欢迎访问林业科学,今天是

林业科学 ›› 2008, Vol. 44 ›› Issue (5): 58-64.doi: 10.11707/j.1001-7488.20080512

• 论文 • 上一篇    下一篇

民勤沙区主要植物的物候特征

常兆丰 赵 明 韩福贵 仲生年 李发明   

  1. (甘肃民勤荒漠草地生态系统国家野外科学观测研究站 甘肃省荒漠化防治重点实验室 武威733000)
  • 收稿日期:2005-06-01 修回日期:2006-10-17 出版日期:2008-05-25 发布日期:2015-04-22

Phenological Characteristics of Desert Plant in Minqin Desert Area

Chang Zhaofeng,Zhao Ming,Han Fugui,Zhong Shengnian,Li Faming   

  1. (Minqin National Station for Desert Steppe Ecosystem Studies,Gansu Key Laboratory of Desertification Combating of Gansu Province Wuwei 733000)
  • Received:2005-06-01 Revised:2006-10-17 Online:2008-05-25 Published:2015-04-22

摘要:

选择在民勤沙区有代表性的48种植物,利用1985—2004年的观测资料,先就48种植物的9个主要物候期按平均期距进行系统聚类,进而对聚类结果按中生、旱生和沙地旱(中)生植物归并为类群。研究结果表明:从中生植物到旱生植物再到沙地旱(中)生植物,同一物候期的多年变幅增大; 从旱生植物到沙生植物的物候期的多年变幅大于从中生植物到旱生植物的多年变幅; 不同植物的物候期差异主要表现为从花蕾花序期开始到果实脱落末期的各个物候期,从中生植物到旱生植物再到沙地旱(中)生植物,这些物候期表现出逐渐延迟的趋势; 当地冬季漫长,夏季持续日数较长,秋季最短,春季和秋季物候频数分布较多,植物活动日数相对较短; 运用聚类分析方法研究包括中生植物、旱生植物和沙地旱(中)生植物的物候特征,能更好的从不同植物类型来揭示植物物候特征。

关键词: 物候, 气温, 中生植物, 旱生植物, 沙地旱(中)生植物, 民勤沙区

Abstract:

Phenological characteristics of desert plants are important traits to reveal the living habit of plants and to prevent from further desertification. In order to compare the phenological characteristics among mesophyte,xerophyte,and psammophyte,nine phenological phases of 48 typical plant species in Minqin Desert Area were observed for 20 years (1985—2004). The results showed that phenological phases significantly shifted in last 20 years. Xerophyte had the biggest shifting range,followed by the psammophyte and then the mesophyte. In the later autumn,phenological phases were significantly delayed. From mesophyte to xerophyte and then to psammophyte,these phenological phases showed the tendency of postponement. The changes of phenophases of plants in Minqin Desert Area displayed longer winter and summer,and shorter spring and autumn.

Key words: phenology, temperature, mesophyte, xerophyte, psammophyte, Minqin Desert Area