Soil health response to sugarcane straw removal in Brazil
| العنوان: | Soil health response to sugarcane straw removal in Brazil |
|---|---|
| المؤلفون: | Euriana M. Guimarães, Douglas L. Karlen, Guilherme Adalberto Ferreira Castioni, Maurício Roberto Cherubin, Carlos Eduardo Pellegrino Cerri, Sarah Tenelli, Ricardo de Oliveira Bordonal, Lucas Augusto de Assis Moraes, Lauren Maine Santos Menandro, João Luís Nunes Carvalho, Izaias Pinheiro Lisboa |
| المصدر: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Soil health, Soil test, 010405 organic chemistry, Soil texture, Soil carbon, Straw, complex mixtures, 01 natural sciences, 0104 chemical sciences, SOLOS, Soil management, Agronomy, Bioenergy, Soil water, Environmental science, Agronomy and Crop Science, 010606 plant biology & botany |
| الوصف: | Sugarcane straw removal is a promising strategy to increase bioenergy production in Brazil. However, if straw removal is not properly managed, it may lead to soil health degradation, thus threatening sustainability of the entire bioenergy production system. In this context, a comprehensive assessment was conducted in 12 field experiments located in central-southern Brazil, the world’s largest sugarcane-producing region, to investigate the impacts of straw removal scenarios on soil health, using the Soil Management Assessment Framework (SMAF). Two groups of experiments were arranged in this study, consisting of three (no–NR; moderate–MR; and total removal–TR) and four straw removal treatments (NR; low–LR; high–HR; and TR). Soil samples were collected (0–10 and 10−20 cm) to evaluate a selected set of soil health indicators (i.e., pH, available phosphorus, exchangeable potassium, bulk density and soil organic carbon). Indicators were individually scored and then integrated into an overall Soil Health Index (SHI) and its chemical, physical, and biological components. Datasets were analyzed by site, experiment groups and soil texture (clayey and sandy soils) and the relationships among straw removal, soil health, and sugarcane yield were also investigated. Our findings showed that soil health responses to straw removal were properly detected by SMAF scoring curves. Based on SHI, sandy and clayey soils were functioning at 41–56% and 67–86% of their full potential, respectively. Soil health degradation was mostly induced by TR and HR, while LR and MR resulted in minimal detrimental effects on a short-term basis compared with NR. However, sandy soils were more prone to soil health degradation, indicating that straw removal should be avoided on those soils. For clayey soils, decline in soil health was driven by physical degradation. Healthier soils were associated with higher sugarcane stalk yields, and physical degradation was the main driver for crop yield losses. Conclusions drawn from this study suggest that comprehensive soil health assessments by integrating chemical, physical and biological indicators are fundamental to design more sustainable straw management and bioenergy production systems in Brazil. |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18d61cc14e046831baa403a458a42cfd |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....18d61cc14e046831baa403a458a42cfd |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |