Effects of the Aqueous Extracts from Alfalfa on Seeds Germination and Seedling Growth of Cenchrus pauciflorus

doi:10.11733/j.issn.1007-0435.2016.06.017

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (6): 1272-1277.DOI: 10.11733/j.issn.1007-0435.2016.06.017

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Effects of the Aqueous Extracts from Alfalfa on Seeds Germination and Seedling Growth of Cenchrus pauciflorus

ZHOU Li-ye¹, WANG Ya-dong¹, REN Xiu-zhen¹, TIAN Xun²

1. College of Agronomy, Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028043, China;
2. School of Life Science, Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028043, China

Received:2015-10-12 Revised:2016-08-03 Online:2016-12-15 Published:2017-03-18

紫花苜蓿水浸提液对少花蒺藜草种子萌发的影响

周立业¹, 王亚东¹, 任秀珍¹, 田迅²

1. 内蒙古民族大学农学院, 内蒙古通辽 028043;
2. 内蒙古民族大学生命科学学院, 内蒙古通辽 028043

通讯作者: 任秀珍
作者简介:周立业(1969-),女,内蒙古乌兰察布市人,博士,主要从事草地生态方面的教学与科研,E-mail:toni2002@126.com
基金资助:
博士启动基金（BS235）；国家自然科学基金（31460634，31360574）资助

Abstract

Abstract:

In order to reveal the competitive mechanism between the perennial leguminous pastures and field sandbur (Cenchrus pauciflorus), alfalfa (Medicago sativa L) aqueous extract with different concentrations were used to this experiment on seed germination and seeding growth of field sandbur. The results showed that the allelopathy of different concentrations of aquatic extract from alfalfa had different effects on Cenchrus pauciflorus seeds' shoots and roots. The extracts from alfalfa stem and leaves had stronger allelopathic effects on seed germination and seeding growth of Cenchrus pauciflorus than extracts from alfalfa roots. Particularly, the effects on seed germination and seeding growth of Cenchrus pauciflorus was the most significant when the extract concentration was 0.1 g·mL^-1 from Alfalfa shoots. Seed germination rate was only 51.12%, 44% less than the control. The seed germination index was only 16.37 and declined by 35.37% compared with control group. With germination time going, the inhibition effects on roots of Cenchrus pauciflorus were stronger than the effects on shoots. The Malondialdehyde content of Cenchrus pauciflorus seedlings treated with extract of were higher than the control, and the MAD contents increased with the increase of the extract concentration. Alfalfa shoots had strong allelopathic effects on cenchrus pauciflorus. It is determined preliminarily that alfalfa could be used as alternative plants to control Cenchrus pauciflorus spreading.

Key words: Allelopathy, Aqueous extract, Alfalfa, Cenchrus pauciflorus Benth.

摘要：

为了解替代牧草对少花蒺藜草（Cenchrus pauciflorus Benth.）的竞争作用，测定了营养生长中期紫花苜蓿（Medicago sativa L.）根和茎叶水浸提液对少花蒺藜草种子萌发的化感效应。结果表明：紫花苜蓿2种浸提液各浓度对少花蒺藜草种子萌发均具有一定的化感作用，但作用强度和效应存在差异，其中紫花苜蓿茎叶浸提液对少花蒺藜草种子萌发的抑制作用强于根浸提液，以0.1 g·mL^-1紫花苜蓿茎叶浸提液对种子萌发的抑制效果最强，发芽率仅为51.12%，比对照低了44%；发芽指数为16.37，比对照降低了35.37%；随着发芽时间的延长，同浓度浸提液对少花蒺藜草胚根的抑制作用大于胚芽；浸提液处理过的少花蒺藜草幼苗中丙二醛（MDA）含量均高于对照，且随着浸提液浓度的提高MDA含量增大。初步确定紫花苜蓿可作为替代控制法防控少花蒺藜草的备选植物。

关键词: 化感效应, 水浸提液, 紫花苜蓿, 少花蒺藜草

CLC Number:

S459

ZHOU Li-ye, WANG Ya-dong, REN Xiu-zhen, TIAN Xun. Effects of the Aqueous Extracts from Alfalfa on Seeds Germination and Seedling Growth of Cenchrus pauciflorus[J]. Acta Agrestia Sinica, 2016, 24(6): 1272-1277.

周立业, 王亚东, 任秀珍, 田迅. 紫花苜蓿水浸提液对少花蒺藜草种子萌发的影响[J]. 草地学报, 2016, 24(6): 1272-1277.

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Effects of the Aqueous Extracts from Alfalfa on Seeds Germination and Seedling Growth of Cenchrus pauciflorus

紫花苜蓿水浸提液对少花蒺藜草种子萌发的影响

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