Five-year-old 'Fuji'3/M26/M. hupehensis Rehd. seedlings were treated by 15N tracer to study the effects of fertilization depth (0, 20 and 40 cm) on 15N-urea absorption, distribution, utilization and loss in soil. The results showed that the plant leaf area, chlorophyll content and total N of apple
Seven-year-old 'Yanfu3'/M26/M. hupehensis Rehd. seedlings and 15N trace technique were used to explore the characteristics of 15N-urea absorption, utilization, loss and fruit yield and quality under different nitrogen application rates (N100, N200 and N300). The main results were as follows: the
In order to define the effects of fruit crop load on the distribution and utilization of carbon and nitrogen in dwarf apple trees, we conducted three crop load levels (High-crop load, 6 fruits per trunk cross-sectional area (cm2, TCA)), Medium-crop load (4 fruits cm-2 TCA), Low-crop load (2 fruits
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