【摘要】 本文旨在分析土地整理中新增耕地土壤养分含量特征,明确影响新增耕地生产力的主要因素。通过采集陕西省2015年陕北、关中、陕南地区整理后的101个新增耕地土壤样品,测定其pH值、有机质、全氮、有效磷和速效钾含量,分析土壤养分状况。通过与全国第二次土壤普查养分分级标准比较,表明新增耕地土壤养分含量较低。陕西省新增耕地土壤养分含量陕北、关中地区受原土地利用类型影响较大,陕南地区土壤养分差异主要由同区域内地块间随机变化引起;经检验,新增耕地土壤中各养分间相关性较低。土壤有机质含量低是导致肥力较低的主要原因,后期利用应通过有机-无机肥的合理配施和测土配方施肥技术的应用、推广秸秆还田技术,最终实现新增耕地的稳产、高产。更多还原

【Abstract】 The objective of this study is to analyze the characteristics of nutrients content in the soil of the newly-increased farmland in the process of land consolidation and find out the factors that affect land productivity.101 soil samples from the newly-increased farmland converted from the Shan-bei region,Guan-zhong region and Shan-nan region were collected in the land consolidation project in 2015 of Shaanxi.The content of pH,soil organic matter,total N,available P and available K were measured and the characteristics of nutrient content were analyzed.Compared with the national second-level soil census nutrient grading standards,it shows that the soil content of newly cultivated land is lower.The original land use types do affect the soil nutrients content of newly-increased farmland in Shan-bei and Guang-zhong region,however,soil nutrients content change in Shan-nan region is mainly caused by random variation between blocks within the same region.After testing,the correlation between nutrients in newly cultivated soil is low.The low soil organic matter content is the main reason for the low fertility.In order to realize the productivity of newly-increased farmland stable and high yield,the later application should be done through the rational application of organic-inorganic fertilizer and the application of soil testing and formula fertilization technology and the promotion of straw returning technology.更多还原