土壤-小麦食物链硒转移模式及其应用

应用生态学报 ›› 1990, Vol. 1 ›› Issue (3): 231-236.

土壤-小麦食物链硒转移模式及其应用

李书鼎¹, 张少兰²

1. 中国科学院沈阳应用生态研究所, 沈阳 110015;
2. 沈阳市环境监测中心站, 沈阳 110015

收稿日期:1989-10-27 出版日期:1990-07-25 发布日期:1990-07-25

Transferring model of Se in soil-wheat food chain and its application

Li Shuding¹, Zhang Shaolan²

1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015;
2. Shenyang Monitoring Centre of Environment, Shenyang 110015

Received:1989-10-27 Online:1990-07-25 Published:1990-07-25

摘要/Abstract

摘要： 利用⁷⁵Se为示踪剂, 研究了土壤-小麦系统中Se的迁移和分布规律。土壤Se植物可利用系数SA=0.3—1.9, 土壤不同, SA值也不同。土壤固液两相中Se的分配系数Kd=141—395, 说明土壤对Se有强烈的吸附作用, Kd大小顺序为:暗棕色森林土>黑土>草甸棕壤。小麦对土壤Se的浓集系数CF=0.09—0.14, 小麦不是浓集Se的作物;Se在小麦各器官间CF值>1, 表明其在小麦体内运转比较容易。作者提出了一个食物链Se转移模式, 评价了土壤有效Se水平, 指出草甸棕壤有效Se充足, 黑土和暗棕色森林土则不足。估算了病区每人每天摄Se量为26.6μg, 远低于我国成人安全摄Se量建议值40—240μg/人·日的下限值。

关键词: 土壤-小麦系统, 示踪试验, Se转移模式, 食物链

Abstract: Transferring and distribution patterns of Se in soil-wheat system were studied using Setracer. Available coefficient of soil Se by wheat (SA) is 0.3—1.9, it varied with soil types. Distribution coefficient of soil Se in solid and liquid phases (Kd) is 141—395. it is shown that Se is adsorbed strongly by soil. The order of Kd is Dark brown forest soil>Black soil>Meadow burozem. Concentration coefficient of soil Se for wheat is 0.09—0.14. It is demonstrated that wheat does not belong to the crops which can concentrated Selenium. Selenium is easily transferred in various organs of wheat , its CF value is more than1. Transferring model of Se in soil-wheat food chain was put forward by au thors, and level of soil available Se was avaluated . The results show that available Se is sufficient in brown burozem, but insufficient in black soil and dark brown forest soil. The amount of Se absorbed by per capita per day is 26.6 g in the disease area , which is far less than the recommended value of 40—240 g in China.

Key words: Soil-wheat system, Tracer experiment, Tranferring model of Se, Food chain

李书鼎, 张少兰. 土壤-小麦食物链硒转移模式及其应用[J]. 应用生态学报, 1990, 1(3): 231-236.

Li Shuding, Zhang Shaolan. Transferring model of Se in soil-wheat food chain and its application[J]. Chinese Journal of Applied Ecology, 1990, 1(3): 231-236.

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