In the water-limited arid and semi-arid regions, shrubs are more suitable than trees and should be considered the priority option for afforestation.  

Caragana korshinskii is a dominant shrub species in arid desert regions and has been widely introduced planting to the Loess Plateau owing to its strong sand-fixing and soil and water conservation functioning. 

However, the research on radial growth characteristics and ecological response of C. korshinskii under different precipitation gradients is still insufficient. 

Recently, a research team led by Prof. XIAO Shengchun from the Northwest Institute of Eco-Environment and Resources of the Chinese Academy of Sciences (CAS) synthesized the stability maintenance and sustainable management of shrub plantation forests in the western Loess Plateau region. 

Related results were published in Frontiers in Plant Science on April 8. 

This study was based on tree ring width data of shrub C. korshinskii Kom. In some natural and plantation forest sampling sites that spanned the different precipitation gradient (180–415 mm) across China’s western Loess Plateau, researchers demonstrated its radial growth dynamics, mainly limiting factors and forest management. 

Research results showed that, according to the climate-growth relationships, compared with natural C. korshinskii in arid desert regions, the planted C. korshinskii in arid and semi-arid regions of the Loess Plateau are more significantly affected by drought stress during the growing season (from June to September) 

Meanwhile, with increase of precipitation, the limiting of drought on the growth of planted C. korshinskii gradually decreased. 

Researchers also found that, in the context of climate change, regular branch coppicing management at around 12 years old will help to mitigate limitation of drought on growth of planted C. korshinskii.  

Besides, the initial planting density should be tailored to local precipitation conditions. 

This study has important theoretical and practical significance for the maintenance of stability and sustainable management of plantation forests in the western Loess Plateau in the context of climate change. 

Contact: 

CHE Cunwei 

E-mail: checunwei@nieer.ac.cn