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为了明确如东县土壤有效硼含量丰缺的状况,以指导硼肥的施用,对该县土壤有效硼作了分析研究。通过分析测定,全县土壤(0—20cm表土)有效硼平均含量(x±s)为0.401±0.186ppm,属缺硼的范围。该县土壤有效硼含量存在着地域分异现象,按各土壤类型之间有效硼平均量的差异达0.05显著水平。全县可分为潮盐土棉花潜在缺硼区,灰湖土中度缺硼区和水稻土严重缺硼区。造成各区有效硼含量不同的原因有成土母质类型、开垦利用时间和灌溉排水状况,其中灌溉排水是最活跃的因素。根据对如东县有效硼的研究,可以认为江苏省淮南沿海很多地方应注意土壤硼素供给不足的问题。
In order to clarify the status of abundance and deficiency of available boron in soils in Rudong County and to guide the application of boron fertilizer, the available boron in soils of the county was analyzed. Through analysis and determination, the average content of available boron in the soil (0-20cm topsoil) in the county is (x ± s) 0.401 ± 0.186ppm, which belongs to the range of boron deficiency. The available boron content of the soil in this county has the phenomenon of geographical differentiation. The difference of the average effective boron content among soil types reaches 0.05 significant level. The county can be divided into tide salt soil potential boron deficiency area, gray lake soil boron deficiency area and a serious lack of boron paddy area. The causes of the different effective boron content in each district are the types of soil parent material, the time of reclamation and utilization and the status of irrigation and drainage, of which irrigation drainage is the most active factor. According to the study of available boron in Rudong County, it can be considered that many places in Huainan, Jiangsu Province should pay attention to the problem of insufficient supply of boron in soil.