We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Mineral phosphorus fertilization for silage corn in manured soils in the Fraser Valley, Canada.
- Authors
Nyamaizi, Sylvia; Messiga, Aimé J.; Cornelis, Jean‐Thomas; Smukler, Sean M.; Cade‐Menun, Barbara J.
- Abstract
Efficient management of fertilizer phosphorus (P) is crucial for enhanced resilience of agro‐ecosystems. We assessed five rates (0, 5, 10, 15, and 20 kg P ha−1) of starter P fertilizer on silage corn (Zea mays L) yield in high‐P manured soils at eight sites in 2020 and 2021 in the Fraser Valley, Canada, monitoring soil phosphate concentrations using anion exchange membranes (AEM‐P). At the V3 and V6 (3‐ and 6‐leaf) stages, corn dry matter (DM) weight response to starter P was not significant, except at one site where the critical rate was 5 kg P ha−1. At maturity, corn DM yields were in the optimum provincial range (20–25 Mg ha−1), with the exception of two sites, one with low initial soil P concentrations and the other with waterlogged soils. These results indicate that during the growing season, phosphate supply from manure application alone was sufficient for silage corn growth. Root length and diameter were not affected by starter fertilizer, while root surface area, volume, and root DM weight decreased with increasing starter fertilizer at the V3 stage in 2020. In addition, AEM‐P increased with starter P only during the first week after application. We conclude that starter fertilizer P, at any application rate, in high‐P manured soils does not improve silage corn yield; farmers applying manure at plowing in soils with high P concentrations can reduce or eliminate starter fertilizer P without impacting silage corn yields, decreasing reliance on off‐farm P inputs, and reducing potential P loss to the environment. Core Ideas: Response of silage corn to starter fertilizer phosphorus (P) in high‐P manured soils was not consistent across eight sites.Critical starter fertilizer P rate was maximum 5 kg P ha−1 in one responsive site.Mature silage corn yield was not increased by starter fertilizer P across sites.Anion Exchange Membrane‐P mimicked starter P rates only during the first week.Mineral starter P has no benefit in fields with high soil test P receiving manure.
- Subjects
CANADA; PHOSPHATE fertilizers; ION-permeable membranes; SILAGE; PLOWING (Tillage); SOILS; CORN; WATERLOGGING (Soils); SOIL mineralogy
- Publication
Agronomy Journal, 2024, Vol 116, Issue 1, p362
- ISSN
0002-1962
- Publication type
Article
- DOI
10.1002/agj2.21517