Structural changes and degradation of Red Latosols under different management systems for 20 years

Author:

Tavares Filho João1,Melo Thadeu Rodrigues de1,Machado Wesley1,Maciel Bruno Vieira1

Affiliation:

1. State University of Londrina, Brazil

Abstract

Soils are the foundation of terrestrial ecosystems and their role in food production is fundamental, although physical degradation has been observed in recent years, caused by different cultural practices that modify structures and consequently the functioning of soils. The objective of this study was to evaluate possible structural changes and degradation in an Oxisol under different managements for 20 years: no-tillage cultivation with and without crop rotation, perennial crop and conventional tillage, plus a forested area (reference). Initially, the crop profile was described and subsequently, 10 samples per management system and forest soil were collected to quantify soil organic matter, flocculation degree, bulk density, and macroporosity. The results indicated structural changes down to a soil depth of 50 cm, with predominance of structural units ∆μ (intermediate compaction level) under perennial crop and no-tillage crop rotation, and of structural units ∆ (compacted) under conventional tillage and no-tillage. The soil was increasingly degraded in the increasing order: forest => no-tillage crop rotation => perennial crop => no-tillage without crop rotation => conventional tillage. In all managements, the values of organic matter and macroporosity were always below and bulk density always above those of the reference area (forest) and, under no-tillage crop rotation and perennial crop, the flocculation degree was proportionally equal to that of the reference area.

Publisher

FapUNIFESP (SciELO)

Subject

Soil Science,Agronomy and Crop Science

Reference38 articles.

1. Qualidade de um solo sob diferentes usos e sob cerrado nativo;ARAÚJO R.;R. Bras. Ci. Solo,2007

2. Partículas coloidais, dispersão e agregação em Latossolos;AZEVEDO A.C.;Ci. Rural,2004

3. Soil physical properties and sugarcane root growth in a Red Oxisol;BAQUERO J.E.;R. Bras. Ci. Solo,2012

4. Melhoria da agregação do solo através do sistema plantio direto;CALEGARI A.;Semina: Ci. Agron.,2006

5. Influence of soil management and crop rotation on physical properties in a long-term experiment in Paraná, Brazil;CALEGARI A.;Commun. Soil Sci. Plant Anal.,2013

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3