大荔县范家镇盐碱地土壤还原性物质毒害分析  

Analysis of Reducing Substance Toxicity of Saline Soil in Fanjia Town of Dali County

作　　者：闫波 YAN Bo(Shaanxi Provincial Land Engineering Construction Group Limited Company Xi′an,Shaanxi 710075;Institute of Land Engineering and Technology,Shaanxi Provincial Land Engineering Construction Group Limited Company Xi′an,Shaanxi 710075;Key Laboratory of Degraded and Unused Land Consolidation Engineering,the Ministry of Land and Resources,Xi′an,Shaanxi 710075;Shaanxi Provincial Land Consolidation Engineering Technology Research Center,Xi′an,Shaanxi 710075)

机构地区：[1]陕西省土地工程建设集团有限责任公司,陕西西安710075 [2]陕西地建土地工程技术研究院有限责任公司,陕西西安710075 [3]国土资源部退化及未利用土地整治重点实验室,陕西西安710075 [4]陕西省土地整治工程技术研究中心,陕西西安710075

出　　处：《黑龙江农业科学》2017年第9期33-36,共4页Heilongjiang Agricultural Sciences

基　　金：陕西省重点科技创新团队计划资助项目(2016KCT-23);陕西省土地工程建设集团集团内部资助项目(DJNY2017-17)

摘　　要：为合理开发利用盐碱地、提高粮食品质,以大荔县范家镇盐碱地为例,将田块分为F1、F2两部分,分别采集0~30cm土壤并测定分析其理化性质,根据水稻长势将育苗期内水稻分为长势正常、未萌发2类,分别采集育苗期苗盘土壤,分析秧苗生长发育的障碍性因子。结果表明:盐碱地土壤为碱性,有机质、速效钾含量处于丰富水平以上,全氮、有效磷含量处于缺乏水平;盐碱地Fe2+、Mn2+含量处于毒害水平,部分地块还原性硫化物处于有害水平;秧苗长势正常的苗盘土壤电导率、全盐、硫化物含量显著低于秧苗未萌发的苗盘土壤,秧苗未萌发的苗盘土壤电导率、全盐、硫化物含量分别是秧苗长势正常的苗盘土壤的2.68、2.28和2.52倍,盐分、硫化物过高是抑制水稻正常生长发育的重要因素。In order to exploit and utilize saline land reasonably and improve the quality of grain,take the saline soil of Fanjia town of Dali county as an example,the field was divided into two parts:F1,F2,soil samples from0~30cm were collected and their physicochemical properties were determined.According to the growth of rice,the rice in seedling stage could be divided into2categories:normal growth and no germination,the soil of seedling tray was collected,and the obstacle factors of seedling growth were analyzed.The results showed that the saline alkali soil was alkaline,content of organic matter,available potassium was rich level,content of total nitrogen,available phosphorus was in the lack;Fe2+,Mn2+content of saline alkali soil was the level of toxicity,some plots of reduced sulfur was harmful level;conductivity and content of total salt,sulfur in soil with normal seedling were significantly lower than that of non germinated seedling soil,conductivity and content of total salt and sulfide seedling tray soil with non germinated seedling were tray2.68,2.28and2.52times of that of soil with normal seedling,therefore high salinity and sulfide was an important factor to inhibit the normal growth and development of rice.

关 键 词：还原性物质 硫化物 水稻 毒害作用 

分 类 号：S156.4[农业科学—土壤学]