延安南泥湾土埝养分含量变化特征统计分析

Statistical analysis on the variation of the nutrient content of the soil in Nanniwan analysis on the variation of the nutrient content of the soil in Nanniwan,Yan'an

延安市南泥湾镇位于黄土台塬地区,该地区由于梯田分布广泛以及治沟造地工程的实施,分布着较多土埝。土埝不但能够起挡土和分割田块的作用,同时兼顾了保水、保土、保肥作用,有利于耕作和灌溉。农民经常通过洗埝来提升农田土壤的养分。研究土埝中养分的分布以及变化特征对提升土壤质量、提高农田质量具有重要意义。本文通过采集不同时间范围、不同朝向、不同高度的土埝样品,运用描述统计分析土埝中土壤养分含量的变化特征,结果表明:土埝的土壤养分含量受到时间、朝向、高度的影响显著。运用多元相关分析与典型相关分析法分析了土壤的理化性质与土壤营养元素间的相关性,结果表明:土埝表层土壤中全氮与有机活性炭存在高度正相关,有效磷和电导率存在较强正相关。

Nanniwan Town,Yan'an City is located in the loess plateau area.Due to the wide distribution of terraces and the implementation of gully control and land reclamation projects,there are a lot of soil in this area.The soil can not only block the soil and divide the fields,but also take into account the preservation of water,soil and fertilizer,which is conducive to farming and irrigation.Farmers often use scrubbing to improve the nutrients of farmland soil,and studying the distribution of nutrients in the soil and its change characteristics are of great significance to improve soil quality and farmland quality.In this paper,by collecting soil samples of different time ranges,different orienta⁃tions and different heights,using descriptive statistics to analyze the change characteristics of soil nutrient content in the soil,the results show that the soil nutrient content of the soil is significantly affected by time,orientation,and height..Multivariate correlation analysis and canonical correlation analysis are used to analyze the correlation be⁃tween soil physical and chemical properties and soil nutrient elements.The results showed that there was a high posi⁃tive correlation between total nitrogen and organic activated carbon,and a strong positive correlation between effective phosphorus and electrical conductivity in the surface soil of the soil.