2 are protogynous. Potassium and P are phloem-mobile macronutrients ( Marschner et al., 1996 ) that are readily translocated from leaves to developing pecan fruit ( Sparks, 1977 , 1988 ). Potassium functions in osmoregulation, carbohydrate
Abstract
When one searches the literature for information pertaining to the nutrition of woody ornamental plants it soon becomes obvious that there has not been too much published in this field. And most of the experimental work on the nutrition of trees has been concerned with varying combinations of nitrogen, phosphorus and potassium. Also, most of the work that is reported was done in the field, either to trees growing in the landscape or in nurseries and as a result most of the studies report a positive response only to the application of nitrogen and little or no response to the application of phosphorus or potassium. A brief review of some of the literature on fertilizer experiments is contained in the works of Wikle (18) and Himeleck (9). Since this symposium is concerned with potassium in horticulture, I will confine most of my remarks to the place that this mineral element has on the growth and development of woody ornamental plants.
–F ) Effect of nutrient solution (50% Hoagland’s) and vermicompost leachate (VCL) with or without nitrogen, phosphorus, or potassium on different growth parameters of greenhouse-grown tomato seedlings (n = 10). In each graph, bars with different letter(s) are
Polyhalite is a naturally occurring potassium, calcium, magnesium sulfate mineral with a chemical formula K 2 Ca 2 Mg(SO 4 ) 4 ·2(H 2 O) corresponding to 13.0% K, 13.3% Ca, 4.0% Mg, and 21.3% S. Many horticultural crops including potatoes ( Solanum
Pecan orchard profitability is potentially influenced by tree potassium (K) nutritional status with deficiency being common in commercial orchard operations, especially in years with heavy crop loads. The earliest visible symptom of K deficiency
–12,000 mm 3 , distributed up to 0.5 m deep, in response to different increasing doses of K ( Fig. 5 ). Fig. 5. Camu-camu root volume (measured in cubic millimeters) under potassium fertigation doses of 0 ( A ), 40 ( B ), 80 ( C ), 160 ( D ), and 320 ( E ) kg
current study concentrated on the importance of the macronutrients nitrogen, phosphorus, and potassium and their specific roles in flowering and fruit set of olive. Olive leaves and stems represent storage organs for N and release it in response to the
plant growth (Crafts-Brandner et al., 1998; Lemaître et al., 2008 ; Wingler et al., 2006 ). Phosphorus is a macronutrient of crucial importance in signaling, photosynthesis, and other metabolism ( Marschner, 1995 ). Potassium is an essential nutrient
soil phosphorus (P), potassium (K), and magnesium (Mg) concentrations in plots mulched with organic mulches or none, but we are unaware of any studies documenting the effects of above versus below mulch applications of fertilizers on soil nutrient
root and stolon development ( Pettit and Fagan, 1974 ). Potassium is second only to N in the amounts required to sustain turfgrass quality and growth. Various studies have focused on the importance of adequate K fertilization to maintain turfgrass