ELEMENTAL SULFUR IMPREGNATED WITH IRON AS A FERTILIZER SOURCE FOR KENTUCKY BLUEGRASS |
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Authors: | Ryan C Christensen Bryan G Hopkins Von D Jolley Kelly M Olson Christopher M Haskell Nicholas J Chariton |
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Institution: | Department of Plant and Wildlife Sciences , Brigham Young University , Provo , Utah , USA |
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Abstract: | Elemental sulfur (S) impregnated with Fe (S-Fe) fertilizer was evaluated on Kentucky bluegrass (KBG; Poa pratensis L.) in three glasshouse studies: (1) with/without Fe as S-Fe, ferrous sulfate (FS), or iron-ethylenediamine-N,N’-bis(2-hydroxyphenylacetic acid) (Fe-EDDHA) to soil (49 kg Fe ha?1), or foliar Fe-EDDHA (5 kg Fe ha?1) on two cultivars; (2) 0, 49, 197, or 592 kg Fe ha?1 of S-Fe deep mixed or surface mixed on two soils; (3) 0 or 49 kg Fe ha?1 applied as S-Fe on four cultivars. A field study comparing 0 and 49 kg Fe ha?1 applied as S-Fe to KBG was also conducted. Soil applied S-Fe was assimilated in shoots as efficiently as Fe-EDDHA applied to soil or foliage. Shoot Fe increased significantly with increasing S-Fe in a curvilinear response when deep mixed with soil and in a linear response when surface applied. However, no Fe source tested impacted yield or verdure in these studies. |
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Keywords: | iron sulfur elemental sulfur Kentucky bluegrass Poa pratensis turfgrass fertilizers nutrient uptake chlorosis chelate |
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