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Magnesium-fortified phosphate fertilizers improve nutrient uptake and plant growth without reducing phosphorus availability

引用

pedosphere 2022年第5期32卷 744-751页

作者： Zhenya LU Yanyan WANG Fien DEGRYSE Chengdong HUANG Cuihong HOU Liangquan WU Rongfeng JIANG Michael J.MCLAUGHLIN Fusuo ZHANG College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil InteractionsMinistry of EducationChina Agricultural UniversityBeijing 100193(China) Department of pomology College of HorticultureChina Agricultural UniversityBeijing 100193(China) Fertilizer Technology Research Centre School of AgricultureFood and WineUniversity of AdelaidePMB 1Glen Osmond SA 5064(Australia) School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001(China) International Magnesium Institute Fujian Agriculture and Forestry UniversityFuzhou 350002(China)

Magnesium(Mg)deficiency can significantly limit crop yield and *** application of straight Mg fertilizer is unattractive because of additional labor ***,bulk blending Mg with other macronutrient fertilizers is also a suboptimal solution because bulk blended fertilizers often yield poor nutrient *** rapid and economical alternative to alleviating Mg deficiency is to co-granulate macronutrient fertilizers with ***,few commercial products have implemented this *** of the barriers hindering the production of Mg-fortified phosphorus(p)fertilizers is the assumption that precipitation of p with Mg will reduce p *** this study,four Mg compounds,anhydrous magnesium sulfate(MgSO_(4)),magnesium oxide(MgO),anhydrous magnesium chloride(MgCl_(2)),and dolomite(CaMg(CO_(3))_(2)),were co-granulated with mono-ammonium phosphate(MAp),and their granule strength,Mg and p availabilities,and agronomic effectiveness were *** showed that there were no significant differences in p solubility between Mg-fortified MAp and MAp treatments.X-ray diffraction(XRD)indicated that the Mg species after co-granulation were boussingaultite(Mg(NH_(4))_(2)(SO_(4))_(2)·6H_(2)O),schertelite(Mg(NH_(4))_(2)H_(2)(pO_(4))_(2)·4H_(2)O),magnesium hydrogen phosphate(Mg(H_(2)pO_(4))_(2)),and dolomite(CaMg(CO_(3))_(2)).A pot experiment using an acidic soil demonstrated an average 9.6-fold increase in shoot Mg uptake,3.0-fold increase in shoot p uptake,and 3.2-fold increase in soybean shoot dry matter in Mg-fortified MAp treatments,compared to those in MAp *** current study provides a simple,effective,and low-cost approach for the addition of Mg to macronutrient fertilizers,to minimize Mg deficiency.

关键词： agronomic effectiveness crop growth magnesium deficiency mono-ammonium phosphate macronutrient fertilizer p solubility X-ray diffraction(XRD)

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