In the 1980s, the hilly Qianyanzhou region in Jiangxi Province, southern China, faced severe soil erosion due to deforestation and unsustainable farming practices. Fertile red soil was being washed away causing crop yields to tumble.
But a remarkable change has taken place in the last 30 years thanks to a government-backed land-use plan which has seen the upper hills reforested, citrus orchards planted on moderate slopes, and rice paddies in valley bottoms. Within a few years, this mosaic of sustainable land use was yielding higher incomes. Biodiversity and environmental quality, as well as the microclimate, improved.
In early November 2018, the head of UN Environment’s freshwater, land and climate branch, Tim Christopherson, together with his colleague Xiaoqiong Li, visited several sites in the area to better understand how large-scale ecological restoration works.
Huimin Wang, the director of an ecological research station in Ji’an, Qianyanzhou region, briefed UN Environment on the problem and the centre’s role in restoring the landscape.
“Thirty years ago, this area was denuded of trees and vulnerable to landslides. Erosion gullies washed fertile red soil away,” says Wang.
“We set up this ecological research station to work out how best to restore the land. We brought together experts from around the world, including from the Federal Agency for Nature Conservation in Germany.”
Research focused on forest structure optimization and how to improve ecosystem services from the forest; the structure and functions of forest ecology; carbon, water and nutrient cycling in forest ecosystems under climate change; and the Qianyanzhou upgrade model to be achieved by improving ecological and economic benefits in the watershed.
Another key element of the restoration process was agroforestry, supported by the local government: farmers continued to grow cash crops such as peanuts, sesame and vegetables among the restored orchards, and breed Silkie chickens (black-boned with fluffy plumage) in orchards and forest plantations. This ensured economic returns in the early stages of the project and helped improve soil fertility. As well as building dams and ponds, government agencies provided loans to households to help them get started.
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