Forest genetic resources / Projects / China
Pines and other conifers
With the aim of enriching the diversity of tree species in Korqin Sandy Lands, where Pinus sylvestris var. mongolica (Mongolian pine) is almost the only species used for afforestation, the project sought to introduce new conifer species. The project introduced about 100 provenances of 20 conifer species and tested them at project outstations, and studies were carried out on the introduction and use for afforestation of P. banksiana, P. sylvestriformis and P. sylvestris. As a result, P. banksiana and P. sylvestriformis, whose growth and resistance properties were better than those of P. sylvestris var. mongolica, were identified as promising species for planting in the region. Picea spp. and Pinus sylvestris also showed good potential for future development. This research increased the number of tree species tested in the Korqin Sandy Lands and provided sound material and a theoretical basis for further desertification control in the region. The introduction and extension of new conifer species will hopefully contribute to changing single species cultivation in the region.
Plantation trials with 14 Mongolian pine provenances
The project carried out comparative trials in order to select suitable provenances of P. sylvestris var. mongolica for planting in the project area. After selecting superior trees and collecting seed from 14 Mongolian pine production areas, seedlings were raised and plantation trials set up at all project branches. Two provenances (Qingshang and Ggaofeng) were identified as the best, with strong potential for adaptation and growth. These two provenances showed superior performance in plantation trails at Zhangwu, Naiman and Tongyu sites, where growth is 20% higher than that of the local provenance. They were highly recommended for testing on a larger area.
Research on the Chatfield Conifer Planter and extension of the conifer rooting cutting technique
With the assistance of national and international experts, the project developed a Chatfield Conifer Planter. The equipment was used to prune the long rooting system of young conifer plants in nurseries, thus allowing them a develop a better system was later installed in the field. Traditionally, the conifer seedlings were shifted to different seedbeds before being transferred to the field; with this technique, the seedling roots were cut off with the machine, while seedlings were left in place. This technique increased seedling quality and their survival rate in plantations. Seedlings raised under this technique also had well-developed side roots, strong growth and high survival rate. Most importantly, such technique required low input, so it was well accepted by local farmers.
FAO. 2002. Technical project review document. Rome.