Mulches and Biosolids Affect Vigor, Yield and Leaf Nutrition of Fertigated High Density Apple
By G. Neilsen, E. Hogue, T. Forge, D. Neilsen. 2003
92 citations recorded by the source corpus.
'Spartan' apple (Malus xdomestica Borkh.) trees on M.9 (T337) rootstock were planted in April 1994 at 1.25 m x 3.5 m spacing. Seven soil management treatments were applied within a 2-m-wide strip centered on the tree row and arranged in a randomized complete-block experimental design. Treatments included a weed-free strip (check) maintained with four annual applications of glyphosate; surface application of 45 t.ha -1 of Greater Vancouver Regional District (GVRD) biosolids applied in 1994 and again in 1997; mulches of shredded office paper; alfalfa (Medicago sativa L.) hay; black woven polypropylene; and shredded paper applied over 45 t.ha -1 GVRD-and Kelowna-biosolids applied in 1994 and 1997. All experimental trees were fertigated with phosphorus (P) in the first year and with nitrogen (N) annually. Cumulative yield for the first five harvests was higher for trees subjected to any soil management treatment relative to check trees. Maximum cumulative yield, exceeding check trees by 80%, was measured for trees grown with a shredded paper mulch with or without biosolids application. Trees from the three shredded paper treatments were the only ones significantly larger than check trees after six growing seasons. No increases in leaf nutrient concentration were consistently associated with improved tree performance. Notable effects included increased leaf P concentration associated with biosolids application, increased leaf K concentration after alfalfa mulch application and temporary increases in leaf Zn and Cu concentration associated with application of biosolids high in Zn and Cu. Use of both mulches and biosolids amendments benefits growth of trees in high density plantings despite daily drip irrigation and annual fertigation.
Subfields: Nature and Landscape Conservation, Plant Science
View Paper: https://www.semanticscholar.org/paper/35776364eb23ac1785bfc443c62e9ab497355a85
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In Plant Science
Citations in the corpus
- Orchard floor management practices that maintain vegetative or biomass groundcover stimulate soil microbial activity and alter soil microbial community composition (2005, background): “Fruit-tree growth, fruit quality, and yields are also affected by GMS practices (Merwin and Stiles, 1994; Neilsen et al., 2003), but GMS effects on soil microbial communities around tree roots, and their implications for orchard productivity and sustainability are not well understood or…”
- Orchard floor management effects on nitrogen fertility and soil biological activity in a newly established organic apple orchard (2008, background): “yield and improve soil physical, chemical and biological properties (Forge et al. 2003; Neilsen et al. 2003; Oliveira and Merwin 2001; Sanchez et al. 2003; Yao et al. 2005).”