CN115136802A - 一种利用叶子繁殖泡桐的育苗方法 - Google Patents
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Abstract
本发明公开了一种利用叶子繁殖泡桐的育苗方法,研究得到优株泡桐快速获得大量苗木育苗关键方法,首次通过叶片作为泡桐优树材料的快速无性繁殖,从而提高苗木繁殖速度,降低泡桐组培苗的培育成本,为泡桐资源的保存和优良无性系的选育所需大量苗木的快速繁育提供了技术保障。
Description
【技术领域】
本发明属于植物组织培养技术领域,具体涉及一种利用叶子繁殖泡桐的育苗方法。
【背景技术】
泡桐为玄参科(Scrophulariaceae)泡桐属(Paulownia)植物,是一种落叶乔木,原产我国,我国25个省、市、自治区都有栽植,是我国栽培历史十分悠久的速生用材树种之一。泡桐全身是宝,泡桐叶、花、果和树皮均入药,具有消炎、止咳和利尿等功效,泡桐叶、花还可以用饲料;泡桐木材也有诸多优点,其质轻、易加工、色浅、色泽自然、声学性能好,且耐火性强、耐腐蚀、耐酸碱、耐磨损、不易劈裂和不易虫蛀等,可以用于制作乐器、航空、舰船模型、胶合板、礼盒等,工业上广泛用于造纸、人造板等;泡桐成树后花多、树冠美、空气净化能力强,广泛用作城镇绿化、观光树种。由于泡桐具有很高的生态、社会和经济效益,在我国大规模的生产种植,据统计我国现有泡桐资源约10亿株,同时在全球多个国家进行规模化种植。
我国是全球第二大木材消费国和第一大木材进口国,目前木材市场需求仍在持续增长,木材供给不足是我国迫切需要解决的重大问题。其中泡桐作为当前我国最速生的用材树种新品种之一,可以很好的补充国家木材缺乏、促进经济发展。对于泡桐的繁育方法,已有相关的研究,例如中国专利申请号CN201710305685.4一种结合瓶外生根技术的泡桐组培快繁方法,包括外植体处理、初始芽诱导培养、继代芽增殖培养、育苗基质准备、继代芽移植和移植后管理;选取生长健壮无病虫害的泡桐半木质化枝条,对枝条进行修剪成茎段作为外植体,对外植体灭菌消毒处理后接种于初始芽诱导培养基中获取初始芽,再将初始芽接种于继代培养基中后得到组培继代芽,单个切下生长健壮,高度≥2.5cm的继代芽移植于育苗基质中,经过移植后管理得到泡桐苗木,该发明方法简单可行,简化了流程,缩短了育苗周期,从初始芽诱导至苗木移植后成活最短45天即可实现,加快了苗木培育的速度。
泡桐起初常用繁殖方式采用种子播种育苗,但是种子萌芽率低且个体间分化严重,易出现品种杂、低产株和植株弱等现象;随后,泡桐繁育方式采用根插育苗,但是根段不易采集,繁殖材料有限且根萌芽时间不一致,繁殖系数不高,难以进行规模化生产;再后来为保证泡桐植株的和产出稳定遗传,采用组织培养方式进行育苗,从而获得大量优良脱毒苗木,但是生产上完全使用组培快繁技术,要经过诸多工序、过程复杂和育苗成本较高。
【发明内容】
针对现有技术中传统组培快繁技术中过程复杂、周期长、成本高等不足,本发明的目的在于提供一种利用叶子繁殖泡桐的育苗方法,是一种利用泡桐叶子生根再诱导茎叶成苗育苗方法,研究得到优株泡桐快速获得大量苗木育苗关键方法,首次通过叶片作为泡桐优树材料的快速无性繁殖,从而提高苗木繁殖速度,降低泡桐组培苗的培育成本,为泡桐资源的保存和优良无性系的选育所需大量苗木的快速繁育提供了技术保障。
本发明的目的通过以下技术方案实现:
一种利用叶子繁殖泡桐的育苗方法,包括如下步骤:
1)插穗选择:选择栽培2个月的杂交泡桐组培苗的树苗,切下带叶柄的嫩叶作为插穗,采穗时间为4-5月;
2)插穗扦插生根:将叶柄基部切口斜削,将上步骤得到的插穗浸泡在2‰高锰酸钾溶液中进行消毒处理,插穗基部速蘸生根剂,扦插时扦插深度控制在5-8cm,扦插在50孔林木育秧盘中,扦插基质为按照1:1的体积比的黄土、泥炭,75%遮阴网遮阴20天后改为50%遮阴网遮阴,湿度75-85%,20天开始生根,30天生根率80-90%;
所述的生根剂的配方:2,4-二氯苯氧乙酸10-50mg/L、1.6%胺鲜酯0.05-4.0mg/L、磷酸氢二钾50-100mg/L和乙酰水杨酸0.5-3.0mg/L,用滑石粉配制成糊状;
3)泡桐根萌发成苗:40天后淋诱芽药剂,自然全光照湿度60-70%,30-45天泡桐根萌发成苗,30天萌芽率70%-90%,到60天泡桐苗长到30cm就出圃;
所述的诱芽药剂配方:噻苯隆0.05-0.5mg/L、磷酸氢二钾20-50mg/L、1000倍代森锰锌。
本发明中:
步骤2)所述的浸泡在2‰高锰酸钾溶液中进行消毒处理,时间5-10min。
步骤2)所述的生根剂的配方优选2,4-二氯苯氧乙酸50mg/L、1.6%胺鲜酯3.0mg/L、磷酸氢二钾50mg/L和乙酰水杨酸2.0mg/L,用滑石粉配制成糊状。
和现有技术相比,本发明具有如下优点:
1、本发明所述的一种利用叶子繁殖泡桐的育苗方法,首次通过叶片作为泡桐优树材料的快速无性繁殖,从而提高苗木繁殖速度,降低泡桐组培苗的培育成本,为泡桐资源的保存和优良无性系的选育所需大量苗木的快速繁育提供了技术保障。
2、本发明所述的一种利用叶子繁殖泡桐的育苗方法,首次在泡桐生根剂加入乙酰水杨酸,其中乙酰水杨酸可以有效促进泡桐生根,以2.0mg/L的乙酰水杨酸效果最佳。本发明首次筛选出了适宜泡桐叶片扦插的生根剂,最佳表现的生根剂配方为2,4-二氯苯氧乙酸50mg/L、1.6%胺鲜酯3.0mg/L、磷酸氢二钾50mg/L和乙酰水杨酸2.0mg/L,泡桐叶片扦插时使用该生根剂,能有效提高生根率,促进根系的生长,为实现泡桐的扦插快繁和推广应用提供了技术支撑。
【附图说明】
图1是本发明实施例1的泡桐带叶柄的嫩叶作插穗入基质生根图;
图2是本发明实施例1的泡桐插穗扦插生根图;
图3是本发明实施例1的泡桐根萌发成苗图;
图4是本发明实施例1的泡桐根萌发成苗出圃图。
【具体实施方式】
以下结合实施例对本发明的具体实施方式做进一步说明。
实施例1:
一种利用叶子繁殖泡桐的育苗方法,包括如下步骤:
1)插穗选择:选择栽培2个月的杂交泡桐组培苗的树苗,切下带叶柄的嫩叶作为插穗,采穗时间为4-5月;
2)插穗扦插生根:将叶柄基部切口斜削,将上步骤得到的插穗浸泡在2‰高锰酸钾溶液中进行消毒处理,时间5-10min,插穗基部速蘸生根剂,扦插时扦插深度控制在5-8cm,扦插在50孔林木育秧盘中,扦插基质为按照1:1的体积比的黄土、泥炭,75%遮阴网遮阴20天后改为50%遮阴网遮阴,湿度75-85%,20天开始生根,30天生根率80-90%;
所述的生根剂的配方:2,4-二氯苯氧乙酸50mg/L、1.6%胺鲜酯3.0mg/L、磷酸氢二钾50mg/L和乙酰水杨酸2.0mg/L,用滑石粉配制成糊状;
3)泡桐根萌发成苗:40天后淋诱芽药剂,自然全光照湿度60-70%,30-45天泡桐根萌发成苗,30天萌芽率70-90%,到60天泡桐苗长到30cm就出圃;
所述的诱芽药剂配方:噻苯隆0.3mg/L、磷酸氢二钾50mg/L、1000倍代森锰锌。
图1是实施例1的泡桐带叶柄的嫩叶作插穗入基质生根图(A是泡桐带叶柄的嫩叶作插穗在育苗盘扦插培养的图;B是泡桐带叶柄的嫩叶作插穗入基质生根图);
图2是实施例1的泡桐插穗扦插生根图(A是泡桐插穗在育苗袋扦插培养图;B是单个泡桐插穗扦插生根的图);
图3是实施例1的泡桐根萌发成苗图(A是泡桐根萌发在育苗袋培养成苗图;B是泡桐根萌发成苗植株整体图);
图4是实施例1的泡桐根萌发成苗出圃图(A是泡桐根萌发成苗在网棚培养出圃图;B是泡桐根萌发成苗的植株图)。
实施例2:
一种利用叶子繁殖泡桐的育苗方法,包括如下步骤:
1)插穗选择:选择栽培2个月的杂交泡桐组培苗的树苗,切下带叶柄的嫩叶作为插穗,采穗时间为4-5月;
2)插穗扦插生根:将叶柄基部切口斜削,将上步骤得到的插穗浸泡在2‰高锰酸钾溶液中进行消毒处理,时间5-10min,插穗基部速蘸生根剂,扦插时扦插深度控制在5-8cm,扦插在50孔林木育秧盘中,扦插基质为按照1:1的体积比的黄土、泥炭,75%遮阴网遮阴20天后改为50%遮阴网遮阴,湿度75-85%,20天开始生根,30天生根率80-90%;
所述的生根剂的配方:2,4-二氯苯氧乙酸10mg/L、1.6%胺鲜酯4.0mg/L、磷酸氢二钾70mg/L和乙酰水杨酸0.5mg/L,用滑石粉配制成糊状;
3)泡桐根萌发成苗:40天后淋诱芽药剂,自然全光照湿度60-70%,30-45天泡桐根萌发成苗,30天萌芽率70-90%,到60天泡桐苗长到30cm就出圃;
所述的诱芽药剂配方:噻苯隆0.5mg/L、磷酸氢二钾30mg/L、1000倍代森锰锌。
实施例3:
一种利用叶子繁殖泡桐的育苗方法,包括如下步骤:
1)插穗选择:选择栽培2个月的杂交泡桐组培苗的树苗,切下带叶柄的嫩叶作为插穗,采穗时间为4-5月;
2)插穗扦插生根:将叶柄基部切口斜削,将上步骤得到的插穗浸泡在2‰高锰酸钾溶液中进行消毒处理,时间5-10min,插穗基部速蘸生根剂,扦插时扦插深度控制在5-8cm,扦插在50孔林木育秧盘中,扦插基质为按照1:1的体积比的黄土、泥炭,75%遮阴网遮阴20天后改为50%遮阴网遮阴,湿度75-85%,20天开始生根,30天生根率80-90%;
所述的生根剂的配方:2,4-二氯苯氧乙酸30mg/L、1.6%胺鲜酯0.05mg/L、磷酸氢二钾100mg/L和乙酰水杨酸3.0mg/L,用滑石粉配制成糊状;
3)泡桐根萌发成苗:40天后淋诱芽药剂,自然全光照湿度60-70%,30-45天泡桐根萌发成苗,30天萌芽率70-90%,到60天泡桐苗长到30cm就出圃;
所述的诱芽药剂配方:噻苯隆0.05mg/L、磷酸氢二钾20mg/L、1000倍代森锰锌。
实验例
表1泡桐带叶柄叶片插穗诱导生根数据表
结果与总结:
1、本发明所使用的生根剂,实验处理1-6的效果较好,试验30天生根率达到86.21-95.68%、生根数达到5.26-8.89条,其中的实验处理5使用50mg/L的2,4-二氯苯氧乙酸、3.0mg/L的1.6%胺鲜酯、50mg/L的磷酸氢二钾和2.0mg/L的乙酰水杨酸作为诱导试剂,泡桐插穗生根率和生根数最佳,试验30天生根率达到95.68%,生根数达到8.89条/插穗。
2、实验处理7和实验处理1-6的比较,在缺少乙酰水杨酸时,30天生根率下降至83.35%,生根数下降至5.03,说明乙酰水杨酸可以有效的提升生根率和生根数,影响显著。
3、实验处理8、9、10和实验处理1-6的比较,使用配方中的两种或者一种成分进行生根诱导,30天生根率下降至80%以下,生根数下降至4.7以下,效果较差,不建议使用。
以上所述仅为本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,做出若干改进和变化,这些都属于本发明的保护范围。
Claims (3)
1.一种利用叶子繁殖泡桐的育苗方法,其特征在于:包括如下步骤:
1)插穗选择:选择栽培2个月的杂交泡桐组培苗的树苗,切下带叶柄的嫩叶作为插穗,采穗时间为4-5月;
2)插穗扦插生根:将叶柄基部切口斜削,将上步骤得到的插穗浸泡在2‰高锰酸钾溶液中进行消毒处理,插穗基部速蘸生根剂,扦插时扦插深度控制在5-8cm,扦插在50孔林木育秧盘中,扦插基质为按照1:1的体积比的黄土、泥炭,75%遮阴网遮阴20天后改为50%遮阴网遮阴,湿度75-85%,20天开始生根,30天生根率80-90%;
所述的生根剂的配方:2,4-二氯苯氧乙酸10-50mg/L、1.6%胺鲜酯0.05-4.0mg/L、磷酸氢二钾50-100mg/L和乙酰水杨酸0.5-3.0mg/L,用滑石粉配制成糊状;
3)泡桐根萌发成苗:40天后淋诱芽药剂,自然全光照湿度60-70%,30-45天泡桐根萌发成苗,30天萌芽率70%-90%,到60天泡桐苗长到30cm就出圃;
所述的诱芽药剂配方:噻苯隆0.05-0.5mg/L、磷酸氢二钾20-50mg/L、1000倍代森锰锌。
2.根据权利要求1所述的一种利用叶子繁殖泡桐的育苗方法,其特征在于:步骤2)所述的浸泡在2‰高锰酸钾溶液中进行消毒处理,时间5-10min。
3.根据权利要求1所述的一种利用叶子繁殖泡桐的育苗方法,其特征在于:步骤2)所述的生根剂的配方是2,4-二氯苯氧乙酸50mg/L、1.6%胺鲜酯3.0mg/L、磷酸氢二钾50mg/L和乙酰水杨酸2.0mg/L,用滑石粉配制成糊状。
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