华山新麦草濒危原因及种群繁殖对策

华山新麦草特产于我国华山，为国家一级保护植物。由于华山新麦草和小麦属于亲缘种，并且具有很强的抗旱性和耐盐性，所以对其的研究就 很有实践意义。从生境特征和繁殖对策的角度对其濒危原因进行了探讨。华山新麦草生长在恶劣和不连续的生境中，每个居群个体数量都很少。极低的繁殖分配造成其有性繁殖水平低下。脆弱的竞争力和沉重的环境压力共同作用使华山新麦草侧重选择了营养繁殖方式，在生活史上策略上选择上偏重于K－策略。

Endangering reason and reproductive strategy of Psathyrostachys huashanica population

Psathyrostachys huashanica is perennial herb belongs to Psathyrostachys of hordeeae of pooideae in Gramineae.Psathyrostachys distribute in center of middle Asia and Caucasus Mt.,but Psathyrostachys huashanica are only located on the Qinling Mt.in China.At present,the amount of the population is much less than the past,being at the edge of extinction.Owing to distributing limitation and importance as breeding material for germplasm storage,it was listed into the first class of national protected rare plants ...