Knowledge gaps in organic research: understanding interactions of cover crops and tillage for weed control and soil health
Tóm tắt
Organic crop systems rely on tillage as the primary means to control weeds, but negative impacts of tillage may prevent farmers from achieving the potential soil health benefits of organic management. Cover crops have been suggested as a solution for overcoming this tillage trade-off directly by enhancing soil health and indirectly by providing weed control, thus reducing the need for tillage. In order to characterize the state of published research on the effects of cover crops on weed control and soil health in organic crop systems, we conducted a formal literature search on this topic and identified 116 relevant studies which were subsequently categorized by research focus, management strategy, and variables measured. We found 83 studies examined effects of cover crops on weed control and 33 studies examined effects of cover crops on soil health, but only 10 of the studies reported on both weed control and soil health effects. The lack of integrated studies examining both weed control and soil health responses to management highlights a research gap not sufficiently addressed by researchers, even though it is a topic of great interest to many organic farmers. A majority of studies (79) included reduced or no-till treatments, and annual grasses, clover, and vetch species were the most common cover crops. Assessments of aboveground biomass were the most common weed control measurements, while soil organic matter was the most common soil health measurement. Recommendations for future research needs include the following: more integrated assessments of the effects of cover crops on both soil health and weed control under varying tillage regimes; greater effort to characterize the soil health impacts of cover crop systems utilizing newly developed soil health indicators including soil physical parameters; long-term studies to assess dynamic soil health responses as well as perennial weed pressure (particularly in reduced and no-till organic systems); and greater allocation of research funding to regions outside of North America and Europe.
Tài liệu tham khảo
Altieri MA, Lana MA, Bittencourt HV, Kieling AS, Comin JJ, Lovato PE (2011) Enhancing crop productivity via weed suppression in organic no-till cropping systems in Santa Catarina, Brazil. J Sustain Agric 35:855–869
Anugroho F, Kitou M, Nagumo F, Kinjo K, Tokashiki Y (2009) Effect of the sowing date on the growth of hairy vetch (Vicia villosa) as a cover crop influenced the weed biomass and soil chemical properties in a subtropical region. Weed Biol Manage 9:129–136
Armengot L, Berner A, Blanco-Moreno JM, Mäder P, Sans FX (2015) Long-term feasibility of reduced tillage in organic farming. Agron Sustain Dev 35:339–346
Baldivieso-Freitas P, Blanco-Moreno JM, Armengot L, Chamorro L, Romanyà J, Sans FX (2018) Crop yield, weed infestation and soil fertility responses to contrasted ploughing intensity and manure additions in a Mediterranean organic crop rotation. Soil Tillage Res 180:10–20
Bavougian CM, Sarno E, Knezevic S, Shapiro CA (2019) Cover crop species and termination method effects on organic maize and soybean. Biol Agric Hort 35:1–20
Beach HM, Laing KW, Van de Walle M, Martin RC (2018) The current state and future directions of organic no-till farming with cover crops in Canada, with case study support. Sustain 10:373
Blanco-Cacqui H, Shaver TM, Lindquist JL, Shapiro CA, Elmore RW, Francis CA, Hergert GW (2015) Cover crops and ecosystem services: insights from studies in temperate soils. Agron J 107:2449–2474
Blesh J (2018) Functional traits in cover crop mixtures: biological nitrogen fixation and multifunctionality. J Appl Ecol 55:38–48
Bowman G (2002) Steel in the field: a farmer’s guide to weed management tools. Sustainable Agriculture Network, Beltsville MD
Brennan EB, Acosta-Martinez V (2017) Cover cropping frequency is the main driver of soil microbial changes during six years of organic vegetable production. Soil Biol Biochem 109:188–204
Bulan MTS, Stoltenberg DE, Posner JL (2015) Buckwheat species as summer cover crops for weed suppression in no-tillage vegetable cropping systems. Weed science 63:690–702.Carr PM, Anderson RL, Lawley YE, Miller PR, Zwinger SF (2012) organic zero-till in the northern US Great Plains region: opportunities and obstacles. Renew Agric Food Syst 27:12–20
Carr PM, Anderson RL, Lawley YE, Miller PR, Zwinger SF (2012) Organic zero-till in the northern US Great Plains Region: Opportunities and obstacles. Renew Agric Food Syst 27(1):12–20
Carr PM, Winch TJ, Martin GB, Horsley RD, Gunderson JJ (2013) Weed growth and crop performance following hairy vetch, rye, and wheat cover crops in a cool semiarid region. Org Agric 3:149–161
Casagrande M, Peigné J, Payet V, Mäder P, Sans FX, Blanco-Moreno JM, Antichi D, Bàrberi P, Beeckman A, Bigongiali F, Cooper J, Dierauer H, Gacoyne K, Grosse M, Heß J, Kranzler A, Luik A, Peetsman E, Surböck A, Willekens K, David C (2015) Organic farmers’ motivations and challenges for adoption conservation agriculture in Europe. Org Agric 6:281–295
Cooper J, Baranski M, Stewart G, Nobel-de Lange M, Bàrberi P, Fließbach A, Peigné J, Berner A, Brock C, Casagrande M, Crowley O, David C, De Vliegher A, Döring TF, Dupont A, Entz M, Grosse M, Haase T, Halde C, Hammerl V, Huiting H, Leithold G, Messmer M, Schloter M, Sukkel W, van der Heijden MGA, Willekens K, Wittwer R, Mäder P (2016) Shallow non-inversion tillage in organic farming maintains crop yields and increases soil C stocks: a meta-analysis. Agron Sustainable Development 36:22
Crowley KA, Van Es HM, Gómez MI, Ryan MR (2018) Trade-offs in cereal rye management strategies prior to organically managed soybean. Agron J 110:1492–1504
Daryanto S, Fu B, Wang L, Jacinthe PA, Zhao W (2018) Quantitative synthesis on the ecosystem services of cover crops. Earth-Sci Rev 185:357–373
Delate K, Cwach D, Chase C (2012) Organic no-tillage system effects on soybean, corn and irrigated tomato production and economic performance in Iowa, USA. Renew Agric Food Syst 27(1):49–59
Dupont ST, Ferris H, Van Horn M (2009) Effects of cover crop quality and quantity on nematode-based soil food webs and nutrient cycling. Appl Soil Ecol 41:157–167
Fernandez AL, Scheaffer CC, Wyse DL, Staley C, Gould TJ, Sadowsky MJ (2016) Associations between soil bacterial community structure and nutrient cycling functions in long-term organic farm soils following cover crop and organic fertilizer amendment. Sci Total Environ 566-567:949–959
Ferris H, Bongers T, de Goede RGM (2001) A framework for soil food web diagnostics: extension of the nematode faunal analysis concept. Appl Soil Ecol 18:13–29
Finney DM, Kaye JP (2016) Functional diversity in cover crop polycultures increases multifunctionality of an agricultural system. J Appl Ecol 54:509–517
Finney DM, Creamer NG, Schultheis JR, Wagger MG, Brownie C (2009) Sorghum sudangrass as a summer cover and hay crop for organic fall cabbage production. Renew Agric Food Syst 24(3):225–233
Finney DM, Eckert SE, Kaye JP (2015) Drivers of nitrogen dynamics in ecologically based agriculture revealed by long-term, high-frequency field measurements. Ecol Appl 25(8):2210–2227
Gallandt E (2006) How can we target the weed seedbank? Weed Sci 54(3):588–596
Germeier CU (2006) Competitive and soil fertility effects of forbs and legumes as companion plants or living mulch in wide spaced organically grown cereals. Biol Agric Hort 23(4):325–350
Hiltbrunner J, Scherrer C, Streit B, Jeanneret P, Zihlmann U, Tschachtli R (2008) Long-term weed community dynamics in Swiss organic and intergrated farming systems. Weed Res 48:360–369
Holmes AA, Thompson AA, Wortman SE (2017) Species-Specific Contributions to Productivity and Weed Suppression in Cover Crop Mixtures. Agron J 109(6):2808–2819
Hurisso TT, Moebius-Clune DJ, Culman SW, Moebius-Clune BN, Thies JE, van Es HM (2018a) Soil protein as a rapid soil health indicator of potentially available organic nitrogen. Agric Environ Letters 3
Hurisso TT, Culman SW, Zhao K (2018b) Repeatability and spatiotemporal variability of emerging soil health indicators relative to routine soil nutrient tests. Soil Sci Soc Am J 82:939–348
Ito T, Araki M, Komatsuzaki M, Kaneko N, Ohta H (2015) Soil nematode community structure affected by tillage systems and cover crop managements in organic soybean production. Appl Soil Ecol 86:137–147
Jenkins D, Ory J (2016) 2016 national organic research agenda. Organic Farming Research Foundation, Santa Cruz CA
Jouzi Z, Azadi H, Taheri F, Zarafshani K, Gebrehiwot K, Van Passel S, Lebailly P (2017) Organic farming and small-scale farmers: main opportunities and challenges. Ecol Econ 132:144–154
Lehman RM, Cambardella CA, Stott DE, Acosta-Martinez V, Manter DK, Buyer JS, Maul JE, Smith JL, Collins HP, Halvorson JJ, Kremer RJ, Lundgren JG, Ducey TF, Jin VL, Karlen DL (2015) Understanding and enhancing soil biological health: the solution for reversing soil degradation. Sustain 7:988–1027
Liang S, Grossman J, Shi W (2014) Soil microbial responses to winter legume cover crop management during organic transition. Euro J Soil Biol 65:15–22
Lounsbury NP, Weil RR (2015) No-till seeded spinach after winterkilled cover crops in an organic production system. Renew Agric Food Syst 30:473–485
Lowry CJ, Brainard DC (2017) Organic farmer perceptions of reduced tillage: a Michigan farmer survey. Renew Agric Food Syst 34:103–115
Mäder P, Berner A (2012) Development of reduced tillage systems in organic farming in Europe. Renew Agric Food Syst 27:7–11
Mirsky SB, Gallandt ER, Mortensen DA, Curran WS, Shumway DL (2010) Reducing the germinable weed seedbank with soil disturbance and cover crops. Weed Res 50:341–352
Mirsky SB, Ryan MR, Teasdale JR, Wells WMS, Keene CL, Moyer JW (2013) Overcoming weed management challenges in cover-crop-based organic rotational no-till soybean production in the eastern United States. Weed Tech 27:193–203
Morrow JG, Huggins DR, Carpenter-Boggs LA, Reganold JP (2016) Evaluating measures to assess soil health in long-term agroecosystem trials. Soil Sci Soc Am J 80:450–462
Ngouaijio M, McGriffin ME, Hutchinson CM (2003) Effect of cover crop and management system on weed populations in lettuce. Crop Prot 22:57–64
Njeru EM, Avio L, Sbrana C, Turrini A, Bocci G, Barberi P, Giovannetti M (2014) First evidence for a major cover crop effect on arbuscular mycorrhizal fungi and organic maize growth. Agron Sustain Dev 34:841–848
O’Connell S, Grossman JM, Hoyt GD, Shi W, Bowen S, Marticorena DC, Fager KL, Creamer NG (2015) A survey of cover crop practices and perceptions of sustainable farmers in North Carolina and the surrounding region. Renew Agric Food Syst 30:550–562
Orloff N, Mangold J, Miller Z, Menalled F (2018) A meta-analysis of field bindweed (Convulvus arvensis L.) and Canada thistle (Cirsium Arvense L.) management in organic agricultural systems. Agric Ecosyst Environ 254:264–272
Osipitan OA, Dille JA, Assefa Y, Knezevic SZ (2018) Cover crop for early season weed suppression in crops: systematic review and meta-analysis. Agron J 110:2211–2221
Osipitan OA, Dille JA, Assefa Y, Radicetti E, Ayeni A, Knezevic SZ (2019) Impact of cover crop management on level of weed suppression: a meta-analysis. Crop Sci 59:833–842
Peigné J, Ball BC, Roger-Estrade J, David C (2007) Is conservation tillage suitable for organic farming? A review. Soil Use Manag 23:129–144
Poeplau C, Don A (2015) Carbon sequestration in agricultural soils via cultivation of cover crops - a meta-analysis. Agric Ecosyst Environ 200:33–41
Ranaldo M, Carlesi S, Costanzo A, Barberi P (2019) Functional diversity of cover crop mixtures enhances biomass yield and weed suppression in a Mediterranean agroecosystem. Weed Res 60:96–108
Reberg-Horton SC, Grossman JM, Kornecki TS, Meijer AD, Price AJ, Place GT, Webster TM (2012) Utilizing cover crop mulches to reduce tillage in organic systems in the southeastern USA. Renew Agric Food Syst 27:41–48
Romaneckas K, Adamaviciene A, Eimutyte E, Pupaliene R, Sarauksis E, Marks M, Kimbirauskiene R, Čekanauskas S (2018) Impact of non-chemical weed control methods on the soil and sugar beet root chemical composition. J Elementol 23:1215–1227
Sandén T, Spiegel H, Stüger HP, Schlatter N, Haslmayr HP, Zavattaro L, Grignani C, Bechini L, D’Hose T, Molendijk L, Pecio A, Jarosz Z, Guzman G, Vanderlinden K, Giraldez JV, Mallast J, ten Berge H (2018) European long-term field experiments: knowledge gained about alternative management practices. Soil Use Manag 34:167–176
Sarrantonio M, Gallandt E (2003) The role of cover crops in north American cropping systems. J Crop Prod 8:53–74
Schoenbock M, Jerkins D, Ory J (2017) Soil health and organic farming: practical conservation tillage. Organic Farming Research Foundation, Santa Cruz CA
Silva EM (2014) Screening five fall-sown cover crops for use in organic no-till crop production in the upper Midwest. Agroecol Sustain Food Syst 38:748–763
Smith RG, Ryan MR, Menalled FD (2011) Direct and indirect impacts of weed management practices on soil quality. In: Hatfield J, Sauer T (eds) Soil Management. American Society of Agronomy and Soil Science Society of America, Madison WI
Soil Health Insititue (2020) North American project to evaluate soil health measurements. https://soilhealthinstitute.org/north-american-project-to-evaluate-soil-health-measurements/ accessed 5/7/2020
Te Pas CM, Rees RM (2014) Analysis of differences in productivity, profitability and soil fertility between organic and conventional cropping systems in the tropics and sub-tropics. J Integr Agric 13:2299–2310
Tiemann LK, Grandy AS, Atkinson EE, Marin-Spiotta E, McDaniel MD (2015) Crop rotational diversity enhance belowground communities and functions in an agroecosystem. Ecol Lett 18:761–771
Topp GC, Reynolds WD, Cook FJ, Kirby JM, Carter MR (1997) Physical attributes of soil quality. In: Gregorich EG, Carter MR (eds) Soil Quality for Crop Production and Ecosystem Health, Vol. 25. Elsevier, New York
Tribouillois H, Fort F, Cruz P, Charles R, Flores O, Garnier E, Justes E (2015) A Funtional characterisation of a wide range of cover crop species: growth and nitrogen acquisition rates, leaf traits and ecological strategies. PLoS One 10:e0122156
Trinchera A, Ciaccia C, Testani E, Baratella V, Campanelli G, Leteo F, Canali S (2019) Mycorrhiza-mediated interference between cover crop and weed in organic winter cereal agroecosystems: the mycorrhizal colonization intensity indicator. Ecol Evol
Tully K, Sullivan C, Weil R, Sanchez P (2015) The state of soil degradation in sub-Saharan Africa: baselines, trajectories, and solutions. Sustain 7:6523–6552
Verret V, Gardarin A, Pelzer E, Mediene S, Makowski D, Valantin-Morison M (2017) Can legume companion plants control weeds without decreasing crop yield? A meta-analysis. Field Crops Res 91:159–160
Vincent-Caboud L, Peigné J, Casagrande M, Silva EM (2017) Overview of organic cover crop-based no-tillage technique in Europe: farmers’ practices and research challenges. Agric 7:42
Wagger MG, Cabrera ML, Ranells NN (1998) Nitrogen and carbon cycling in relation to cover crop residue quality. J Soil Water Cons 53:214–218
Wang KH, McSorley R, Gallaher RN, Kokalis-Burelle N (2008) Cover crops and organic mulches for nematode, weed and plant health management. Nematology 10:231–242
Welch RY, Behnke GD, Davis AS, Masiunas J, Villamil MB (2016) using cover crops in headlands of organic grain farms: effects on soil properties, weeds and crop yields. Agric Ecosyst Environ 216:322–332
Wortman SE, Drijber RA, Francis CA, Lindquist JL (2013) Arable weeds, cover crops, and tillage drive soil microbial community composition in organic cropping systems. Appl Soil Ecol 72:232–241
Zikeli S, Gruber S (2017) Reduced tillage and no-till in organic farming systems, Germany-status quo, potentials and challenges. Agric 7:35
Zwickle S, Wilson R, Bessette D, Herms C, Doohan D (2016) Facilitating ecological weed management decisions by assessing risk-benefit tradeoffs. Agroecol Sustain Food Syst 40:635–659