长江中游农田土壤微量养分空间分布特征

发布时间：2018-11-25 19:40

【摘要】：为了更好地掌握长江中游土壤肥力状况,运用地统计学和Arc GIS技术相结合的方法,对湖北、湖南、江西三省41 943个土壤样品的微量养分(铁Fe、锰Mn、铜Cu、锌Zn、硼B)含量的分布特征和空间变异进行研究。结果表明,长江中游土壤有效态Fe、Mn、Cu、Zn、B的平均含量分别为88.0、27.2、3.05、1.71、0.41 mg kg-1。空间分布特征表现为Fe、Mn均以江汉平原区较低,Zn以湖南省较低,Cu、B空间分布较为不均;与第二次土壤普查结果相比,土壤微量养分含量均有所提高,其中Fe、Mn、Cu含量为缺乏或严重缺乏的面积比例分别降至0.1%、2.2%和0.1%,而Zn和B分别为30.8%和17.7%。不同的土地利用类型、土壤类型和成土母质对土壤微量养分均有不同程度的影响。随着微量养分在农业生产中的贡献越来越突出,亟须根据土壤微量养分的分布特征进行分区管理。
[Abstract]:In order to better understand soil fertility in the middle reaches of the Yangtze River, 41,943 soil samples from Hubei, Hunan and Jiangxi provinces were studied by combining geostatistics with Arc GIS technique. The distribution characteristics and spatial variation of boron B) content were studied. The results showed that the average content of available Fe,Mn,Cu,Zn,B in soil in the middle reaches of the Yangtze River was 88.027.23.05C 1.71g 0.41 mg kg-1., respectively. The spatial distribution of Fe,Mn was lower in Jianghan Plain, lower in Zn in Hunan Province, and uneven in Cu,B. Compared with the results of the second soil census, the content of trace nutrients in the soil increased, and the proportion of Fe,Mn,Cu content in the area lacking or seriously lacking decreased to 0.2% and 0.1%, respectively. Zn and B were 30.8% and 17.7%, respectively. Different land use types, soil types and parent materials had different effects on soil micronutrients. With the increasing contribution of micronutrients in agricultural production, it is urgent to carry out zonal management according to the distribution characteristics of soil micro-nutrients.
【作者单位】：华中农业大学资源与环境学院微量元素研究中心农业部长江中下游耕地保育重点实验室;农业部全国农业技术推广服务中心;
【基金】：农业部耕地质量保护专项(2013135) 国家油菜产业技术体系建设专项(CARS-13) 中央高校基本科研业务费专项(2662015PY135)资助~~
【分类号】：S158

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