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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (8): 1868-1880.doi: 10.16420/j.issn.0513-353x.2023-0579

• Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Effect of‘Yanfu 3’Apple Grafted with Different Rootstocks on Absorption and Utilization of 15N-urea

LI Xujiao1, LÜ Qi3, YAO Dongdong1, ZHAO Fengyun1, WANG Xiaofei2,*(), YU Kun1,*()   

  1. 1 Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps,Agricultural College,Shihezi University,Shihezi,Xinjiang 832000,China
    2 Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and Efficiency,State Key Laboratory of Crop Biology,College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China
    3 Xinjiang Agricultural Vocational and Technical College,Changji,Xinjiang 831100,China
  • Received:2024-04-09 Revised:2024-06-21 Online:2024-08-25 Published:2024-08-21
  • Contact: WANG Xiaofei, YU Kun

Abstract:

Soils in Xinjiang are highly saline and poor in organic matter,with unsuitable rootstock grafting leading to yellowing and weakening of apple trees.‘Yanfu 3’apple grafted on Malus micromalus Makino,M. hupehensis Rehd.,and M. sievesii(Ledeb.)Roemer as test materials. The 15N isotope tracer technique was used to conduct the variations in biomass,root morphology(root length,root surface area,and root volume),15N uptake and utilisation,and soil residues among the grafting combination in using fruit tree hole storage bricks. As a whole,the biomass levels were in the order of M. micromalus Makino > M. hupehensis Rehd. > M. sievesii (Ledeb.)Roemer;the root-to-crown ratio was in the order of M. sieversii(Ledeb.)Roemer. > M. hupehensis Rehd. > M. micromalus Makino;the root morphologyof the three soil depths was in the order of M. micromalus Makino > M. hupehensis Rehd. > M. sieversii(Ledeb.)Roemer. M. micromalus Makino had the maximum Ndff and 15N partitioning in leaves,while M. sieversii(Ledeb.)Roemer had the maximum Ndff and 15N partitioning in roots. M. micromalus Makino were of maximum values in total plant N,15N uptake and 15N utilisation. In terms of soil 15N accumulation,the three rootstocks in the 0-45 cm soil layer showed the accumulation of 15N as M. sieversii(Ledeb.)Roemer > M. hupehensis Rehd. > M. micromalus Makino. In conclusion,among the three rootstocks,grafted plants of M. micromalus Makino had the greatest plant growth,greatest total plant N and plant 15N use efficiency,with less soil residue adapted to the saline soils in the Xinjiang region.

Key words: apple, rootstock, nitrogen absorption and utilization, fruit tree hole storage brick