Seasonal Variation of Nutritional Status of Olive Plants as Affected by Boron Concentration in Nutrient Solution

Abstract

Ten-year-old olive plants, (Olea europaea L.) cv. 'Chondrolia Chalkidikis,' were cultured under ambient conditions in 50 L plastic pots containing inert sand-perlite medium and irrigated for a period of 18 months with 50% Hoagland's nutrient solutions containing 0, 0.5, and 5.0 mg boron (B) L −1 . The highest B concentration in the leaves was observed during the period May-June, and declined afterwards. Potassium (K) concentration in the leaves was the lowest in winter, but reached the maximum during the period June-July. Conversely, calcium (Ca) and magnesium (Mg) concentrations increased during the period June-March of the following year. No differences in phosphorus (P), iron (Fe) and zinc (Zn) concentrations were recorded between the treatments. However, P concentration fluctuated from 0.1% to 0.3% D.M. (dry matter) during the year, showing many minima and maxima. Iron and manganese (Mn) concentrations increased gradually from January of the first year to January of the second year and declined afterwards. The highest Fe concentration was about 200 mg kg −1 (D.M.) while leaf Mn varied between 10-50 mg kg −1 (D.M.). Leaf nitrogen (N) concentration was more or less constant during the experiment. The −B and the +5.0 mg B L −1 treatments reduced significantly the percentage of perfect flowers and affected B concentration of inflorescences, as it was 3-4 times greater with 5.0 mg B L −1 in comparison with the control.

Morphophysiological response of young Frantoio olive tree under different fertilizer types in sierozem with surface drip irrigation

“…Loupassaki et al (2002), Dimassi et al (1999) andJordao et al (1999) have all reported that leaf Mg concentration of Greek and Portuguese olives were above 0.1%, which are highly similar to our data. Seasonal change of Mg concentration of olive leaves was reported to be in the range of 0.1-0.2% (Christos et al, 2005).…”

Efecto del portainjerto por aproximación en el estatus nutrimental del manzano ‘Brookfield Gala’

“…Mpelasoka et al (2003) mencionan que las variaciones en el contenido de K foliar pueden deberse a la capacidad de absorción de las raíces y variaciones en la incorporación de iones de K en el xilema y su translocación de la raíz hacia los brotes. Así también, esta deficiencia podría ser debido al antagonismo con el boro, como se reporta en olivo (Olea europea) (Chatzissavvidis et al, 2005).…”

“…La deficiencia o exceso de B suele reducir la carga de cosecha como se observó en la reducción del porcentaje de flores en olivo (Chatzissavvidis et al, 2005), además de la sincronización con la polinización. Los síntomas de exceso de boro se reflejan en el bajo vigor de los árboles, desarrollo retardado y reducción en el número y peso de los frutos (Reid y Fitzpatrick, 2009;Herrera-Rodríguez et al, 2010), así como la disminución de la clorofila en la hoja, alteración del metabolismo y la necrosis de los tejidos maduros (Reid et al, 2004;Paparnakis et al, 2013).…”

Comparative Vegetative, Nutritional and Anatomical Study of Two Almond Varieties Grafted on Bitter Almond and Nemaguard Peach Rootstocks

“…Rootstocks contribute significantly to the production of fruit orchids, thus it is very important to use suitable rootstocks for grafting commercial cultivars [1]. The rootstocks establish the environmental suitability of the tree and its effects can be identified on the health of trees, critical stages of trees, and the sensitivity of trees in relation to insects and pathogens [2,3]. The suitable rootstock contributes to optimal nutrient uptake, translocation and enables a reduction fertilizer application, lowering the risk of nutrient leaching and possible toxicity, without reducing fruit quality or yield [4,5].…”