海口市农用地土壤硒含量与土壤理化性质的相关性研究  

Soil Selenium Contents in Relation to Soil Physicochemical Properties in Agricultural Land of Haikou

作　　者：李福燕 李许明 LI Fu-yan;LI Xu-ming(College ol Biology and Bromatology ol Guanyxi Normal University for Nationalities,Chopgzuo,Guanyxi 539200)

机构地区：[1]广西民族师范学院生物与食品工程学院,广西崇左532200

出　　处：《安徽农业科学》2020年第14期42-47,52,共7页Journal of Anhui Agricultural Sciences

基　　金：广西民族师范学院科研经费资助项目(2019BS001);科技基础性工作和社会公益研究专项(2004DIB3J073)。

摘　　要：采集海口市23个乡镇和4个农场的751个农用地土壤耕作层(0~25 cm)样品,研究分析了土壤有机质含量、pH、全氮、全磷、全钾和全硒含量,并对土壤中全硒含量和土壤理化性质相关性进行了分析。结果表明:海口市农用地土壤有机质含量总体上处于中上水平,全省有机质平均含量为27.79 g/kg,各地区之间含量差异较大,最大值为最小值的29.22倍;土壤pH平均为5.40,为酸性土壤;土壤全氮平均含量为1.72 g/kg,大部分地区氮含量属于中等偏上水平;土壤全磷含量的平均值为0.94 g/kg,磷含量地区间差异较大;土壤全钾平均含量为2.06 g/kg,全市土壤钾含量偏低,88%以上土壤处于中下水平;所调查土壤硒含量从痕量到2.23 mg/kg,平均值为0.35 mg/kg,明显高于全省平均值0.211 mg/kg,45.54%的土壤硒含量处于中等及以上水平(0.175 mg/kg),其中29.29%属于高硒含量,但各个乡镇硒含量差异较大。从相关性分析可知,土壤硒含量与pH、全磷和全钾呈极显著或显著正相关,与有机质和全氮呈负相关,表明土壤中硒主要来源于土壤母质。Total of 751 samples were collected from the arable land(0-20 cm)in the 23 towns and 4 farmlands of Haikou City,soil organic matter(SOM),pH,total nitrogen(TN),total phosphorus(TP),total potassium(TK)and Se contents of those samples were analyzed.Then the correlations between Se content and soil physicochemical properties were established.The result showed that all of the soil samples from the arable land were acidic,with a pH value of 5.40.The SOM content of the arable land in Haikou City was above average level,the mean value of which was 27.79 g/kg,a relatively large range was showed in different regions,the ratio between the maximum and minimum value could be up to 29.22.The mean value of TN content was 1.72 g/kg,most samples were above average level.The TP content had a large variance,with a mean value of 0.94 g/kg.The mean TK content was 2.06 g/kg,88%of which were in the low level.The Se content ranging from trace amounts to 2.23 mg/kg,and the mean value was 0.35 mg/kg,which was significantly higher than the average value(0.211 mg/kg)of total province.About 45.54%of the total samples were higher than 0.175 mg/kg,and 29.29%of which were enriched with Se.However,the variability was great between the towns.The correlation analysis indicated that the Se content had significant and positive relation with the pH,TP and TK,and the negative correlation was existed between Se content and SOM and TN content,which suggested that the Se was mainly come from the parent material.

关 键 词：海口 硒 理化性质 含量 相关性 

分 类 号：S153[农业科学—土壤学]