关键词: 野生茶树, 贵州, 土壤养分, 综合评价

Abstract: The soil factors of wild tea distributed in 32 zones were studied to evaluate the physical and chemical indexes of soil and to provide theoretical basis for the protection of wild tea germplasm in Guizhou Province. The results showed that the pH value of 46.9% soil were 4.5-5.5, which were the suitable range. The pH values of 21.9% soil were less than 4.5, which were severely acidified. And the pH values of 31.3% soil ranged from 5.5 to7.0. The contents of the organic matter, total nitrogen, total phosphorus, available nitrogen, available phosphorus and available potassium were 11.01-162.62 g·kg^-1, 0.05-8.13 g·kg^-1, 0.02-4.03 g·kg^-1, 24.81-456.01 mg·kg^-1, 3.89-84.04 mg·kg^-1,27.31-516.67 mg·kg^-1, respectively. The content of microelements in soil was deficient or excessive to some extent. The contents of available nitrogen and phosphorus were higher, while the contents of available potassium were lower. The contents of exchangeable aluminum, exchangeable magnesium, exchangeable calcium, available iron, available copper and available zinc were 0.08-8.80 cmol·kg^-1, 0.18-4.05 mg·kg^-1, 0.86-10.46 mg·kg^-1, 5-142.5 mg·kg^-1, 0.24-9.88 mg·kg^-1, 0.27-12.04 mg·kg^-1, respectively.

Key words: wild tea germplasm, Guizhou, soil nutrient, comprehensive evaluation