Salman, . (2023) Effect of crop rotation and different nitrogen sources on soil water retention and silage corn forage yield and quality in boreal climate. Masters thesis, Memorial University of Newfoundland.
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Abstract
By implementing crop rotation and different nitrogen (N) sources, farmers can improve soil properties, leading to increased soil water retention (SWR) and ultimately enhancing crop yield and quality. This thesis research aimed to examine the impact of crop rotation and N sources on SWR, silage corn yield, and quality in boreal climates. A field trial was established in 2019 – 2021. Treatments were arranged in a split-plot design with four replicates. Rotation sequences were the main plots, and N sources were the subplots. Three models (van Genuchten, Brooks & Corey, and Durner) were applied to predict SWR curves (SWRC). The van Genuchten and Durner models provided more accurate predictions of SWRC than the Brooks & Corey model. Corn-corn-corn*agrotain (AG) showed superior agronomic performance and produced 17.75 Mg h-1 of forage yield compared to all others intreactions. SuperUTM produced higher non-fibrous carbohydrates, whereas AG produced higher forage energies (net energy of laction, net enery of gain, net enery of maintenance) and total digestible nutrient (TDN), than control. These findings suggest that AG and SU could be suitable choices to attain high forage yield and quality for dairy livestock under boreal climate.
| Item Type: | Thesis (Masters) |
|---|---|
| URI: | http://research.library.mun.ca/id/eprint/16097 |
| Item ID: | 16097 |
| Additional Information: | Includes bibliographical references -- Restricted until December 31, 2025 |
| Keywords: | crop rotations, nitrogen sources, soil water retention curve, forage yield and quality, boreal climate |
| Department(s): | Grenfell Campus > School of Science and the Environment > Boreal Ecosystems and Agricultural Sciences |
| Date: | August 2023 |
| Date Type: | Submission |
| Digital Object Identifier (DOI): | https://doi.org/10.48336/BXP0-RK21 |
| Library of Congress Subject Heading: | Crop rotation; Crop yields; Taiga ecology; Soil moisture conservation; Soils—Nitrogen content, Nitrogen |
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