CAJ | 학술논문

【目的】研究玉米苗期抗旱性。【方法】选取7个玉米杂交种，待种子吸胀后，用质量浓度分别为0、100、150和200 g· L-1的聚乙二醇（ PEG）进行处理，模拟干旱，测定不同浓度PEG对玉米杂交种幼苗质量及保水性的影响。【结果和结论】PEG浓度是影响玉米杂交种幼苗保水性及幼苗质量的主要因素。随着PEG浓度的提高，玉米杂交种的幼苗长度显著降低，但幼苗质量和保水性显著提高。在较高PEG浓度下，农单5号、长城706和会单4号具有较强的抗旱性，海禾1号、农单5号和长城706具有较高的幼苗质量，即农单5号和长城706对较高浓度PEG具有较高的耐受能力。考查植物抗旱性时，不仅需要考查幼苗外观长势，还需考查幼苗质量及保水性。
【목적】연구옥미묘기항한성。【방법】선취7개옥미잡교충，대충자흡창후，용질량농도분별위0、100、150화200 g· L-1적취을이순（ PEG）진행처리，모의간한，측정불동농도PEG대옥미잡교충유묘질량급보수성적영향。【결과화결론】PEG농도시영향옥미잡교충유묘보수성급유묘질량적주요인소。수착PEG농도적제고，옥미잡교충적유묘장도현저강저，단유묘질량화보수성현저제고。재교고PEG농도하，농단5호、장성706화회단4호구유교강적항한성，해화1호、농단5호화장성706구유교고적유묘질량，즉농단5호화장성706대교고농도PEG구유교고적내수능력。고사식물항한성시，불부수요고사유묘외관장세，환수고사유묘질량급보수성。
Objective] To study the drought resistance of maize during the seedling stage .[Method]Seven maize hybrids were selected to test the effects of polyethylene glycol ( PEG ) concentrations on seedling quality and water retention of maize hybrid , with the PEG concentrations of 0 (CK), 100, 150 and 200 g· L-1 , under simulated drought condition , after the seeds imbibed .[Result and conclusion]The results indicated that PEG concentration was the most important factor to affect seedling quality and water retention of maize hybrid .With the increase of PEG concentration , seedling length of maize hybrid reduced significantly , while seedling quality and water retention increased significantly .Nongdan No .5 , Changcheng 706 and Huidan No.4 had strong drought resistance .Haihe No.1, Nongdan No.5 and Changcheng 706 had good seedling quality , so Nongdan No .5 and Changcheng 706 had the resistance to high PEG concentration .To study the drought resistance of plant , not only the seedling appearance , but also the seedling quality and water retention should be examined .