Soil temperature and plant growth stage influence nitrogen uptake and amino acid concentration of apple during early spring growth.

@article{Dong2001SoilTA,
  title={Soil temperature and plant growth stage influence nitrogen uptake and amino acid concentration of apple during early spring growth.},
  author={Shuting Dong and Carolyn F. Scagel and Lailiang Cheng and Leslie H. Fuchigami and Paul T. Rygiewicz},
  journal={Tree physiology},
  year={2001},
  volume={21 8},
  pages={
          541-7
        }
}
In spring, nitrogen (N) uptake by apple roots begins about 3 weeks after bud break. We used 1-year-old 'Fuji' Malus domestica Borkh on M26 bare-root apple trees to determine whether the onset of N uptake in spring is dependent solely on the growth stage of the plant or is a function of soil temperature. Five times during early season growth, N uptake and total amino acid concentration were measured in trees growing at aboveground day/night temperatures of 23/15 degrees C and belowground… CONTINUE READING

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