Effect of Alternate Bearing Phenomenon and Boron Foliar Application on Nitrogen-15 Uptake,Translocation and Distribution in Mango Tree(cv.Zebda)  

作　　者：Rawia El-Motaium Ayman Shaban El Sayed Badawy Ahmad Ibrahim 

机构地区：[1]Plant Researches Department,Nuclear Research Center,Atomic Energy Authority,Inshas,Cairo,13759,Egypt [2]Department of Pomology,Faculty of Agriculture,Cairo University,Giza,Cairo,12613,Egypt [3]Soil Science Department,Faculty of Agriculture,Cairo University,Giza,Cairo,12613,Egypt

出　　处：《Journal of Botanical Research》2023年第4期11-22,共12页植物研究（英文）

摘　　要：The objectives of this investigation are to study nitrogen uptake,translocation,accumulation and distribution in mango tree organs using labeled nitrogen(^(15)N)and to understand the mechanism of boron action in increasing fruit yield in the off-year.A field experiment was conducted using fifteen-year-old mango trees(cv.Zebda)grown at Al Malak Valley Farm,El-Sharkeya Governorate-Egypt.Treatments included the application of(^(15)NH4)2SO4,“in the on-year”,at a rate of 50 g nitrogen/tree through the stem injection technique.While boron was sprayed on the same trees“in the off-year”at the following rates:0.0(control),250 and 500 mg·L^(-1).The authors hypothesize that boron and nitrogen act synergistically to increase mango fruit yield in the off-year.Results indicated that the highest ^(15)N uptake and accumulation in the on and off-years was observed in the upper(young leaves).When boron was applied at 250 mg·L^(-1),in the off-year,the upper(young leaves)recorded the highest ^(15)N uptake and accumulation(%^(15)Ndff=13.93)relative to the other two leaf categories and those of the on-year.In the on-year fruit accumulated higher ^(15)N than leaf or bud.In the off-year,bud exhibited the highest ^(15)N accumulation without boron application,while leaves exhibited the highest ^(15)N with boron application.The highest%^(15)Ndff in all tree organs was observed at 250 mg·L^(-1) boron rate.Boron increased nitrogen uptake,translocation and accumulation in mango tree organs.A synergistic relationship was observed between boron and nitrogen which led to an increase in fruit yield in the off-year.

关 键 词：MANGO ^(15)N distribution ^(15)N-stem injection technique ^(15)N translocation ^(15)N uptake ^(15)N accumulation On and off-year Synergistic relationship 

分 类 号：TG1[金属学及工艺—金属学]