保护措施对亚祖-密西西比三角洲旱作玉米产量、沟水入渗和表层密封壤土土壤湿度的影响

IF 2.4 3区 农林科学 Q2 SOIL SCIENCE Soil Science Society of America Journal Pub Date : 2023-09-20 DOI:10.1002/saj2.20595
Jacob P. Rix, Tsz Him Lo, Drew M. Gholson, G. Dave Spencer, Gurbir Singh
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引用次数: 0

摘要

几十年的密集耕作造成了美国中南部及其他地区壤土表面密封的问题。这些土壤有机质含量低,土壤团聚体稳定性差,最终入渗率低,从而降低了雨养作物的生产力,增加了灌溉用水需求。本研究量化了土壤管理措施对美国密西西比州斯通维尔附近的玉米(Zea mays L.)产量、沟水入渗和土壤湿度的影响。6个处理包括常规耕作(CT)、谷物黑麦(CR);玉米秸秆、沟垦(FD)、免耕(NT)、聚丙烯酰胺(PAM)和沉土(SS)。在这两年中,没有其他处理的玉米产量显著高于CT对照处理。单环渗透仪结果显示,2022年CT、CR、PAM和SS之间以及2021年CT和NT之间没有显著差异。中子衰减发现,在整个2022年玉米生育期的8个测量日期中,CT、FD和SS之间顶部1 m内的土壤总水分没有显著差异。然而,在生育期后期,土壤湿度数值较低。这些发现表明,环境因素和其他农业操作可能会抵消保护措施,限制它们在减少灌溉需求以缓解密西西比河流域冲积含水层地下水枯竭方面的有效性。这篇文章受版权保护。版权所有
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Effects of conservation practices on rainfed maize yield, furrow water infiltration, and soil moisture for surface sealing loam soils in the Yazoo‐Mississippi Delta
Abstract Decades of intense tillage have created the problem of surface sealing in loam soils across the Mid‐South USA and beyond. These soils exhibit low organic matter, poor soil aggregate stability, and ultimately low infiltration rates that decrease rainfed crop productivity and increase irrigation water demand. This research quantified the effects of soil management practices on rainfed maize ( Zea mays L.) yield, furrow water infiltration, and soil moisture in Commerce very fine sandy loam and silt loam near Stoneville, Mississippi, USA. The six treatments included conventional tillage (CT), cereal rye (CR; Secale cereale ), furrow diking (FD), no‐till (NT), polyacrylamide (PAM), and subsoiling (SS). No other treatment achieved a significantly higher maize grain yield than the CT control treatment in both years consistently. Single‐ring infiltrometer results indicated no significant differences between CT, CR, PAM, and SS in 2022 and between CT and NT in 2021. Neutron attenuation found that total soil water within the top 1 m was not significantly different among CT, FD, and SS on any of the eight measurement dates throughout the 2022 maize reproductive period. However, soil moisture was numerically lower for FD in the late reproductive stages. These findings suggest that environmental factors and other agronomic operations may counteract conservation practices, limiting their effectiveness at reducing irrigation requirements to mitigate groundwater depletion in the Mississippi River Valley Alluvial Aquifer. This article is protected by copyright. All rights reserved
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来源期刊
Soil Science Society of America Journal
Soil Science Society of America Journal 农林科学-土壤科学
CiteScore
5.40
自引率
3.40%
发文量
130
审稿时长
3.6 months
期刊介绍: SSSA Journal publishes content on soil physics; hydrology; soil chemistry; soil biology; soil biochemistry; soil fertility; plant nutrition; pedology; soil and water conservation and management; forest, range, and wildland soils; soil and plant analysis; soil mineralogy, wetland soils. The audience is researchers, students, soil scientists, hydrologists, pedologist, geologists, agronomists, arborists, ecologists, engineers, certified practitioners, soil microbiologists, and environmentalists. The journal publishes original research, issue papers, reviews, notes, comments and letters to the editor, and book reviews. Invitational papers may be published in the journal if accepted by the editorial board.
期刊最新文献
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