The clayey Ultisols in low hilly area in southeastern China were called for agricultural reclamation to meet the increasing food demand. However, little attention was given to soil erosion during land use planning due to lack of information on the amount of soil erosion and how to restore the severely eroded bare soils. The objectives were to estimate the long-term influences of reforestation on soil and water erosion and nutrient losses on a severely eroded bare land derived from Quaternary red clay. The results indicated that reforestation using integrative measures decreased surface runoff and soil erosion on the severely eroded land. On the severely eroded bare land, annual runoff varied from 303 to 1056 mm and annual total soil loss from 53 to 256 tons ha1. After reforestation, soil erosion dramatically reduced to 2–43 tons ha1 year1 from 1988 to 1990 and became negligible since then. The high level of soil erosion was attributed to high rainfall erosivity, readily transportable particles due to the presence of pseudo sand on the bared soil surface formed in the dry season and due to clay dispersion occurring in the long rainy season, and the gully landform. Depositional soil loss accounted for the high proportion of soil loss, while enrichment ratios (ER) of soil nutrients in the suspensional sediment were greater than 1. The results suggest that soil erosion has to be taken into account when planning to convert the clayey soils in the low hilly area for agricultural use, and integrative measures to reforest are key to prevent soil erosion on the severely eroded bared land.
CIFOR-ICRAF aborda retos y oportunidades locales y, al mismo tiempo, ofrece soluciones a los problemas globales relacionados con los bosques, los paisajes, las personas y el planeta.
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CIFOR-ICRAF produce cada año más de 750 publicaciones sobre agroforestería, bosques y cambio climático, restauración de paisajes, derechos, políticas forestales y mucho más, y en varios idiomas. .
CIFOR-ICRAF genera impacto mediante conocimiento científico de vanguardia. Desarrollamos investigaciones innovadoras, fortalecemos las capacidades de nuestros socios y dialogamos activamente con todas las partes interesadas, aportando el conocimiento más reciente sobre los bosques, árboles, paisajes y personas para la toma de decisiones a escala mundial.
CIFOR-ICRAF aborda retos y oportunidades locales y, al mismo tiempo, ofrece soluciones a los problemas globales relacionados con los bosques, los paisajes, las personas y el planeta.
Aportamos evidencia empírica y soluciones prácticas para transformar el uso de la tierra y la producción de alimentos: conservando y restaurando ecosistemas, respondiendo a las crisis globales del clima, la malnutrición, la pérdida de biodiversidad y la desertificación. En resumen, mejorando la vida de las personas.
CIFOR–ICRAF achieves science-driven impact. We conduct innovative research, strengthen partners’ capacity and actively engage in dialogue with all stakeholders, bringing the latest insights on forests, trees, landscapes and people to global decision making.
CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.
CIFOR–ICRAF addresses local challenges and opportunities while providing solutions to global problems for forests, landscapes, people and the planet.
We deliver actionable evidence and solutions to transform how land is used and how food is produced: conserving and restoring ecosystems, responding to the global climate, malnutrition, biodiversity and desertification crises. In short, improving people’s lives.
