黄淮海旱作区农田耕层土壤结构特征与其影响因素  

Characteristics and Influencing Factors of Topsoil Structure of Farmland in Dry Farming Region of HuangHuaiHai

作　　者：李勇 赵云泽 勾宇轩 于茹月 黄元仿 LI Yong;ZHAO Yunze;GOU Yuxuan;YU Ruyue;HUANG Yuanfang(College of Land Science and Technology,China Agricultural University,Beijing 100193,China;Key Laboratory of Agricultural Land Quality and Monitoring,Ministry of Natural Resources,Beijing 100193,China)

机构地区：[1]中国农业大学土地科学与技术学院,北京100193 [2]自然资源部农用地质量与监控重点实验室,北京100193

出　　处：《农业机械学报》2022年第3期321-330,共10页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2016YFD0300801)。

摘　　要：为探究黄淮海旱作区农田耕层结构特征,基于土壤穿透阻力数据,运用地统计学、MannKendall突变检验法等方法,识别了旱作区农田压实层的位置及厚度,并探究了压实层和耕作层的空间变异特征及其影响因素。结果表明:土壤容重、含水率和土壤质地是穿透阻力的主要影响因素。和表层土壤相比,深层土壤穿透阻力更易受含水率和土壤质地的影响。黄淮海旱作区存在不同厚度的压实层。压实层较厚区域主要集中在安徽省北部旱作区,平均厚度为12.38 cm,且其平均土壤穿透阻力为1704.88 kPa;耕作层较厚区域主要集中在河南省,平均厚度为19.31 cm,其平均土壤穿透阻力仅为1218.41 kPa。除自然因素外,农业机械耕作是影响土壤压实层和耕作层厚度与穿透阻力的重要因素。高农业机械总动力区域呈现“耕作层较薄,压实层较厚,穿透阻力大”的特点。In order to explore the structure characteristics of topsoil in dry farming region of HuangHuaiHai,geostatistics and MannKendall test methods were used to identify the position and thickness of plough layer and compacted layer in the dry farming region based on the data of soil penetration resistance,and the spatial variation characteristics and influencing factors of the plough layer and compacted layer were explored.The results showed that soil bulk density,water content and soil texture were the main influencing factors of penetration resistance.Compared with topsoil,penetration resistance of deeper soil was more affected by water content and organic matter content.There was a compacted layer in the soil profile in the study areas and the spatial variability of the compacted layer was heterogeneous.The area of thicker compacted layer was mainly concentrated in the northern of Anhui Province,with an average thickness of 12.38 cm,and Henan Province had a relatively thick tillage layer,with an average thickness of 19.31 cm.In addition to natural factors,agricultural mechanical tillage was an important factor affecting the thickness and penetration resistance of soil compacted layer and plough layer.The high total power area of agricultural machinery presented the characteristics of thinner tillage layer,thicker compaction layer and larger penetration resistance.

关 键 词：土壤穿透阻力 压实层 耕作层 黄淮海旱作区 

分 类 号：S158.5[农业科学—土壤学]