Efficiency of soil-applied ^(67)Zn-enriched fertiliser across three consecutive crops  

作　　者：Edson M.MATTIELLO Eduardo L.CANCELLIER Rodrigo C.DA SILVA Fien DEGRYSE Roslyn BAIRD Mike J.MCLAUGHLIN 

机构地区：[1]Department of Soil Science,Universidade Federal de Viçosa,Viçosa,Minas Gerais(Brazil) [2]Department of Soil Science,Universidade Federal de Lavras,Minas Gerais(Brazil) [3]The University of Adelaide,School of Agriculture,Food and Wine,Fertiliser Technology Research Centre,PMB 1,Waite Campus,Glen Osmond SA 5064(Australia)

出　　处：《Pedosphere》2021年第4期531-537,共7页土壤圈（英文版）

基　　金：supported by funding from the Coordination for Scientific Support for Post-Doctoral Level Training (CAPES-BEX 1562/14-2),Brazil。

摘　　要：A very small amount of applied zinc(Zn) is taken up by crops, resulting in low recovery by plants. Adding elemental sulphur to zinc oxide(ZnO) fertiliser could improve Zn solubilisation and exert a higher residual effect on crops than soluble Zn sources. We produced an isotopically labelled Zn-elemental sulphur fertiliser and evaluated its performance in comparison to traditional Zn sources during sequential crop cultivation. Three ^(67)Zn-labelled fertilisers,ZnO, zinc sulphate(ZnSO_(4)), and ZnO co-granulated with elemental sulphur(ZnOS^(0)), were soil applied, and their contributions to the uptake of Zn by three consecutive crops, wheat, ryegrass, and corn, were assessed in a 294-d pot experiment. The contributions of Zn fertilisers followed the order: ZnSO_(4) > ZnO= ZnOS^(0). The relative contributions of Zn fertilisers were lower in the first crop than in the subsequent crops. The overall recovery of applied Zn by the three crops was higher for ZnSO_(4) than for ZnO and ZnOS^(0), reaching 1.56%, 0.45%, and 0.33% of the applied Zn, respectively. Zinc recovery by plants was very low, regardless of the source of Zn. Adding elemental sulphur to ZnO did not increase its effectiveness up to 294 d after application. Fertiliser contribution was higher for the subsequent crops than for the initial crop, indicating the importance of assessing the residual effects of Zn fertilisers.

关 键 词：agronomic biofortification elemental sulphur fertilizer residual effect plant uptake Zn bioavailability Zn fertilization Zn source 

分 类 号：S143.72[农业科学—肥料学]