几种暖季型草坪草抗旱性的初步鉴定

以华东地区主栽草种矮生百慕达、马尼拉及天鹅绒为对照,利用生物学鉴定法对国产狗牙根、结缕草及假俭草优良选系或形态类型抗旱性加以初步鉴定。结果表明,狗牙根属抗旱性明显强于结缕划属和假俭草。C158和C021的抗旱性明显强于矮生百慕达,Z008的抗进性较天我绒强而较马尼拉略弱。红茎假俭草抗旱性明显强于绿茎假俭草。最后,对暖季型草坪草的永久萎蔫系数进行了讨论,并提出了表征永久萎蔫系数的概念。

The preliminary identification of several drought resistance warm-season turf grasses

Several fine drought resistance accessions of bermudagrass( Cynodon dactylon ), zoysiagrass( Zoysia ) and centipedegrass ( Eremochloa ophiuroides ) were identified by means of biological identification method compared with hybrid bermudagrass ("Tifdwarf")? manila grass( Zoysia matrella )and mascarene grass( Zoysia tenuiflora ) The drought resistance species, C 158 and C 021 , were obviously superior to the hybrid bermudagrass Z 008 performed much better under the serious drought compared to the mascarene grass, but a little worse compared with manila grass Centipedegrass with red stem was obviously stronger than that of centipedegrass accessions with green stem Finally, the permanent wilting coefficient was discussed and the concept "symptomatic permanent wilting coefficient" was proposed