Relationships among light conditions, crown structure and branch longevity: a case study in Osmanthus fragrans and Metasequoia glyptostroboides Population regulation and dynamical simulation of annual plant Eragrostis poaeoides in desert region Biomass Allocation of Scirpus mariqueter Along an Elevational Gradient in a Salt Marsh of the Yangtse River Estuary Effect of irrigationfrequency on life history strategy and yield formation in Jerusalem artichoke(Helianthus tuberosus.L) in oasis of Hexi Corridor A discussion on the non-hydraulic root-sourced signals and life history strategy of wheat crops Convergent adaptation of desert plants to their arid habitats Review of research on seed heteromorphism and its ecological significance EXPERIMENTAL STUDIES ON FATE OF LARIX GMELINI SEEDS IN THE SOIL IN OLD-GROWTH LARCH STANDS