grade accounted for 64.86%, so the soil fertility quality of side soil belonged to the middle level in general. The best nutrient status of side soil came from Malin, then Jiuan and Gaopo, the side soil from Qiantao was the worst, which suggested that soil fertility management should focus on increasing the content of phosphorus and nitrogen.

Key words: Huaxi, ancient tea trees, soil nutrient, principal component analysis

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