摘要
利用甘肃民勤西沙窝地区1983 ～ 2012年观测的64种48属乔灌植物以及在年生命周期内主要物候期持续时间、物种频度、花朵、结实数量等物候资料,聚类分析其适应干旱荒漠环境的适生特点,并依此划分出迟发、夏休眠、种速熟、候期间歇、种晚熟、宿种、多次花、多花、丰种9种对策类群.结果表明,植物或调整了原生地物候规律对应适生干旱荒漠环境,或产生较大的生理属性变化回避环境因素制约,造就了各自的扩展空间与适生繁殖能力,一些特殊植物兼备了多重适生对策,成为判别荒漠区优势植物种的重要标志.
Abstract
Shrubs and arbors of 48 species in 64 families were observed from 1983 to 2012 in Xishawo Area of Minqin County.In the annual life cycle of major arbors and shrubs, duration time of phenological period, species frequency, flower and fruiting numbers were analyzed.Cluster analysis was carried out on the suitable characteristics for arid desert environment.Nine countermeasure groups were classified, which were late growth, summer dormancy, seed fast ripe, period of intermittent, seed late ripe, host species, flowering times, abundant flowers and abundant seeds.Results showed that shrubs and arbors adapted to the harsh arid desert environment by adjusting the natively phenological regularity, or avoided the restricts of environmental factors by producing relatively great changes of physical properties.Thus, the expanded space and reproductive capacity were enhanced.Some special plants had multiple growth countermeasures, which was an important index to identify the dominant plant species in desert region.
国家科技期刊平台
NSTL
维普
万方数据