Leaching of applied phosphorus in container media
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Cited by (51)
Phosphorus restriction influences P efficiency and ornamental quality of poinsettia and chrysanthemum
2020, Scientia HorticulturaeCitation Excerpt :In addition to the initial substrate fertilization, a nutrient solution P concentration in the 30−60 mg L-1 range is recommended for many potted plants (Sonneveld and Voogt, 2009). As soilless media have a limited capacity to retain P (Marconi and Nelson, 1984), there is a high risk for leakage (Marconi and Nelson, 1984; Ku and Hershey, 1996, 1997; Ristvey et al., 2007). Several authors have suggested that P fertilization of ornamental plants could be reduced compared with recommendations (e.g. Ku and Hershey, 1996, 1997; Hansen et al., 1998; Frantz, 2013; Kim and Li, 2016).
Rosemary growth and nutrient balance: Leachate fertigation with leachates versus conventional fertigation
2018, Scientia HorticulturaeCitation Excerpt :Moreover, in soilless media a high percentage of N may be immobilized and denitrified by microorganisms (Scagel, 2003) or volatilized (Rathier and Frink, 1989). The increase of N and P leachate can be because the organic potting substrates have little NO3−-N and H2PO4–-P retention capacity, especially those that are pine bark or peat based (Marconi and Nelson, 1984). The range of leachate per plant for N (7–17 mg), P (4–12 mg), and K (47–60 mg), were different to those reported by Ristvey et al. (2007) who recorded runoff per plant for N (4–152 mg) and P (2–16 mg) in an experiment with different fertilizer rates being necessary to point out that these results are not directly comparable to ours due to container size and spacing differences.
Source-sink interactions lead to atypical reproductive stage phosphorus deficiency symptoms on the upper foliage of Capsicum annuum and Chrysanthemum ×morifolium
2018, Scientia HorticulturaeCitation Excerpt :Production of young plants (plug production) can benefit from low P fertilization (Nelson et al., 2012), but P restriction in long-term crops may lead to symptoms of P deficiency. This is especially true in greenhouse bedding crops that are grown in soilless substrate with limited phosphate holding capacity (Marconi and Nelson, 1984). Utilizing low fertilizer P concentrations (PCs) has become more prevalent in commercial greenhouse production, but has caused losses due to unsalable plants for some growers (Whipker, 2014).
Biochar from biosolids microwaved-pyrolysis: Characteristics and potential for use as growing media amendment
2018, Journal of Analytical and Applied PyrolysisCitation Excerpt :Yeager and Barrett have shown that as much as 80% of water soluble P fertilizer can be lost in leachate from growing media. P readily leaches from pine bark [46] and peat [47] based substrates owing to their low P fixation capacities. A number of mechanisms have been postulated for the adsorption of P to biochar: flocculation of P with cations added with biochar such as Ca and Mg [48] and binding of P to positively charged metal complexes formed on biochar surfaces [49,50].
A mathematical model for soil solute transfer into surface runoff as influenced by rainfall detachment
2016, Science of the Total EnvironmentCitation Excerpt :However, their loading from agricultural land threatens the quality and ecosystem of surface waters (Destouni et al., 2010). Even being considered rather immobile in many soils (Marconi and Nelson, 1984), phosphate can interact with soil particles in its changeable form known as orthophosphate (McBride, 1994; Sims et al., 1998). The soil acts as a sink that traps PO43 − from the soil solution (Sharpley et al., 1981, 1984; Sharpley, 1995; Mahananda et al., 2010).