Abstract
Nitrogen (N) release from roll-killed legume cover crops was determined for hairy vetch (Vicia villosa Roth), crimson clover (Trifolium incarnatum L.), and a hairy vetch + rye (Secale cereale L.) biculture in an organic corn production system in North Carolina, USA. Cover crops were planted at two locations in fall 2008 and 2009, roll-killed in May, and no-till planted with corn (Zea mays L.). Inorganic soil N and mineral N flux were determined using potassium chloride (KCl) extractions and ion-exchange resin (Plant Root Simulator, PRS) probes at 2-week intervals for 12 weeks and compared to fertilized controls of 0 and 168 kg N ha -1 . In 2009, greater plant available N under hairy vetch than under either 0 N control or crimson clover was found, with peak soil N occurring between 4 and 6 weeks after roll kill. Available soil N under crimson clover mulches was less than or equal to 0 N, suggesting net immobilization.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1106-1119 |
| Number of pages | 14 |
| Journal | Communications in Soil Science and Plant Analysis |
| Volume | 45 |
| Issue number | 8 |
| DOIs | |
| State | Published - Apr 2014 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 2 Zero Hunger
Keywords
- Legume cover crops
- N mineralization
- N synchrony
- Trifolium incarnatum
- Vicia villosa
- nutrient cycling
- organic cropping systems
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