Humalite enhances the growth, grain yield, and protein content of wheat by improving soil nitrogen availability and nutrient uptake
Rathor, P., V. Rouleau, L. Y. Gorim, G. Chen and M.S. Thilakarathna. 2023.
Abstract
Background: The application of synthetic chemical inputs in current agricultural practices has significantly increased crop production, but their use has caused severe negative
consequences on the environment. Humalite is an organic soil amendment that is rich
in humic acid and found in large deposits in southern Alberta, Canada. Humic products
can enhance nutrient uptake and assimilation in plants by reducing nutrient losses and
enhancing bioavailability in the soil.
Aim: Here, we evaluated the effects of different humalite rates in the presence of nitrogen, phosphorus, potassium (NPK) at recommended rates on soil nitrogen availability,
wheat growth, grain yield, seed nutritional quality, and nitrogen use efficiency (NUE)
under controlled environmental conditions.
Methods: A series of studies were conducted by applying five different rates of humalite
(0, 200, 400, 800, and 1600 kg ha-1) with NPK at recommended rates. Soil nitrogen availability and shoot and root growth parameters were recorded at flowering stage. NUE was
calculated based on the grain yield at maturity stage.
Results: Plants grown in the presence of humalite augmented root morphological parameters (root length, volume, and surface area), plant biomass (shoot and root), and nutrient
uptake (N, P, K, and S) compared to the plants supplied with recommended fertilizer alone.
Furthermore, humalite application significantly increased grain yield (14%-19%), seed
protein content (23%-30%), and NUE (14%-60%) compared to the fertilizer application
alone.
Conclusion: These findings suggest that humalite can be used as an organic soil amendment to reduce synthetic fertilizer application and improve plant growth and yield while
enhancing fertilizer use efficiency
Key Words
humic products, nitrogen use efficiency, plant root simulator probes, roots, shoots
