Effects of various straw incorporation methods on the physicochemical properties and nutrient leaching of red soil

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 3; pp. 70 - 76
• Main Authors: CHEN Yuni, SHENG Feng
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.03.2025
• Subjects: red soil; straw returning; aggregate stability; nutrient leaching
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2024283

【Objective】Red soil in Southern China is typically deficient in structure and nutrients. Amending it with straw has been proposed as a method to improve its structure and fertility. This study experimentally examines the effects of different straw incorporation methods on the physicochemical properties of red soil, as well as nutrient leaching.【Method】The experiment was conducted using columns, where soils were repacked into columns and amended with crushed straw, straw powder, or straw ash. The control was soil without amendment. The columns were then subjected to leaching. At the end of the experiment, the physicochemical properties of the soil in each column were measured.【Result】Regardless of the type of straw, amending the soil with it reduced bulk density, increased total porosity and capillary porosity, enhanced soil organic matter, and increased most nutrients, while reducing nutrient leaching. Amending soil with crushed straw was most effective in increasing capillary porosity and reducing nitrate (N