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Generation of Water-Stable Soil Aggregates for Improved Erosion Control and Revegetation Success; Final rept
| 题名： | Generation of Water-Stable Soil Aggregates for Improved Erosion Control and Revegetation Success; Final rept |
| 作者： | Claassen, V. P.; Hogan, M. P. |
| 关键词： | Revegetation; Erosion control; Soil stabilization; Soil erosion; Soil structure; Mineral composition; Nutrients; Organic matter; Composts; Fertilizers; Biomass; Plant growth; Vegetation establishment |
| 摘要： | This project summarizes the mechanism of water-stable aggregate formation and concludes that sustained, vigorous plant growth is essential to maintenance of soil structure. Plants contribute to water-stable aggregates by adding carbon materials to the soil that are decomposed by soil microbes. Exudates from roots and soil microbes contribute to the formation of microaggregates, while fine roots and mycorrhizal hyphae contribute to the stabilization of macroaggregates. To evaluate the levels of N needed for sustained plant growth, the authors surveyed a wide range of disturbed but revegetated sites in the Tahoe Basin, and correlated the percent plant cover with soil N pools. Plant communities with > 40% ground cover were associated with soil containing an average of 1228 kg total N/ha and 26 kg mineralizable N/ha. |
| 总页数： | 140p |
| 报告类型： | 科技报告 |
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