《Table 1 Seasonal and annual precipitation (mm) of the study area》

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《Forest recovery after clear-cutting in Chinese pine(Pinus tabuliformis) plantations of North China》

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Note:Spring means the period of March–May；Summer，June–August；Autumn，September–November；Winter，December–February of the next year.

The study area of Chinese pine plantations was situated in Pingquan County，Hebei Province，North China（Fig.1）.It was approximately 250 km northeast of Beijing.It belongs to the temperate continental monsoon mountain climate.The annual mean temperature was 7.4°C and the annual precipitation was 356.7–620.3 mm from 2004 to 2015（Table 1）.The main soil type was mountain cinnamon soil with gravel.In the study area，the area of plantations has accounted for 95%of the total forest area in Pingquan County，with four main species including Chinese pine，aspen（Populus davidiana），Mongolian oak（Quercus mongolica）and black locust（Robinia pseudoacacia）.And the area of Chinese pine plantations was the largest，with an area of 8901.85hm2 and accounted for 61.6%of the local total forest area.