干热胁迫下两种苇状羊茅对不同水肥处理的响应机理

草业学报 ›› 2011, Vol. 20 ›› Issue (1): 46-54.

干热胁迫下两种苇状羊茅对不同水肥处理的响应机理

刘晓军^1,3,洪光宇^1,2,袁志诚¹,文俊¹,罗勇¹,洪儒¹,杨烈^1*

1.安徽农业大学农学院,安徽合肥 230036;
2.内蒙古大学生命科学学院,内蒙古呼和浩特 010020;
3.上海世源屋顶绿化有限公司,上海 200240

出版日期:2011-02-22 发布日期:2011-02-22
通讯作者: E-mail:lyangya@yahoo.com.cn
作者简介:刘晓军(1987-),男,内蒙古海拉尔人,在读本科。
基金资助:
国家科技支撑计划(2009BADA6B06),安徽农业大学资助引进与稳定人才科研启动项目(yj2009-01)和安徽农业大学第七届科技创新课题(SPF09004)资助。

The response to different irrigation and fertilizer treatments of two tall fescues under heat and drought stress

LUO Yong¹, HONG Ru¹, YANG Lie¹

1.Agricultural College, Anhui Agricultural University, Hefei 230036, China;
2.Life Sciences College,
Inner Mongolia University, Hohhot 010020, China;
3.Green Roof Co., Ltd. Shanghai
World Source, Shanghai 200240, China

Online:2011-02-22 Published:2011-02-22

摘要/Abstract

摘要： 苇状羊茅是我国过渡区常用的四季常绿草坪草种,但在夏季苇状羊茅受到高温和干旱的双重胁迫。通过研究干热胁迫下不同灌溉与施肥管理措施对2种苇状羊茅品种火凤凰和科纳多的内部生理生化指标、外部形态学指标及草坪质量外观指标的影响,目的在于,1)分析灌溉和施肥管理对2个苇状羊毛品种对干热胁迫抗性的调控,2)通过该项实验筛选出适合在干热胁迫下不同品种的优化水肥管理措施。结果表明,1)不同组合水肥处理下的苇状羊茅2个品种,其抗逆性均有显著提升, MDA含量下降,火凤凰B1C1的MDA含量为16.461 μmol/g,火凤凰B2C2为20.386 μmol/g,POD活性升高,叶绿素含量上升,从科纳多对照的3.5813 mg/g提高到科纳多B1C1的5.206 7 mg/g。相对含水量提高,以外部形态而言,分蘖数和叶片数密度提高,适度的干旱胁迫提高了根冠比,浇水和施肥均能显著提高草坪质量。2)品种火凤凰的整体表现要优于科纳多,但差异均不显著。3)灌溉和施肥对干热胁迫下的苇状羊茅各项生理指标的影响均达到显著水平,但水肥间互作效应表现的并不显著。4)从水肥处理的结果来看,B1C1的组合,也就是每周浇水1次和每2周施肥1次,对苇状羊茅的综合抗性有提高调节作用,为最优水肥管理措施。5)苇状羊茅的不同品种对干热胁迫的适应性从地上部分和地下部分发生了分化,这对苇状羊茅的品种选育和夏季水肥管理有着重要的指导意义。

Abstract: Tall fescue is a popular turfgrass species used in Chinese transition zones but it suffers from both heat and drought stress in summer. A field study was conducted at Hefei, Anhui, in 2009, to 1) assess the effectiveness of irrigation and fertilizer treatments on regulation of drought/high temperature stress tolerances of two tall fescues (Fie phoenix and Coalnaduo), 2) determine the optimum fertilizer and irrigation treatments that result in the most drought resistance and persistence of turfgrasses. 1) The stress resistance of tall fescue under different irrigation and fertilizer treatments significantly improved, MDA contents decreased, POD activity increased, chlorophyll contents were raised, relative water contents increased, tillers and leaves per unit area were higher, and moderate irrigation improved root growth. In addition, visible turf qualities were upgraded with different fertilizer and irrigation treatments; 2) Almost all the resistances of Fie phoenix were better than those of Coalnaduo, but the differences were not significant; 3) Both irrigation and fertilization significantly improved stress resistant, but the interaction effect between irrigation and fertilization was not significant. 4) B1C1 was the optimal irrigation and fertilization culture to increase stress resistance in summer; 5) The resistant mechanism for adaption to high temperate and drought stress in summer, differed in the various varieties and was favored by breeding/selecting and culture management in summer.

中图分类号:

刘晓军,洪光宇,袁志诚,文俊,罗勇,洪儒,杨烈. 干热胁迫下两种苇状羊茅对不同水肥处理的响应机理[J]. 草业学报, 2011, 20(1): 46-54.

LUO Yong, HONG Ru, YANG Lie. The response to different irrigation and fertilizer treatments of two tall fescues under heat and drought stress[J]. Acta Prataculturae Sinica, 2011, 20(1): 46-54.

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