[Responses of radial growth of from different provenances to climate at Maoershan in Northeast China].

To understand the responses of radial growth of from different provenances to climatic factors, we used the dendrochronological method to establish the standard chronologies of from 20 provenances in Maoershan provenance test forest, and analyzed the differences in radial growth and their correlation with climate factors. The results showed that the overall trend of chronologies from 20 provenances was generally similar. There were differences in growth amplitude, with the average radial growth of from Dailing, Lushuihe and Sanchazi being the highest. The radial growth of from 20 provenances was significantly positively correlated with the highest temperature in July and the average temperature in July except for Huinan. The radial growth of from 14 provenances was significantly positively correlated with the precipitation in August. The radial growth of was constrained by temperature and precipitation during the growing season. There was difference in radial growth among from different provenances under drought stress. from Wangqing, Dailing, and Hailin had stronger resistance to drought, while that from Wandianzi, Zhanhe, and Xinglong had better recovery ability after drought.