辽宁植烟土壤锌、硼丰缺指标确立及丰缺程度分析

Establishment of Critical Zinc and Boron Nutrient Levels in Tobacco Growing Soils and Their Evaluation of Deficiencies and Excesses in Liaoning Province

为了科学施用微量元素锌、硼肥,平衡烟株营养,提高烟草的产量和品质,通过采样分析与田间小区试验相结合的研究方法,确立辽宁省建平县植烟土壤锌、硼的丰缺指标体系,并借此分析该县植烟土壤锌、硼丰缺程度。结果表明:土壤有效锌的丰缺指标:<0.42mg.kg-1为缺乏,0.42～0.51mg.kg-1为低等,0.52～0.61mg.kg-1为中等,>0.61mg.kg-1为丰富;土壤有效硼的丰缺指标:<0.46mg.kg-1为缺乏,0.46～0.51mg.kg-1为低等,0.52～0.62mg.kg-1为中等,>0.62mg.kg-1为丰富。建平县有效锌总体平均含量处于丰富水平,但各乡镇的差异较大,白山乡土壤有效锌含量均达丰富水平,其他乡镇均有烟田处在低等水平,而且八家农场、太平庄乡有部分烟田土壤有效锌缺乏;该县的有效硼总体平均含量处在低等水平,除白山乡外其他各乡镇均有不同程度的缺硼,北二十家子镇、八家农场、马场镇较严重。

In order to supply zinc and boron micronutrients to tobacco fields, balance nutrition of tobacco plant and improve the output and quality of tobacco, the abundance and deficiency index of soil available zinc and boron in tobacco growing soils of Jianping county was established through the methods of extensively sampling in country-level tobacco-growing areas and field plot experiment. Based on the established abundance and deficiency index, an evaluation on the condition of abundance or deficiency of soil available zinc and boron in Jianping County was made. The results indicated that soil available zinc 〈0.42mg·kg^-1 deficient, 0.42-0.51 mg·kg^-1low degree, 0.52-0.61 mg·kg^-1 middle degree, 〉 0,61 mg·kg^-1 abundant; soil available boron： 〈0.46 mg·kg^-1 deficient, 0.46-0.51 mg·kg^-1 low degree, 0.52-0.62 mg·kg^-1middle degree, 〉0.62 mg·kg^-1 abundant. According to established abundance and deficiency index to analyze and evaluate the status of soil in Jianping County, it was found that the average content of soil available zinc was in abundant level, but there was great difference in different villages and towns. Soil available zinc of Baishan Town were all in abundant level, but there were some tobacco fields of the other towns in low level, and some tobacco fields of Bajianongchang Town and Taipinzhuang Town were in deficient level. The average content of soil available boron in the county was in low level, and there was great proportion of the soil in low and deficient level except Baishan Town, especially in Beiershijiazi Town, Bajianongcbang Town and Machang Town.