Abstract:
In September and October during 2019, soil samples of 0-20 cm and 20-40 cm were collected at 19 Torreya grandis ‘Merrillii’standsin Zhuji, Keqiao, Shengzhou, Dongyang and Pan’an, where were the major production area of Zhejiang province. Determinations were implemented in the same year of collection on content of soil nutrients and heavy metal. The results showed that the average soil organic matter content was 33.76g/kg, meaning that 94.73% of the samples were above the medium level. The contents of hydrolyzable N and available P in the soil were rich,with 89.47% and 94.73% at level 1. The mean available K content was 159.52 mg/kg, and the variable coefficient was 57.10%. The average pH value of the soil was 4.75, and 36.84% of the samples were strongly acidic (<4.5). Medium and trace elements showed moderate variation. According to NY/T 391-2013, the content of heavy metals among the samples was within the limit except that of As and Cd. Comparison was made on the results of 2019 and that by Dai Wen-sheng in 2003 in the same stands. It showed that soil physical and chemical properties were improved, especially content of available P, organic matter and available K. Content of Mo, Se and B increased. However K element content of 5.27% samples was at a very low level. The content of Ca decreased by 47.69%, and soil pH decreased by 0.78.