首页分享南方红豆杉不同种源种子千粒重、生活力、营养化学成分含量的比较及其与生态因子的关系

南方红豆杉不同种源种子千粒重、生活力、营养化学成分含量的比较及其与生态因子的关系

来源：花匠小妙招时间：2024-12-05 18:15

摘要： 为揭示不同地区南方红豆杉种子营养化学成分含量的差异及其与生境因子的关系,为人工种植红豆杉筛选优质种源提供理论依据,对采自安徽、福建、四川三省的南方红豆杉种子进行测定分析,结果表明,南方红豆杉种子千粒重与生活力相关性显著;不同地区之间南方红豆杉种子营养化学成分的相对含量差异显著。其中,安徽省聂家山种子的千粒重、生活力及贮藏物质含量较高、含水量较低,种子品质较高。气候因子对南方红豆杉种子营养化学成分相对含量的影响不是单一的,年降水量与种子的千粒重及生活力显著相关,土壤特征与种子千粒重及生活力的相关性不显著,土壤全钾及有机质利于南方红豆杉种子中营养化学成分的积累,而pH、电导率和全氮对南方红豆杉种子营养化学成分的相对含量影响不显著。

关键词: 南方红豆杉, 种子, 千粒重, 生活力, 化学成分, 生态因子

Abstract: The relative content of the chemical constituents of T.chinensis var. mairei seeds, collected from its natural distribution in Anhui, Fujian and Sichuan Provinces, was determined and analyzed by using conventional chemical methods, aiming to reveal the differences of the chemical constituents of T.chinensis var. mairei seeds from different geographical areas and their relationship with the growing environment elements, and to provide scientific foundation for artificial planting Taxus and screening the fine seedling source. The 1000-seed weight and viability had a remarkable correlation, and the relative content of the chemical constituents significantly varied among samples from different regions. The seeds from Niejiashan in Anhui had better quality with higher 1000-seed weight, viability and reserve substance content and lower moisture of the seeds. Climatic factors had multiple effects on the relative content of the chemical constituents. The 1000-seed weight and viability of the seeds had significant correlation with annual precipitation; their correlation with soil characteristics was un-significant. The total K in soil and organic matter benefited the nutrient accumulation of the chemical constituents in the seeds while the pH, electrical conductivity and total N had no significant correlation with it.

Key words: Taxus chinensis var. mairei, seed, 1000-seed weight, viability, chemical composition, ecological factor

中图分类号:

S791.49