中国农业科学2011，Vol.44Issue(7)：1408-1414,7.DOI:10.3864/j.issn.0578-1752.2011.07.013
嘎啦苹果不同施肥深度对15N-尿素的吸收、分配与利用特性
Characteristics of Absorption, Distribution and Utilization of 15N-Urea Applied in Different Depths in Gala (Malus hupehensis)
摘要
Abstract
[Objective]The aim of the study is to provide a theoretical basis for the appropriate depth of fertilizer application for apple under field conditions.[Method]The isotope 15N-urea trials were carried out in field conditions with three different fertilizer application depth treatments.[Result]The difference of Ndffwas significant in different organs among different fertilizer application depth treatments, and the 0 cm and 40 cm treatments were obviously lower than 20 cm treatment.At the full-bloom stage,the Ndff was the highest in fine roots, and then in thick roots.During the shoot rapid-growing and fruit rapid-expanding stages, the Ndffofnew organs was higher than that of the storage organs.The Ndff of fruit was the highest at fruit maturity stage.After harvest,the Ndff of storage organs was higher and the new organs were in low level.The distribution ratio of 15N was different in various organs at different phonological stages, but there was no significant difference among three treatments.With the process of growth,the ratio of 15N utilization of apple trees in different treatments increased gradually and reached the highest after harvest, and the treatment of fertilizer in 20 cm was generally higher than that in 0 cm and in 40 cm treatments.[Conclusion]Fertilizer application in 20 cm can enhance the absorption and ability to transfer N to apple tree, and also can increase the nitrogen use efficiency.关键词
苹果/施肥深度/15N-尿素/吸收/分配/利用Key words
apple/ fertilization depth/ 15N-urea/ absorption/ distribution/ utilization引用本文复制引用
李红波,葛顺峰,姜远茂,彭福田,魏绍冲,房祥吉..嘎啦苹果不同施肥深度对15N-尿素的吸收、分配与利用特性[J].中国农业科学,2011,44(7):1408-1414,7.基金项目
现代苹果产业技术体系(MATS)、公益性行业(农业)科研专项(201103003)、山东省农业重大应用创新课题 （MATS）
