青藏高原东北部不同降水梯度下高山林线祁连圆柏径向生长与气候关系的比较
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Comparison of growth-climate relationship of Sabina przewalskii at different timberlines along a precipitation gradient in the northeast Qinghai-Xizang Plateau, China
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图3. 林线祁连圆柏树木年轮指数及各年表样本量。左图为低龄年表, 右图为高龄年表。HB, 河北林场; HL, 哈里哈图国家森林公园; QS, 曲什岗地区。 |
Fig. 3. Tree-ring index of Sabina przewalskii in timberline and sampling depth of each chronology. The left and right figures indicate the tree-ring index of young- and old-growth S. przewalskii respectively. HB, Hebei Forest Farm; HL, Halihatu National Forest Park; QS, Qushigang. |
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