MATING SYSTEM AND GENETIC DIVERSITY IN A PINUS TABULAEFORMIS CARR. SEED ORCHARD BEFORE AND AFTER THINNING去劣疏伐对油松种子园交配系统及遗传多样性影响的研究
The Regeneration and Survival of Pinus tabulaeformis Carr. Population in Xiaolongshan Nature Reserve小陇山国家级自然保护区油松种群更新及生存