基于香榧引种区香榧籽无机元素分析的引种试验评价

Evaluation of Introduction Experiment Based on Analysis of Inorganic Elements in Torreya Grandis Seeds in Introduction Area

【目的】评价贵州引种香榧示范提供基础理论支撑。【方法】以贵州引种香榧试验区香榧生长土壤及植株为研究对象,对土壤化学性质、香榧植株不同部位中重金属及微量元素进行检测,评价贵州引种香榧试验区重金属和微量元素的无机元素品质,探讨香榧籽中重金属及微量元素的影响因素。【结果】土壤pH平均值为6.80,土壤有机质含量平均值为31.09 g/kg,土壤全氮平均值为1.70 g/kg,土壤全钾平均值为17.84 g/kg,土壤全磷平均值为0.91 g/kg,土壤碱解氮平均值为127.14 mg/kg,土壤有效磷平均值为91.45 mg/kg,土壤速效钾平均值为475.50 mg/kg,土壤肥力高。香榧籽中重金属Hg、As、Cr、Cd及Pb的含量均最小,符合《绿色食品——烘炒食品》标准。香榧籽中Ni、Cu、Zn、Se、Fe、Mn和Ca含量分别为1.608、10.644、27.124、0.053、46.19、12.58和3400 mg/kg,属于高钙、富铁,含硒坚果。土壤碱解氮与香榧籽Cd、香榧籽中Cd和叶片中Cd之间呈极显著正相关,香榧籽中Cd和杆中Cd之间为显著正相关。【结论】从无机元素分析来看,贵州引种香榧试验区的香榧籽属于绿色、安全、高钙、富铁且含硒坚果。

【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 3400 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.