Influence of Water-Nitrogen Coupling on Growth and 15 N Absorption and Utilization of Apple Saplings
Ren Yihua
Feng Yanguang
Chen Jianming
Jiang Han
Ge Shunfeng
Wei Shaochong
Jiang Yuanmao
Abstract：The effects of three nitrogen levels and three water levels under drip irrigation on the growth and 15 N absorption and utilization of apple saplings were studied in field using 15 N-labeled tracer method and with 2-year-old Red Fuji/Malus hupenensis as materials .The results showed that the shoot length , total dry matter quantity and 15 N absorption increased significantly with the increase of nitrogen fertilizer and water a-mount;and they were the highest under W3N3 treatment as 77.98 cm, 62.59 g, and 14.06 mg respectively, while the lowest under W1N1 treatment as 21.40 cm, 35.29 g and 3.55 mg respectively.The root activity, chlorophyll content and Ndff in organs increased significantly with the increase of nitrogen fertilizer and water amount .The use rate of 15 N increased significantly with the increase of water amount but decreased significant -ly with the increase of nitrogen fertilizer rate .The 15 N use rate was the highest as 20.0032% under W3N1 treatment, but was the lowest as 9.0382%under W1N3 treatment.
Keywords：AppleWater-nitrogen couplingGrowth15 NAbsorptionUtilization
Publication Date：2015-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 49-53 )