Journal
JOURNAL OF PLANT NUTRITION
Volume 35, Issue 10, Pages 1557-1571Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2012.689914
Keywords
total nitrogen concentration; apple organ; absorption of N-15-urea; distribution ratio; N-15-enriched method; phenological stage
Categories
Funding
- Agriculture Ministry of China, through National Apple Industry Technology System [CARS-28]
- 948 Apple Project [2011-Z24]
- Program for Agricultural Sci-Tech Innovation of Shaanxi Province [2011NXC01-18]
- West Light Foundation of CAS [2060299-14]
Ask authors/readers for more resources
Total nitrogen (N) concentration (N%), N derived from N-15-fertilizer (Ndff%), amount of N-15 uptake (ANU) in main organs (leaves, shoots, roots, fruits), and N use efficiency (NUE) were measured to assess N absorption, distribution, and utilization of Red Fuji apple trees across two years using a (15) N-enriched urea method. The N% in leaves and fruits decreased while those in shoots and roots increased in both years. The Ndff% and ANU in roots were highest at fruitlet stage than those in leaves, shoots and fruits at mature stages. This suggested that the absorbed N-15 by roots was redistributed to new organs. The N% was lower while Ndff% and ANU were greater in 2008 than 2007. The most N-15 absorbed was accumulated in the trunks, main and coarse roots and smaller in the fine roots and biennial branches. The NUE in 2007 and 2008 reached 9.9% and 12.2% respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available