耐铝性不同的狗牙根在酸性土壤上的生长差异

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。

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

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.