石羊河下游白刺的繁殖物候及其结果习性
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1.甘肃民勤荒漠草地生态系统国家野外科学观测研究站;2.甘肃农业大学;3.甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃农业大学

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甘肃省重大项目“八步沙及河西走廊典型风沙区退化防风固沙体系修复关键技术研究与示范:(21ZD4FA010)”


The propagation phenological phase and fruiting habits of the Nitraria tangutorum in the lower reaches of the Shiyang River
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    摘要:

    【目的】结果习性是选育植物良种及其科学管理的基础,调查石羊河下游的白刺,确定其繁殖物候和结果枝特征以及果实性状,为其优良种质选择和栽培管理提供参考。【方法】结合生物生态学调查方法,在野外调查基础上运用物候学和生物学分析方法,统计分析调查区白刺物候及其结果习性。【结果】3年生白刺开始开花结果,当年花芽分化,混合芽在翌年可发育成结果枝,开花结果;营养枝和枝刺都可形成花芽,其中营养枝占比66.67%。结果母枝生长果枝、营养枝、结果枝+营养枝和枝刺,结果枝显著多于其他类型枝(P<0.05);结果枝数平均占比81.49%;结果枝可分为短果枝(2~6 cm,42.72%),中果枝(6~10 cm,52.43%)和长果枝(10.1~11.6 cm,4.85%。营养枝和枝刺的果序平均数分别为6.62,6.69个,结果率3个/序的占比分别是56.41%和39.13%,但是二者差异不显著(P>0.05)。白刺果实为长圆形,横径与其性状的关系大于纵径,且显著影响鲜果重。白刺花蕾形成至果实开始脱落的时间为25~40 d。【结论】白刺的花期和果期都随气候变暖有提前和延长趋势,结果母枝是一种复合性枝,枝类型和结果习性受生境影响小于果实性状。

    Abstract:

    [Objective] Fruiting habits was the basis for the selection of plant varieties and scientific management, and the investigation of Nitraria tangutorum in the lower reaches of Shiyang River determined the propagation phenological phase and characteristics of fruit branches, fruit traits, providing a reference for excellent germplasm selection and cultivation management. [Methods] Combined with the biological and ecology survey method, the phenological and biological analysis methods were used to statistically analyze the phenology and fruit habits by the basis of the field investigation in the survey area. [Results] 3-year-old N. tangutorum began to flower and bear fruit. The flower buds differentiation in the same year, and the mixed bud would develop a fruit branch in the second year, and flowers and bears fruit. Both of vegetative branches and branches thorn could generate flower buds, of which 66.67% were vegetative branches. It was results that the mother branch grew fruit branches, vegetative branches, fruiting branches + vegetative branches and branches thorn, and the fruiting branches were significantly more than other types of branches (P0.05). The fruit shape of N. tangutorum was oblong, and the relationship between the trans verse diameter and its traits was greater than the longitudinal diameter, and it significantly affected the weight of the fresh fruit. The period from flower bud to fruit dropping of N. tangutorum was about 25 40 d, which flowering and fruit stage with the climate warm of the trend of advance and prolongation. The fruit traits would be affected by the environment. [Conclusion] The flowering and fruiting stages of N. tangutorum tended to advance and lengthen with climate warming, and the fruiting mother branch was a composite branch, and the branch type and fruiting were less affected by the habitat than that of fruit index.

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刘虎俊,刘筠,刘淑娟,等.石羊河下游白刺的繁殖物候及其结果习性[J].西北植物学报,2024,44(12):1965-1972

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  • 收稿日期:2022-10-26
  • 最后修改日期:2024-11-19
  • 录用日期:2024-11-21
  • 在线发布日期: 2024-11-22
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