<p>Cover cropping is
an effective management practice for reducing nitrogen (N) losses to the
environment from agriculture fields in the Midwest. Cereal rye (CR; <i>Secale
cereale L</i>.) and hairy vetch (HV; <i>Vicia villosa Roth</i>) are two of the
most common cover crop species grown in the region. However, limited cover crop
adoption in the region is partly due to a dearth of knowledge addressing the
effect of cover crops on nitrogen cycling and grain production within corn and
soybean conservation cropping systems. The
following studies were designed to address knowledge gaps in the current
literature regarding the rate, quantity, and timing of cover crop residue C and
N release; the fate of CR N following termination; and the effects of cover
crops specifically on soybean growth, N assimilation, and yield. Data
from this study revealed that growers should be aware that cover crop nutrient
release may result in a “tug-of-war” between the soil microbiome and cash crops
for soil inorganic-N. Additionally, we observed that CR N is used minimally by
the subsequent crop; thus, growers should value CR N as a long-term benefit,
such as building SOM. Finally, we found that added pressure from CR during
early soybean growth may reduce soybean resilience, and in a wet year result in
yield loss.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/16816660 |
| Date | 15 October 2021 |
| Creators | Corey G Lacey (11568049) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/COVER_CROP_IMPACTS_ON_NITROGEN_CYCLING_AND_GRAIN_PRODUCTION_WITHIN_CORN_AND_SOYBEAN_CONSERVATION_CROPPING_SYSTEMS/16816660 |
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