农作物秸杆中钾元素的回收与利用
农作物,,钾素；秸杆；回收,1我国农村作物秸杆的数量、分布与特点,2主要种类秸杆钾元素含量调查[2-7],4秸杆浸提液中提取硝酸钾的原则性工艺流程,5秸杆利用中还
Low_Selenium Characterization of Cervical CancerHOU Shao_fan，WANG Wu_yi，LI Hai_rong
(Institute of Geographical Sciences and Natural Resources Research，Chinese
Academy of Sciences，Beijing 100101，China)
Abstract:Cervical cancer is one of malignant tumors harm to women health. The recent studies indicates that trace elements not only take part in normal metabolism of human body， but also closely relate to tumors generation， development and prognosis， and the relation between low selenium and cervical cancer is paid more attention to. A review with 24 references is given on the research results of relations between low selenium and cervical cancer and other factors in recent years， which would provide information for disclosing the geo_epidemiological characters， physiological，biochemical changes and nosogenesis and prevention of cervical cancer.
Key words:cervical cancer；selenium；antioxidant
摘要：土壤钾素亏缺严重限制了我国农业生产的发展，现有钾资源已经不能满足我国农业需要，目前钾资源的开发主要集中在海水和钾矿，而农作物秸杆作为我国的富钾资源，其利用效率和质量都不尽人意，对秸杆的利用大多还停留在田间焚烧、直接还田以及用作牲畜饲料等传统途径，其利用率还不足40%，秸杆的进一步开发应该引起足够的重视。
关键词：钾素；秸杆；回收 ......
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