The Studies of the Photosynthetic Characteristics of Larix olgensis Herry., Larix kaempferi Carr. and Larix gmelinii Rupr. Seedlings Ecoregion based Height-diameter Models for Larix gmelinii Rupr. in Daxing’an Mountains A STUDY ON THE GROWTH AND YIELD OF NATURAL DAHURIAN LARCH STANDS THE RELATIONSHIP BETWEEN pH CHANGES AND P-AVAILABILITY IN RHIZOSPHERE OF LARIX GMELINII Stem sap flow of Dahurian larch (Larix gmelinii Rupr.) trees transplanted from a latitudinal gradient Vernal soil respiration of Larix gmelinii Rupr. forests transplanted from a latitudinal transect