Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (7): 1545-1556.doi: 10.16420/j.issn.0513-353x.2021-0280

• Research Notes • Previous Articles     Next Articles

Effects of Fertilizer Hole Application Sites on Fine Root Growth,15N Absorption and Utilization,Yield and Quality of Apple Trees

LIU Zhaoxia, ZHANG Xin, WANG Lu, MA Yuting, CHEN Qian, ZHU Zhanling, GE Shunfeng(), JIANG Yuanmao()   

  1. State Key Laboratory of Crop Biology,College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China
  • Received:2022-01-15 Revised:2022-02-25 Online:2022-07-25 Published:2022-07-29
  • Contact: GE Shunfeng,JIANG Yuanmao;


In order to clarify the reasonable fertilizer application site in apple production,realize the efficient utilization of nitrogen fertilizer. In 2018 and 2019,we studied the effects of hole application sites of organic and inorganic fertilizers in root zone(control without organic fertilizer application,strip furrow application and 1-4 hole application)on the root growth,15N uptake,utilization and loss,and fruit yield and quality of the 6-year-old‘Yanfu 3’/SH6/Malus robusta by using 15N isotope labeling technology. The results showed that among the treatments with increasing organic fertilizer,the chlorophyll content,leaf area and total dry weight of fine roots were the hightest in 3 and 4 hole fertilization treatments,and the lowest in strip furrow fertilization treatments. In the fruit ripening period,the Ndff values of leaves,fine roots,large roots and fruits were significantly increased by 3 and 4 hole fertilization compared with strip furrow fertilization. The utilization rate of 15N in trees was 3 holes > 4 holes > 2 holes > 1 hole > strip furrow > control. The loss rate of 15N showed an opposite trend to the utilization rate of 15N,fertilization in 3 and 4 holes was lower. Compared with the control and strip furrow fertilization treatments,the fruit yield,fruit weight and soluble sugar content of 3 and 4 hole fertilization treatments were significantly increased. It can be seen that under a certain condition of the amount of organic fertilizer(5 kg)combined with inorganic fertilizer,3 and 4 hole fertilization promoted the growth of fine roots,improved the uptake of 15N by trees,reduced nitrogen loss,and also had a positive effect on improving fruit yield and quality.

Key words: apple, fertilizer, site of hole application, fine root, utilization of 15N, yield, quality

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