摘要
在甘蔗的分蘖前期和伸长中前期对春植蔗桂糖 15号用 10 0 mg/L的乙烯利进行叶面喷施处理 ,结果表明 :分蘖前期喷施乙烯利的处理促进了甘蔗的生长 ,改善了经济性状 ,使分蘖和蔗茎伸长速度、茎长、茎径、单茎重及成茎率均有所提高 ,获得了较好的增产效果 ,同时提高了甘蔗的蔗糖分及品质。而伸长中前期喷施乙烯利的处理生长受抑制 ,茎长、茎径、单茎重均降低 ,从而产量较低 ,但其成茎率有所提高 ,蔗糖分明显提高 ,表现出明显的增糖和提高甘蔗品质的效果。此外 ,经乙烯利处理的甘蔗遇干旱时 ,有较强的抗旱性。在这两个乙烯利处理中 ,时期 I处理的抗旱性最强 ,产量也较高 。
Ethephon (100 mg/L) was sprayed at early tillering or booming elongation stage of spring-planted sugarcane variety GT15. The results showed that the treatment sprayed ethephon at early tillering stage promoted plant growth, which improved economic traits, so stalk length, stalk diameter, stalk weight and millable stalks were increased, and higher cane yield than the control was obtained . This treatment also increased sucrose content in cane and improved juice quality. The treatment sprayed ethephon at booming elongation stage showed slight inhibition on plant growth, so stalk length, stalk diameter, stalk weight and cane yield were decreased, but sucrose content in cane and juice quality were remarkably increased. Furthermore, both ethephon treatments showed stronger drought resistance than the control. As a result, the treatment sprayed ethephon at early tillering stage was the best based on both yield and drought resistance.
