应用生态学报2025，Vol.36Issue(12)：3699-3708,10.DOI:10.13287/j.1001-9332.202512.019
不同改土措施对白浆土耕作特性的影响
Effects of different improvement measures on tillage characteristics of albic soil
摘要
Abstract
The poor tillage properties in low-yielding albic soil caused by physical structural obstacles are unfavor-able for mechanical tillage operations.To address this problem,we conducted indoor simulation experiments with three types of treatments:tillage layer mixing(TLM,where 10％-50％of the albic soil was incorporated into the surface soil),subsoil mixing(SM,where 10％-50％of the illuvial soil was incorporated into the albic soil),and subsoil fertilization(SF,with gradients of 2％-10％organic fertilizer,straw,and biochar addition,respectively).We analyzed the differential regulatory mechanisms of various soil improvement measures on the plasticity(indica-ted by liquid limit,plastic limit,and plasticity index),swelling-shrinkage behavior(indicated by shrinkage lim-it),and optimal tillage period(indicated by shrinkage index)of albic soil.Results showed that TLM improved soil homogeneity and plasticity,shortened the optimal tillage period,and degraded tillage characteristics.SM improved the tillage performance of albic soil by increasing clay content and optimizing the sand-clay ratio,which together ex-tended the optimal tillage period.SF,leveraging the synergistic effects of organic matter,specific surface area,maximum hygroscopic water,and organic carbon,demonstrated superior improvement effects on tillage characteris-tics compared to TLM and SM.Among these,organic fertilizer enhanced soil water retention capacity(plastic limit increased by 37.5％-58.1％),optimizing soil tillage characteristics.Straw exhibited the most significant regulatory effect on soil swelling-shrinkage behavior(shrinkage limit decreased by up to 41.1％),with the optimal effect achieved at a 6％straw addition.Biochar improved soil tillability by optimizing the hierarchical pore structure,where a 10％addition increased the liquid limit and plastic limit by 7.3％and 14.9％,respectively,while reducing the plasticity index by 7.6％and increasing the shrinkage index by 12.6％.These findings indicated that all three soil fertilization materials could improve the tillage characteristics of low-yielding albic soil.This study would pro-vide theoretical support for the remediation of albic soil barriers and the construction of sustainable tillage systems.关键词
耕层混拌/心土混层/心土培肥/白浆土/耕作特性Key words
tillage layer mixing/subsoil mixing/subsoil fertilization/albic soil/tillage characteristics引用本文复制引用
陈爱慧,张海滨,王秋菊,于晓波,谭增鑫,周魏岩,任洪忱,闫景凤..不同改土措施对白浆土耕作特性的影响[J].应用生态学报,2025,36(12):3699-3708,10.基金项目
本文由国家重点研发计划项目(2022YFD1500800)、现代农业省实验室项目(ZY04JD05-002)和黑龙江省农业科技创新跨越工程项目(CX23GG21)资助. （2022YFD1500800）
