富硒产品研究和发展现状

RESEARCH STATUS AND DEVELOPMENT OF SELENIUM RICH PRODUCTS

中国境内只有少数几个地区(湖北恩施、陕西紫阳等)的土壤中的硒含量丰富,可以生产出富硒食品,但数量极为有限,且不能量化,远远不能满足全国72%以上缺硒人口的需求。目前市场上打出富硒的牌子的食品已经数不胜数,多数停留在概念炒作。也有采用叶面喷施,生产富硒食品,但由于科技含量低、施用量大、次数多(一般要喷施三次),受自然因素影响大(8小时内下雨要重喷),大部分的硒元素随水流入江、河、湖、海,造成极大的环境污染,使用富硒肥料必须解决硒的流失与植物吸收这难题。在饲料中添加硒,可以经动物转化贮存在动物体内,但无机硒动物是被动吸收,进入血液后立即排出体外。而有机硒可被动物主动吸收,并能在体内形成稳定的储备。

In China, only a few areas （ Enshi of Hubei and Ziyang of Shanxi） are rich in selenium, which can produce rich selenium-enriched food, but the quantity is very limited and can not be quantified, which can not satisfy more than72% population who demand for selenium deficiency. Currently, there are so many kinds of se- lenium rich products or germanium rich products has been numerous, but a lots of them still stay in the concept of speculation. There are also foliar spraying, the production of selenium-rich / germanium food. But due to the low content of science and technology, the amount of application, the number of times （ generally to spray three times）, affected by natural factors （8 hours to rain heavy spray）, the majority of selenium with water into the river, , Resulting in great environmental pollution. The use of selenium-rich / germanium fertilizers must ad- dress the problem of selenium loss and plant uptake. In the feed added selenium, can be stored in animals by animal transformation. But the inorganic selenium animal is passive absorption, into the blood immediately after excreted. The organic selenium can be active absorption of animals, and can form a stable reserve in the body.