Arid
DOI10.1017/S174217051100041X
Organic zero-till in the northern US Great Plains Region: Opportunities and obstacles
Carr, Patrick M.1; Anderson, Randy L.2; Lawley, Yvonne E.3; Miller, Perry R.4; Zwinger, Steve F.5
通讯作者Carr, Patrick M.
来源期刊RENEWABLE AGRICULTURE AND FOOD SYSTEMS
ISSN1742-1705
EISSN1742-1713
出版年2012
卷号27期号:1页码:12-20
英文摘要

The use of killed cover crop mulch for weed suppression, soil erosion prevention and many other soil and crop benefits has been demonstrated in organic no-till or zero-till farming systems in eastern US regions and in Canada. Implements have been developed to make this system possible by terminating cover crops mechanically with little, if any, soil disturbance. Ongoing research in the US northern Great Plains is being conducted to identify cover crop species and termination methods for use in organic zero-till (OZ) systems that are adapted to the crop rotations and climate of this semi-arid region. Current termination strategies must be improved so that cover crop species are killed consistently and early enough in the growing season so that subsequent cash crops can be grown and harvested successfully. Delaying termination until advanced growth stages improves killing efficacy of cover crops and may provide weed-suppressive mulch for the remainder of the growing season, allowing no-till spring seeding of cash crops during the next growing season. Excessive water use by cover crops, inability of legume cover crops to supply adequate amounts of N for subsequent cash crops and failure of cover crops to suppress perennial weeds are additional obstacles that must be overcome before the use of killed cover crop mulch can be promoted as a weed control alternative to tillage in the US northern Great Plains. Use of vegetative mulch produced by killed cover crops will not be a panacea for the weed control challenges faced by organic growers, but rather one tool along with crop rotation, novel grazing strategies, the judicious use of high-residue cultivation equipment, such as the blade plow, and the use of approved herbicides with systemic activity in some instances, to provide organic farmers with new opportunities to incorporate OZ practices into their cropping systems. Emerging crop rotation designs for organic no-till systems may provide for more efficient use of nutrient and water resources, opportunities for livestock grazing before, during or after cash crop phases and improved integrated weed management strategies on organic farms.


英文关键词organic farming ecological farming conservation tillage no-till roller-crimper cover crops crop rotation
类型Article
语种英语
国家USA ; Canada
收录类别SCI-E
WOS记录号WOS:000300088300004
WOS关键词LEGUME COVER CROPS ; GREEN-MANURE ; SPRING WHEAT ; CROPPING SYSTEMS ; NO-TILL ; FALLOW REPLACEMENT ; GROWTH-STAGES ; DECIMAL CODE ; SOIL QUALITY ; WATER-USE
WOS类目Agriculture, Multidisciplinary
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174821
作者单位1.N Dakota State Univ, Dickinson Res Extens Ctr, Dickinson, ND 58601 USA;
2.ARS, USDA, Brookings, SD 57006 USA;
3.Univ Manitoba, Dept Plant Sci, Winnipeg, MB R3T 2N2, Canada;
4.Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA;
5.N Dakota State Univ, Carrington Res Extens Ctr, Carrington, ND 58421 USA
推荐引用方式
GB/T 7714
Carr, Patrick M.,Anderson, Randy L.,Lawley, Yvonne E.,et al. Organic zero-till in the northern US Great Plains Region: Opportunities and obstacles[J],2012,27(1):12-20.
APA Carr, Patrick M.,Anderson, Randy L.,Lawley, Yvonne E.,Miller, Perry R.,&Zwinger, Steve F..(2012).Organic zero-till in the northern US Great Plains Region: Opportunities and obstacles.RENEWABLE AGRICULTURE AND FOOD SYSTEMS,27(1),12-20.
MLA Carr, Patrick M.,et al."Organic zero-till in the northern US Great Plains Region: Opportunities and obstacles".RENEWABLE AGRICULTURE AND FOOD SYSTEMS 27.1(2012):12-20.
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