论文部分内容阅读
为揭示隆回植烟土壤有机质含量分布特征及其影响因素,提高烤烟生产施肥的科学性,采用传统统计学、相关分析、回归分析以及灰色关联方法分析了隆回植烟土壤有机质含量分布特点及其影响因素。结果表明:1隆回烟区植烟土壤有机质含量平均值为32.22 g/kg,处于“适宜”水平,处于“适宜”范围内的样本占51.0%;24种不同土类之间有机质含量达到极显著差异,有机质含量在“适宜”水平的土壤样本数比例为红壤>石灰岩土>黄壤>水稻土;36种不同土壤质地间有机质含量存在极显著差异,其中轻壤土、砂壤土和中壤土有机质含量处于“适宜”水平的比例较高;4植烟土壤全氮、有效磷和全钾含量偏高,碱解氮含量适宜,全磷和速效钾含量偏低;5影响植烟土壤有机质含量分布的土壤养分因素有土壤氮素、磷素以及钾素,对有机质含量分布影响大小顺序为碱解氮>速效钾>全钾>全磷>有效磷>全氮;6有机质含量随碱解氮、有效磷和速效钾含量的升高而提高,而全氮、全钾和全磷与有机质含量之间呈二次曲线关系。
In order to reveal the distribution characteristics of organic matter content in Longhui tobacco planting soil and its influencing factors, and to improve the scientificity of fertilization in flue-cured tobacco production, the characteristics of soil organic matter distribution in Longhui tobacco-planting soil were analyzed by traditional statistics, correlation analysis, regression analysis and gray relational analysis Its influencing factors. The results showed that: (1) The average content of soil organic matter in tobacco planting area was 32.22 g / kg, which was at “suitable” level and 51.0% in “suitable” range. The soil organic matter Organic matter content reached extremely significant difference. The proportion of soil samples with organic matter content at “suitable ” level was red soil> limestone soil> yellow soil> paddy soil. There were significant differences in organic matter content between 36 different soil textures, of which, Soil organic matter content of loamy soil and mid-loam soil was higher than “suitable”; 4, the content of total nitrogen, available phosphorus and total potassium were higher, nicotine nitrogen content was suitable, and total phosphorus and available potassium were lower; Soil nutrients such as soil nitrogen, phosphorus and potassium affected soil organic matter content distribution in tobacco soil. The order of the effect on soil organic matter content was as follows: total nitrogen> available potassium> total potassium> total phosphorus> available phosphorus> total nitrogen; 6 The content of organic matter increased with the increase of alkaline nitrogen, available phosphorus and available potassium, but quadratic curve of total nitrogen, total potassium, total phosphorus and organic matter content.