中国农业科学2012，Vol.45Issue(19)：4025-4031,7.DOI:10.3864/j.issn.0578-1752.2012.19.014
等氮量分次追施对盆栽红富士苹果叶片衰老及15N-尿素吸收、利用特性的影响
Effect of Topdressing Nitrogen Application on Leaf Senescence and 15 N-Urea of Absorption, Distribution and Utilization in Potted ‘Fuji 'Apple
摘要
Abstract
[Objective] The aim of the experiment is to provide a theoretical basis for topdressing application in apple for delaying the leaf senescence. [Method] The effects on leaf senescence and the characteristics of absorption and utilization of potted two-year-old 'Fuji' apple/Malus hupenhensis in response to topdressing nitrogen were studied. [Result] Plant leaf area, SPAD and the total N content of leaves were obviously the highest in one-time topdressing application at full-bloom stage, and the lowest were found in three-time topdressing application. At flower bud differentiation stage, two-time topdressing application was the highest, and the lowest was in one-time topdressing application. At fruit maturity stage, three-time topdressing application were obviously the highest, while one-time topdressing application was the lowest. The leaf SOD, POD and CAT activities were obviously the highest in one-time topdressing application at full-bloom stage, the lowest were found in three-time topdressing application. At flower bud differentiation stage, two-time topdressing application was the highest, the lowest was in one-time topdressing application. At fruit maturity stage, three-time topdressing application was obviously the highest, while one-time topdressing application was the lowest. The Ndff value in different organs was significantly different and the value of three-time topdressing application was obviously higher than that of one or two-time topdressing at fruit maturity stage. Plant total nitrogen, 15N uptake and nitrogen ratio were the highest in three-time topdressing application fruit maturity stage. [ Conclusion] Three-time topdressing application not only enhanced the absorption and transfer ability to N in apple tree, delayed leaf senescence, but also increased the nitrogen efficiency.关键词
苹果/分次追肥/叶片衰老/15N-尿素/吸收/利用Key words
apple/topdressing application/leaf senescence/15N-urea/absorption/utilization引用本文复制引用
丁宁,姜远茂,彭福田,陈倩,王富林,周恩达..等氮量分次追施对盆栽红富士苹果叶片衰老及15N-尿素吸收、利用特性的影响[J].中国农业科学,2012,45(19):4025-4031,7.基金项目
现代农业产业技术体系建设专项资金(CARS-28)、国家公益性行业(农业)科研专项资金(201103003)、山东省农业重大应用创新课题(201009) （CARS-28）
