Evaluation of Introduction Experiment Based on Analysis of Inorganic Elements in Torreya Grandis Seeds in Introduction Area
- ZHANG Jiachun, ZHOU Qing, SUN Nan, LONG Chengchang, REN Shaohua, ZHOU Xinwei, ZHANG Chiqiang, WANG Chen
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【Objective】 This study aims to provide theoretical support for the evaluation of the demonstration effect of Torreya grandis introduced into Guizhou. 【Method】 The soil and plants of Torreya grandis in Guizhou were used as study objectives,and the chemical properties of soil,heavy metals and trace elements in different parts of Torreya grandis plant were detected,and the inorganic element quality of heavy metals and trace elements in the experimental area of Torreya grandis introduced into Guizhou was evaluated,the influencing factors of heavy metals and trace elements in Torreya grandis seeds were discussed. 【Result】 The average values of soil pH,soil organic matter, soil total nitrogen, soil total potassium, soil total phosphorus, soil alkali hydrolyzable nitrogen, soil available phosphorus, and soil available potassium were 6.80,31.09 g/kg,1.70 g/kg,17.84 g/kg,0.91 g/kg,127.14 mg/kg,91.45 mg/kg and 475.50 mg/kg, respectively. These results suggested that the soil fertility was high. The contents of Hg,As,Cr,Cd and Pb in Torreya grandis seeds were the lowest,which met the standard of "green food-fried food". The contents of Ni,Cu,Zn,Se,Fe,Mn and Ca in Torreya grandis seeds were 1.608 mg/kg,10.644 mg/kg,27.124 mg/kg,0.053 mg/kg,46.19 mg/kg,12.58 mg/kg and 3 400 mg/kg, respectively,which were high in calcium,iron and selenium. There was a significant and positive correlation between soil available N and Cd in Torreya grandis seed,between Cd in seeds and leaves of Torreya grandis,and a significant positive correlation between Cd in Torreya grandis seed and in stem. 【Conclusion】 Based on the analysis of inorganic elements,this study finds that the seeds of Torreya grandis in Guizhou are green,safe,high in calcium,rich in iron and selenium.