【摘要】 [目的]探讨自然低温条件下假俭草叶片中渗透调节物的变化及其与植物抗寒性的关系。[方法]以暖季型草坪草假俭草"翠绿1号"为试材,采用裂裂区设计,按钾肥、磷肥和多效唑3因素3水平组配27个处理组合对盆栽假俭草进行综合处理,比较不同处理组合对假俭草渗透调节物质的影响。[结果]在自然低温胁迫下,27个处理组合之间的假俭草叶片中渗透调节物质(可溶性糖和脯氨酸)含量的变化均达到了极显著性,在A2B2C2(即钾肥7.5 g/L、磷肥8.0 g/L、多效唑1.2 mg/L)处理下,假俭草的叶片细胞中渗透调节物质含量相对较高,可延缓植株衰老并延长草坪草的青绿期。[结论]在自然低温下,肥料和生长素的较优搭配能促进渗透调节物质在假俭草草坪草中的大量积累,为延缓假俭草冬季枯黄和提前返青提供保障。更多还原

【Abstract】 [Objective] The study aimed to discuss changes of osmotic adjustment substances in the leaves of Eremochloa ophiuroides(Munro.)Hack.at the natural low temperature and its relationship with the plant cold resistance.[Method] With the heat-season turf grass E.ophiuroides Cuilv 1 as tested material,it was comprehensively dealt with 27 treatment combinations by using the split-split plot design with 3 factors(potassium fertilizer,phosphate fertilizer and paclobutrazol) and 3 levels,and the effects of different treatment combinations on the osmotic adjustment substances of E.ophiuroides were compared.[Result] The changes of osmotic adjustment substances including contents of soluble sucrose and proline in the leaves of E.ophiuroides among 27 different treatments were all extremely significant under natural low temperature stress.The contents of osmotic adjustment substances in the leaf cells of E.ophiuroides were relatively high,which could delay the plant aging and extend the green period of turf grass under the treatment of A2B2C2(7.5 g/L potassium fertilizer,8.0 g/L phosphate fertilizer and 1.2 mg/L paclobutrazol).[Conclusion] At the natural temperature,the optimal combination on fertilizer and growth hormone could promote a large number of accumulation of osmotic adjustment substances in turf grass of E.ophiuroides which provided the guarantee for smoothly over winter.更多还原