NDLI: Establishment and Growth of Self-Seeded Winter Cereal Cover Crops in a Soybean-Corn Rotation

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Establishment and Growth of Self-Seeded Winter Cereal Cover Crops in a Soybean-Corn Rotation

Content Provider	Semantic Scholar
Author	McDonald, Paul B. Singer, Jeremy W. Wiedenhoeft, Mary H.
Copyright Year	2008
Abstract	Perpetuating cereal cover crops through self-seeding may increase adoption by reducing risk and cost. Winter rye (Secale cereale L.), wheat (Triticum aestivum L.), and triticale (× Triticosecale Wittmack) were used to develop self-seeding cover crop systems in a soybean [Glycine max (L.) Merr.]-corn (Zea mays L.) rotation. Cereals were planted and managed chemically and mechanically in varying configurations. The objectives were to (i) quantify temporal establishment patterns after one cycle of self-seeding, (ii) quantify shoot biomass, N uptake, and seed production growing concurrently with corn, and (iii) quantify cover crop establishment after two cycles of self-seeding. Final plant densities for most species by treatment combinations were fully established within 1 wk after soybean (Cycle 1) harvest. Fall green ground cover after soybean was consistently higher with wheat and ranged from 16 to 61%. Straw biomass the following July ranged from 50.4 to 79.1 g m -2 in wheat, 20.1 to 39.3 g m -2 in triticale, and 0.0 to 52.7 g m -2 in rye. Combined spring and maturity maximum N uptake was 20.7,21.2, and 35.0 kg ha -1 for triticale, wheat, and rye. Cycle two cover crop seed production was greatest in wheat and ranged from 559 to 1280 seeds m -2 . Wheat also consistently had greater self-seeding plant establishment after two cycles than rye and triticale, which ranged from 5 to 21% of the original plant densities and 19 to 64% of the cycle one plant densities. Future research on self-seeding cereal cover crops should focus on efficient technologies for seed dispersal.
Starting Page	432
Ending Page	439
Page Count	8
File Format	PDF HTM / HTML
DOI	10.2134/agronj2007.0141
Volume Number	100
Alternate Webpage(s)	https://naldc.nal.usda.gov/download/17559/PDF
Alternate Webpage(s)	https://doi.org/10.2134/agronj2007.0141
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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