辽宁省昌图县典型耕地棕壤有效态微量元素含量评价

目的]为制定适合辽宁省昌图县的施肥方式提供理论依据。方法]结合室外调查和室内分析研究辽宁省昌图县典型耕地棕壤中有效态微量元素的现状。结果]该地区的有效铁、锰、铜和锌的含量变化较大,其中双井子镇的有效锌含量低至（0.29±0.24）mg/kg。该地区有效硼、铁、锰、铜和锌的含量分别为（0.73±0.35）、（28.00±11.90）、（33.96±8.58）、（1.46±0.42）和（1.21±0.59）mg/kg。该地区锌含量的变异度最高,其变异系数达48.81%,锰含量的变异度最低,其变异系数为25.28%。该地区土壤中有效硼和锰的含量较高,73.82%的地区有效硼含量达高量水平,94.55%的地区有效锰含量达高量水平 有效铁和铜的含量较适中 土壤中的有效锌较缺乏,89.93%的地区有效锌含量为缺乏,仅有0.31%的土壤中有效锌含量达高量水平。结论]该地区土壤中有效锌缺乏严重,应多注意补充有效锌肥。

Content Evaluation on the Available Microelements in Typical Cultivated Brown Soil of Changtu County in Liaoning Province

Objective] The aim was to provide theoretical foundation for making the fertilization mode suitable for Changtu county in Liaoning Province.Method] The status quo of available micro elements in typical cultivated brown soil of Changtu county in Liaoning Province was studied by combining outdoor survey and indoor analysis.Result] The content changes of available iron,manganese,copper and zinc were greater in this region and among them,the content of available zinc in Shuangjingzi town was as low as 0.29±0.24 mg/kg.The contents of available boron,iron,manganese,copper and zinc were 0.73±0.35,28.00±11.90,33.96±8.58,1.46±0.42 and 1.21±0.59 mg/kg resp.in this region.In this region,the variation degree of zinc content was highest and its variation coefficient was up to 48.81%;the variation degree of manganese content was lowest and its variation coefficient was 25.28%.The contents of available boron and manganese in soil were higher in this region,the content of available boron in 73.82% of total area in this region and the content of available manganese in 94.55% of total area in this region reached high content level;the contents of available iron and copper were relatively moderate;the available zinc was relatively deficient in soil,the contents of available zinc in 89.93% of total area in this region were deficient and the contents of available zinc in soil reached high content level in only 0.31% of total area in this region.Conclusion] The deficiency of available zinc in soil in this region was serious and the supplement of available zinc should get more attention.