耐铝性不同的狗牙根在酸性土壤上的生长差异  

The Growth Difference of Cynodon dactylon Accessions of Different Aluminum Tolerance on Acidity Soil

作　　者：黄春琼[1] 刘国道[1] 陈振[1] HUANG Chunqiong;LIU Guodao;CHEN Zhen(Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China,Ministry of Agriculture and Rural Affairs,Haikou,Hainan 571101,China)

机构地区：[1]中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创制重点实验室

出　　处：《热带作物学报》2019年第11期2112-2118,共7页Chinese Journal of Tropical Crops

基　　金：中央级公益性科研院所基本科研业务费专项资金(No.1630032019004);农业部热带牧草种质资源保护项目;热带饲料作物与特色畜牧创新团队项目(No.1630032017031)

摘　　要：本研究将前期研究筛选出的5份耐铝及5份铝敏感狗牙根[Cynodon dactylon(L)Pers.]种植于酸性土壤上,通过测定叶色、株高、分枝数及坪用质量等指标,研究其在酸性土壤上的生长差异。结果表明:在酸性土壤上生长28 d后,除相对株高外,耐铝种质和铝敏感种质均存在显著或极显著差异,耐铝种质生长受抑制程度较小,而敏铝种质受抑制程度较大;耐铝种质在酸性土壤上可以保持较高的生长速率。本研究结果将为后续开展狗牙根的耐铝机理研究及耐铝品种的培育提供可靠的材料。Five Al-tolerance and five Al-sensitive Cynodon dactylon(L)Pers.accessions respectively selected based on the preliminary study were planted in acidity soil.The growth index of the leaf color,turf high,number of tiller,and turf quality were assessed after growing in acidity soil for 28 days in order to study the growth difference of C.dactylon accessions.The results showed that Al-tolerance and Al-sensitive C.dactylon accessions were significantly different except turf height.The growth of Al-tolerance accessions was less inhibited than the Al-sensitive accessions.Al-tolerance accessions could maintain high growth rate in acidity soil.The results of the study would provide reliable materials for the follow-up study on the mechanism of aluminum resistance and the breeding of aluminum resistant varieties of C.dactylon.

关 键 词：狗牙根 酸性土壤 生长差异 

分 类 号：S543[农业科学—作物学]