植物营养与肥料学报2012，Vol.18Issue(1)：139-145,7.
不同氮源对烤烟漂浮育苗氮素利用及烟苗生长的影响
Effects of nitrogen sources on nitrogen utilization and growth of flue-cured tobacco in the floating-seeding system
摘要
Abstract
The utilization of four different forms of nitrogen, NO3- -N, NH4＋ -N, （NH2） 2CO-N and NH4NO3, in the flue-cured tobacco floating-seeding system was studied. The results indicate that the highest N apparent utiliza- tion efficiency is in the NO3--N flue-cured tobacco floating-seeding system, and is followed by the （NH2 ）2CO-N, NH4NO3 and NH4＋ -N systems. The N actual utilization efficiency is in the order： NHnNO3 ≈ （NH2 ）2CO-N ≈ NO3- -N 〉 NH4＋ -N. Tobacco seedling indices, such as root activity, photosynthetic pigment content and degree of lignification in the NH4NO3 or （NH2 ）2CO-N systems are significantly higher than those in the NO~ -N systems. Therefore, urea plus a small quantity of NO3- -N could be an optimum selection of N source to improve the qualities of tobacco seedlings and economic fertilization in the floating-seedling system.关键词
烤烟/漂浮育苗/氮形态/氮素利用率Key words
flue-cured tobacco/floating-seeding system/nitrogen forms/nitrogen utilization efficiency分类
农业科技引用本文复制引用
张梦,梁永江,张长华,陈小明,杨宇虹,袁玲..不同氮源对烤烟漂浮育苗氮素利用及烟苗生长的影响[J].植物营养与肥料学报,2012,18(1):139-145,7.基金项目
贵州省烟草公司遵义市公司科技攻关项目(2007-01) （2007-01）
贵州省烟草公司科技攻关项目(2006-J04)资助. （2006-J04）
