Dynamic Changes of Traits of Leaves from Elaeagnus mollis Relationships between Leaf Nitrogen Content and Photosynthetic Characteristics in Different Plant Functional Types Eco-physiological traits of different-age needles of Pinus sylvestris var. mongolica plantation in Horqin sandy land of China Relationship between photosynthetic nitrogen use efficiency and nitrogen allocation in photosynthetic apparatus of winter oilseed rape under different nitrogen levels Content and Allocation of Nitrogen in Leaves of 8 Tree and Shrub Species of the Evergreen Broad-leaved Forest and the Relations with Their Photosynthetic Abilities Distribution pattern of leaf traits in canopy of typical broad leaved trees in Taiyue Mountain Photosynthesis-nitrogen relationship in evergreen and deciduous tree species at different altitudes on Mao’er Mountain, Guangxi Trade-off between Resource Utilization and Coexistence Status of Roegneria kamoji and Polygonum sphaerostachyum of Alpine Meadow in the South of Gansu Leaf morphology and photosynthetic characteristics of seedlings of a deciduous and an evergreen broad-leaved species under different light regimes in subtropical Effects of N and P additions on foliar stoichiometry and photosynthetic characteristics of Potentilla fruiticosa