Effects of Nitrogen Application Depth on Growth and Nitrogen Nutrition Status of Pear Trees
Sun Mingde
Wu Yang
Jiang Chunguang
Zhao Yanyan
Tian Haiqing
Liu Jun
Liu Songzhong
Abstract：Seven-year-old pear trees (Pyrus pyrifolia cv.Hwangkumbae) were treated to investigate the influences of nitrogen application depth (0,20 and 40 cm) on the growth of pear tree organs and nitrogen nutrition status in field.The results indicated that the organ biomass among different treatments had no significant differences.The nitrogen contents in middle and long shoot leaves,short shoots,two-year-old branches,fine and coarse roots and the total nitrogen contents in short shoots,middle and long shoots,fine and coarse roots and fruits were the highest in the 20-cm depth treatment,followed by 0-cm depth treatment,and were the lowest in the 40-cm depth treatment.The total nitrogen contents in vegetative,storage and reproductive organs of 20-cm depth treatment were the highest.Therefore,20-cm nitrogen application depth could effectively improve the nitrogen nutrition status in organs of pear trees;too shallow or too deep would not be conductive to the nitrogen absorption and accumulation of mature pear trees.
Keywords：Nitrogen application depthPear treeBiomassNitrogen contentTotal nitrogen content
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 60-63,69 )