青藏高原高寒草甸组分种花期物候对施肥响应

摘要/Abstract

摘要： 青藏高原东部高寒草甸封育和施肥生境中18个植物物种物候对施肥的响应结果表明,施肥导致双子叶植物(不含豆科)的始花期、开花峰值期和终花期轻度提前或者轻度推迟,花期持续时间轻度延长或者缩短;豆科植物的始花期轻度推迟,开花峰值期和终花期与对照无差异,花期持续时间轻度缩短;施肥未能够显著改变双子叶组分种的花期物候。施肥导致禾本科物种的始花期、开花峰值期、终花期显著推迟,花期持续时间轻度延长或者缩短。对照(封育)群落组分种种间开花峰值期为集中分布,科内开花峰值期为随机分布;施肥处理下群落组分种间开花峰值期为集中分布,双子叶组分种科内开花峰值期为随机分布,禾本科组分种科内开花峰值期为集中分布;施肥改变了施肥生境中禾本科组分种的花期分布模式。高寒草甸群落组分种花期物候对施肥响应存在差异。

Abstract: We observed the flowering of 18 dominating species selected from controlled and fertilized grasslands in Eastern alpine meadow of Qinghai-Tibet Plateau, and analyzed the response of flowering phenology to fertilization. The result showed: In fertilized habitats, the forbs initial flowering days, peak flowering days and flowering conclusion days were either slightly accelerated or retarded than the flowering phases of the corresponding species in controlled habitats, the flowering duration days were either slightly truncated or prolonged than the duration days of the corresponding species in controlled habitats; the leguminous species initial flowering days were delayed, the peak flowering days and the flowering conclusion days were not different and the flowering duration days were slightly truncated than the phases of the corresponding species in controlled habitats, the fertilization did not significantly change the dicotylous species flowering phases. The gramineous species initial flowering days, peak flowering days and flowering conclusion days were significantly retarded, the flowering duration days were either slightly truncated or prolonged than the corresponding species phenological phases in controlled habitats, the fertilization significantly changed the gramineous species flowering phases. In controlled habitats, the peak flowering distribution patterns were aggregated across species, randomly distributed within families, in fertilized habitats which were aggregated across species, randomly distributed within dicotylous families, aggregated within gramineous family, the fertilization did change the gramineous species flowering distribution pattern as well. This research manifests that the flowering phonological response of alpine community species reacts differently to fertilization.

中图分类号:

S812
Q142.2

巴雅尔塔,贾鹏,杨晓,杜国祯. 青藏高原高寒草甸组分种花期物候对施肥响应[J]. 草业学报, 2010, 19(3): 233-239.

Bayaerta, JIA Peng, YANG Xiao, DU Guo-zhen. Response of dominating species flowering phenology to fertilization in Qinghai-Tibetan alpine meadow[J]. Acta Prataculturae Sinica, 2010, 19(3): 233-239.

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