坡岗地新植糖蔗氮磷钾养分最佳用量研究  

Studies on optimizing NPK rates for newly-planting sugarcane on hilly upland

作　　者：唐拴虎[1] 陈建生[1] 黄旭[1] 黄巧义[1] 解开治[1] 徐培智[1] 卢钰升[1] 李苹[1] 

机构地区：[1]广东省农科院土壤肥料研究所/广东省养分资源循环利用与耕地保育重点实验室,广东广州510640

出　　处：《广东农业科学》2010年第6期58-60,共3页Guangdong Agricultural Sciences

基　　金：国家科技支撑计划项目(2008BADA4B10);广东省科技计划项目(2009B020311002)

摘　　要：采用"3414"试验设计研究了坡岗地新植糖蔗氮、磷、钾养分适宜用量。结果表明,氮、磷、钾合理配施对坡岗地新植糖蔗产量形成具有重要影响,三要素中任何一种养分缺乏或供应不足均引起较严重减产。每公斤氮、磷、钾养分可生产商品蔗91.2～194.6、58.4～167.0kg和75.7～93.3kg,氮素吸收利用率为28.0%。回归分析表明,坡岗地新植糖蔗适宜氮、磷、钾养分比例为1∶0.35～0.4∶0.75～1.00,在砖红壤砂壤土上每667m2氮、磷、钾养分适宜用量分别为25～35、9～13kg和20～27kg;在砖红壤壤土上氮、磷、钾养分适宜用量分别为16～20、5～7kg和15～20kg。Field trials, adopting the ＂3414＂ design, were conducted to optimize NPK application rates for newly-planting sugarcane on hilly upland. The results illustrated that appropriate application of NPK fertilizers significantly influenced cane yields, lake or insufficiency of any one of the three nutrients obviously decreased yields. Each of 1kg N, P2O5 and K2O produced commercial cane respectively by 91.2～194.6, 58.4～167.0 and 75.7～93.3 kg, with fertilizer N use efficiency of 28.0%. Regression analyses concluded that rational proportion of N：P2O5：K2O should be 1： 0.35～0.4：0.75～1.00 for the upland cane, the appropriate application rates should be 25～35, 9～13 and 20～27 kg per 667 m2, respectively at sandy loam Latosol and 16～20, 5～7 and 15～20 kg per 667 m2, respectively at loam Latosol.

关 键 词：坡岗地 甘蔗 氮素 磷素 钾素 产量 

分 类 号：S147.2[农业科学—肥料学]