摘要
以赣州市主要农作物954组水稻及根系土为研究对象,分析了水稻及根系土中硒的含量特征,并研究了赣州市富硒土壤界限值。结果表明,水稻籽实总体富硒概率为53.77%,其中当根系土Se含量≥0.4 mg/kg时,水稻籽实的富硒比率高达79.78%。但是在研究区足硒、潜在硒不足和缺硒的土壤中,也发现有一定数量的富硒水稻,说明以0.4 mg/kg为界限划分富硒土壤存在一定的漏判和误判。通过水稻富硒率对比发现,赣州市水稻种植区富硒土壤标准下限值为0.3 mg/kg,此时水稻籽实Se平均含量为0.073 mg/kg,水稻富硒率为72.16%。研究结果对赣州市富硒土壤资源的科学利用和富硒水稻产业的发展具有重要意义。
In our project,954 groups of rice and root soil,the main crops of Ganzhou city,were taken as a research object to analyze the selenium contents of rice and rhizosphere,and to study the threshold value of selenium-rich soil in Ganzhou city.The results revealed that when the Se content of rhizosphere was≥0.4 mg/kg,the overall selenium enrichment probability of rice seeds was 53.77%,and the selenium enrichment ratio of rice seeds was as high as 79.78%.However,a certain amount of selenium-rich rice also grew in the soil with sufficient selenium,potential deficient selenium and deficient selenium,which indicates that there were certain misjudgment and erroneou judgment in the division of the selenium-rich soil according to the threshold of 0.4 mg/kg.According to the comparison of Se enrichment rate of rice,when the standard lower limit of Se-rich soil in the rice growing area of Ganzhou City was 0.3 mg/kg,the average Se content in rice seeds was 0.073 mg/kg,and the Se enrichment rate in rice was 72.16%.This study is of great significance to the scientific utilization of selenium-rich soil resources and the development of selenium-rich rice industry in Ganzhou City.
作者
周墨
唐志敏
张明
陈国光
梁晓红
湛龙
张洁
雍太健
ZHOU Mo;TANG Zhimin;ZHANG Ming;CHEN Guoguang;LIANG Xiaohong;ZHAN Long;ZHANG Jie;YONG Taijian(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China)
出处
《地质通报》
CAS
CSCD
北大核心
2021年第4期604-609,共6页
Geological Bulletin of China
基金
中国地质调查局项目《全国土地质量地球化学调查成果集成与服用应用(南京地质调查中心)》(编号:DD20190519)和《海峡西岸经济区土地质量地球化学调查》(编号:DD20160321)
关键词
土壤硒含量
水稻硒含量
富硒标准
回归分析
soil selenium
rice selenium
selenium enrichment standard
regression analysis
