不同处理方式对软荚红豆种子萌发及幼苗生长的影响

2016-07-10 05:31:59王思荣
安徽农业科学 2016年5期

王思荣

摘要[目的]研究不同处理方式对软荚红豆种子萌发和幼苗生长的影响。[方法]以软荚红豆种子为研究对象,分析不同浸种方式、消毒方式、种子破皮后处理方式及育苗基质对软荚红豆种子萌发、幼苗生长、生物量积累的影响。[结果]75 ℃热水浸种及破种皮后砂藏处理能极显著提高种子发芽率,显著促进幼苗生长和生物量积累;高锰酸钾消毒及火烧土∶黄心土=1∶2的培养基质在一定程度上能提高种子发芽率,促进幼苗生长和生物量积累。[结论]该研究为软荚红豆种子播种繁殖提供了技术支撑。

关键词 软荚红豆;种子破皮后处理;发芽率;生长量

中图分类号 S72 文献标识码 A 文章编号 0517-6611(2016)05-058-02

Abstract[Objective]To research the effects of different treatments on seed germination and seedling growth of Ormosia semicastrata.[Method]With O. semicastrata seeds as the research material, effects of soaking method, disinfection method, treatment method after seed scarification and seedling substrate on the seed germination, seedling growth and biomass accumulation of O. semicastrata seeds were researched.[Result]Soaking in 75 ℃ hot water and sand hidden treatment after seed coat breaking extremely enhanced the germination rate of seeds, significantly promoted the seedling growth and biomass accumulation. K2MnO4 disinfection, substrate of fire clay and yellow soil mixture (1∶2) promoted seed germination rate, seedling growth and synthesis of biomass accumulation.[Conclusion]This research provides technical support for the seed sowing propagation of O. semicastrata.

Key words Ormosia semicastrata; Treatment after seed coat breaking; Germination rate; Increment

软荚红豆(Ormosia semicastrata)属豆科(Leguminosae sp.)蝶形花亚科(Papilionoideae)红豆属(Ormosia G.Jacks.)常绿乔木,主要分布于海拔100~1 000 m的海南、广东、广西东部、福建东南部、江西南部等地[1]。该树种喜光,喜暖热气候,不耐寒,喜肥沃湿润土壤,不耐旱等。因软荚红豆枝叶繁茂,树冠开阔,是南方著名的观赏树种,常作为庭荫树、行道树;因其种子红色,可供装饰用,常被制作纪念品[1]。近年来该树种作为园林植物而被广泛种植,种苗需求量越来越大。目前国内对软荚红豆的研究主要集中于幼苗形态的鉴定[2]、种子萌发特征[3]及材性物理力学性质[4]的研究,而对软荚红豆萌发技术以及幼苗生理的研究较少。鉴于此,笔者分析软荚红豆不同种子处理措施对种子萌发、幼苗生长的影响,以期为软荚红豆播种繁殖提供技术支撑。

1 材料与方法

1.1 试验地概况

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