石蒜叶期生物量、根系活力的动态变化及更替规律

doi:10.3969/j.issn.1000-2006.201706055

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南京林业大学学报（自然科学版） ›› 2018, Vol. 42 ›› Issue (01): 55-59.doi: 10.3969/j.issn.1000-2006.201706055

石蒜叶期生物量、根系活力的动态变化及更替规律

蔡军火¹, 李金峰¹,魏绪英^1,2,张露^1,3*

1.江西农业大学园林与艺术学院,江西南昌 330045; 2.江西财经大学艺术学院,江西南昌 330032; 3.江西农业大学,江西特色林木资源培育与利用2011协同创新中心,江西南昌 330045

出版日期:2018-03-30 发布日期:2018-03-30
基金资助:
基金项目:国家自然科学基金项目(31560226); 江西省科技厅星火计划项目(2012BBF61045) 第一作者:蔡军火(cjhuo7692@163.com),副教授,博士。*通信作者:张露(zhlu856@163.com),教授,博士。

Dynamic change in biomass, root vigor and replacement rate during the green leaf period of Lycoris radiat

CAI Junhuo¹,LI Jinfeng¹,WEI Xuying^1,2,ZHANG Lu^1,3*

1. College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045,China; 2. College of Art,Jiangxi Finance and Economics University,Nanchang 330032,China; 3. 2011 Collaboration Innovation Center of Jiangxi Typical Trees Cultivation and Utilization,Jiangxi Agricultural University, Nanchang 330045,China

Online:2018-03-30 Published:2018-03-30

摘要/Abstract

摘要： 【目的】为进一步解析石蒜“花叶不遇”的特殊习性,有必要从器官发育与物质积累的视角,深入探究石蒜的根系、鳞茎和叶的生长发育不同步现象。【方法】采用随机区组试验设计,运用TTC法和根系扫描法,对石蒜绿叶期的生物量构成(鳞茎、根系、叶片)与根系活力及新老根系的更替规律进行了研究。【结果】有叶期(即10月至次年5月)的石蒜总生物量呈持续增长态势,根系和叶片的干质量均表现为“先增后降”的变化趋势(根系干质量在12月达到最大); 叶片干质量的最大值则延后至1月; 鳞茎干质量的变化则表现为“前期变化不大,总体渐增”的趋势,至5月最大。【结论】石蒜根系和叶片的生长节律基本一致,但根系生长物候要略早于叶片。绿叶期少有新根的萌发,期间主要表现为根系的伸长生长。根的衰退期集中于1—4月; 5月为新老根的交替高峰期,有大量Ⅰ级根的萌发,而Ⅱ、Ⅲ级根萌发集中于11—12月。

Abstract: 【Objective】To further elucidate the special habits of the non-flowering and leaf periods of Lycoris radiata, it is necessary to explore the rate of growth and development of different organs(roots, bulbs and leaves). 【Method】The biomass composition(bulbs, roots and leaves), root vigor, and the replacement rate for L. radiata during the leaf period were studied with the combined methods of Triphenyltetrazolium chloride(TTC )and root scanning. 【Result】 During the leaf period(from October to April in the next year), the total biomass of L. radiata continued to increase, and the dry weight of leaves and roots experienced similar trends in change in dry weight(initially increasing and then decreasing).However, they reached a maximum in December and January. Conversely, the bulbs exhibited a different trend(continuously increasing)during the same time, and their dry weight was the highest in May. 【Conclusion】The results showed that the growth rhythm of roots and leaves was similar, although the root phenology was slightly earlier. During the leaf phase, there was scarcely any root germination, but root elongation growth occurred. In addition, the old roots declined gradually from January to April, and new roots germinated in May. Furthermore, new secondary roots mainly germinated from November to December.

中图分类号:

S682.2

蔡军火,李金峰,魏绪英,等. 石蒜叶期生物量、根系活力的动态变化及更替规律[J]. 南京林业大学学报（自然科学版）, 2018, 42(01): 55-59.

CAI Junhuo,LI Jinfeng,WEI Xuying,ZHANG Lu. Dynamic change in biomass, root vigor and replacement rate during the green leaf period of Lycoris radiat[J].Journal of Nanjing Forestry University (Natural Science Edition), 2018, 42(01): 55-59.DOI: 10.3969/j.issn.1000-2006.201706055 .

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石蒜叶期生物量、根系活力的动态变化及更替规律

Dynamic change in biomass, root vigor and replacement rate during the green leaf period of Lycoris radiat

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