Effects of decreasing levels of n amendments on organic “granny smith” apple trees

von Bennewitz, Eduardo; Cooper, T.; Losak, T.; Hlusek, J.; Carrasco-Benavides, Marcos

Mostrar el registro sencillo de la publicación

dc.contributor.author	von Bennewitz, Eduardo
dc.contributor.author	Cooper, T.
dc.contributor.author	Losak, T.
dc.contributor.author	Hlusek, J.
dc.contributor.author	Carrasco-Benavides, Marcos
dc.date.accessioned	2017-09-26T19:09:12Z
dc.date.available	2017-09-26T19:09:12Z
dc.date.issued	2015
dc.identifier.uri	http://repositorio.ucm.cl/handle/ucm/209
dc.description.abstract	The effect of decreasing levels of organic N-fertilization on fruit production, mineral composition and fruit quality was evaluated in organically cultivated “Granny Smith” apples trees. Treatments included the application of decreasing levels of N fertilization (100 kg N ha-1, 75 kg N ha-1, 50 kg N ha-1 and 0 kg N ha-1 ) applied as fossilized red guano (50% of the total amount of N) and blood meal (50% of the total amount of N) to twelve years old Granny Smith apple trees. Yield was not affected by the treatments (yield ranged from 0.28 to 0.4 kg cm-2 SCSA). Fruit mineral concentration and ratios were not affected by treatments. Fruits showed low Ca concentrations (2.8 to 3.3 mg Ca 100 g-1 FW), high levels of K (118.6 to 130.1 mg K 100 g-1 FW) and high values for K+Mg/Ca (> 12) and K/Ca (> 30) ratios. Mineral concentration on leaves was not affected by treatments (normal concentrations for macro and microelements). Bitter pit was only detected after 60 days of storage (100 kg N ha-1 tree, 1.1 in a scale 1-4). Besides orchard nitrogen management, fruit mineral ratios and Ca foliar applications should be considered for managing fruit production and quality in organic apples.	es_CL
dc.language.iso	en	es_CL
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 Chile	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/cl/	*
dc.source	Journal of Soil Science and Plant Nutrition, 15(4), 979-990	es_CL
dc.subject	Malus domestica	es_CL
dc.subject	Physiological disorders	es_CL
dc.subject	Volcanic soils	es_CL
dc.subject	Ca	es_CL
dc.subject	Mg	es_CL
dc.subject	K	es_CL
dc.title	Effects of decreasing levels of n amendments on organic “granny smith” apple trees	es_CL
dc.type	Article	es_CL
dc.ucm.facultad	Facultad de Ciencias Agrarias y Forestales	es_CL
dc.ucm.indexacion	Scopus	es_CL
dc.ucm.indexacion	Isi	es_CL
dc.ucm.indexacion	Scielo	es_CL
dc.ucm.doi	dx.doi.org/10.4067/S0718-95162015005000068	es_CL