Effect of foliar application of nutrients and biostimulant on growth, phenology and yield attributes of pecan nut cv. 'Western Schley (original) (raw)
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African Journal of Agricultural Research, 2013
A field study on pecan nut (cv. Western Schley) was conducted in the experimental orchard of the Department of Fruit science, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan during the year 2008 to 2009. The study comprised of one experiment in which pecan trees under investigation were subjected to foliar spray of 0.5% urea, 0.1% boric acid, 0.5%, zinc sulphate, 5 ml/L supramino and their combinations. The results revealed that the foliar application of 0.5% urea, 0.1% boric acid, 0.5%, zinc sulphate and 5 ml/L supramino resulted in better nut quality in comparison to control. It was found that leaf nutrient contents (N, P, K, Ca and Mg) were also recorded maximum in trees treated with 0.5% urea+0.1% boric acid+0.5% zinc sulphate+5 ml/L supramino. Maximum leaf iron content was recorded in trees treated with 0.5% urea and 5 ml/L supramino whereas, trees sprayed with 0.5% urea, 0.1% boric acid, 0.5% zinc sulphate and 5 ml/L supramino was found to have highest l...
Enhancing Pecan Fruit Size and Nutrient Content through Foliar Application of Boron and Zinc
Islamic Azad University, Damghan Branch, Journal of Nuts, 2023
Pecan fruit, also known as pecan nut, is a type of nut that is popular for its rich, buttery flavor and crunchy texture. This research aimed to investigate the effects of spraying boric acid and zinc sulfate on the physical traits of pecan fruit in Erbil, Iraq. The experiment was conducted in the spring of 2022 using a completely randomized block design with three levels of boric acid (0, 1500, and 3000 mg l-1) and three levels of zinc sulfate (0, 2500, and 5000 mg l-1). The spraying was carried out before the flower buds opened, and at the time of harvesting, various physical characteristics of the fruit were measured, including length, width, weight, kernel weight, percentage of hull, percentage of shell, percentage of kernel, and absorption of elements in leaves and nuts. The results showed that spraying with boric acid (3000 mg l-1) and zinc sulfate (5000 mg l-1) had the greatest effect on increasing fruit length, while the fruit width was highest in the zinc treatment (5000 mg l-1), and it was significant compared to the control treatment. None of the treatments had a significant effect on fruit weight, kernel weight, percentage of shell, and percentage of hull skin. Moreover, the spraying significantly increased the amount of boron and zinc elements in leaves and nuts. Therefore, it can be concluded that spraying with boric acid and zinc sulfate can be an effective method to improve the physical characteristics of pecan nuts and increase the absorption of essential elements in leaves and nuts.
Nitrogen fertilization in pecan and its effect on leaf nutrient concentration, yield and nut quality
Revista Chapingo Serie Horticultura, 2020
Several studies indicate that nitrogen fertilization is one of the main constraints in obtaining higher yields and better nut quality in pecan (Carya illinoensis [Wangenh] K. Koch). Therefore, the aim of this research was to evaluate a single and split application of nitrogen in 'Western Schley' variety pecan, as well as its effect on leaf nutrient concentration, yield and nut quality. A randomized complete block design with six replicates was established. N doses were 100, 150 and 200 kg·ha-1; the single application was made in March and the split one in March and June. The leaf concentration of total N, P, K+, Ca2+, Mg2+, Fe2+, Mn2+, Zn2+ and Cu2+, yield (kg·tree-1), quality (nuts per kilogram and kernel percentage) and nitrogen use efficiency (NUE) were determined. Significant interaction between factors was detected for the Zn2+ concentration and the single applied dose of 200 kg·ha-1. With the single application of 100 kg·ha-1, the highest yield (44.60 kg·tree-1) and nu...
Ciência e Agrotecnologia, 2021
Carya illinoinensis (Wangenh.) K. Koch. is a deciduous fruit species with high economic impact and nutritional value that exhibits alternate bearing behavior. In this study, the concentration of foliar nutrients, non-structural carbohydrates and yield were evaluated in cultivar Western Schley pecan in response to the foliar application of gibberellic acid (50 mg L-1 GA3), prohexadione calcium (500 mg L-1 PCa) and thidiazuron (10 mg L-1 TDZ).The statistical analysis reveals that between agricultural cycles, the treatments showed no variation in the foliar concentration of nitrogen total (N-total), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), copper (Cu), manganese (Mn) and non-structural carbohydrates (fructose, glucose, sucrose and starch). However, the application of PCa showed no significant effect on the concentration of phosphorus (P) (1.5 and 1.9 g kg-1). On the other hand, the concentration of zinc (Zn) (27.0-60.1 mg kg-1) showed a significant difference between yea...
Fertilization Strategies In Pecan And Effects On Soil Properties And Plant Growth
Journal of Agriculture and Veterinary Science , 2017
The pecan (Carya illinoensis Koch) is a fruit species belonging to the group of walnuts, a member of the family Juglandaceae, the same of the common walnut (Juglans regia) that besides being part of the culinary culture of Middle Eastern and European countries, has highly nutritious properties. The objectives of this work were to compare organic amendment vermicompost, with inorganic solid fertilizer in two doses (F1and F2) and a control without fertilization, and their effects on soil properties and plant development (height and diameter) from December 2012 to February 2015. Soil pH and EC values were unaffected neither by year x treatment interaction effect nor by a treatment effect, even when pH values showed a very low variability among soil samples. EC showed a much higher variability between samples, especially at the latest season. Respect to plant growth the highest diameter was detected when an organic amendment or a high rate of a synthetic fertilizer were applied.The application of an organic amendment caused the highest levels of C and P in soils.
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Foliar sprays of growth regulators have commercial potential for improving the performance of some of the parameters associated with alternate bearing in pecan trees. The objective was to evaluate the behaviour of alternate bearing through analysis of seasonal variations in buds and leaflets of non-structural carbohydrates (glucose, fructose, sucrose, and starch), mineral nutrients (N-total, P, K+, Ca2+, Mg2+, Fe2+, Cu2+, Mn2+ and Zn2+), yield components (nut weight per kilogram and kernel percentage) and oxidative metabolism (superoxide dismutase, hydrogen peroxide, catalase, guaiacol peroxidase and antioxidant capacity) in cv. Wichita pecan trees in response to foliar applications of gibberellic acid (50 mg L−1), calcium prohexadione (500 mg L−1) or thidiazuron (10 mg L−1). The experiment was of a completely randomized experimental design with five replicates. Foliar growth regulator (GRs) sprays help maintain the concentration of non-structural carbohydrates in the leaflets and b...
Notulae Botanicae Horti Agrobotanici Cluj-Napoca
The pecan nut is produced in 57 countries in the world. Alternate bearing is one of the main biological problems that affect pecan cultivation. Mineral and organic fertilization is a good strategy to maintain and increase pecan nut production. In this study, several mineral and organic doses of fertilization were tested using a factorial arrangement 56 bounded to 25 treatments was used in structure Taguchi L25: nitrogen (N) 0 - 240 kg ha-1, phosphate (P2O5) 0 - 120 kg ha-1, potassium (K2O) 0 - 100 kg ha-1, calcium (CaO) 0 - 400 kg ha-1, liquid humus 0 - 3600 L ha-1 and solid humus 0 - 8000 kg ha-1. The study was carried out in Aldama city, Chihuahua (Mexico). An average yield of 2.4 t ha-1 was obtained, 157 nuts per kilogram and 58.9% of edible nut. The average alternate bearing intensity was 31.58%, and the long-term yield index (IRLP) was 9.59%. It is concluded that the factors whit the greatest impact on the analyzed variables were N and P2O5. In addition, it was found these mine...
Effects of Foliar Applications of Nitrogen, Boron and Zinc on Fruit Setting and Quality of Almonds
Acta Horticulturae, 2006
Fruit drop in orchards of almonds (prunus amygdalus L.) is one of the major problems encountered by producers of fruit in Iran. Nutritional elements, particularly nitrogen and boron, have an effective role in this issue. To study the effect of these elements, a factorial experiment was done based on randomized complete blocks with 18 applications and three repetitions-altogether, 108 8-year-old Azar trees were tested in the county of Shabestar during 2002 and 2003. The first factor was nitrogen supplied from a urea source in two levels (zero and 5000 ppm), the second factor was boron from a boric acid source in three levels (zero, 2000 ppm and 4000 ppm), and the third factor was zinc supplied by a source of zinc sulfate in three levels (zero, 2000 ppm and 4000 ppm). The highest percentage of fruit setting (24 percent) was measured at the third levels of boron and zinc. The highest final fruit setting percentage (15 percent) was obtained for second-and third-level boric acid. Also, the highest single kernel weight (2.4 grams) was measured for combined foliar application with 5000-ppm urea and 4000-ppm boric acid. The highest kernel percentage (14 percent), on the other hand, was achieved with third-level boron. The highest fruit length (4.4 centimeter) was also obtained for third-level boron. Furthermore, second-and third-levels of boric acid led to the highest fruit width (3.1 centimeter). The highest oil percentage measured (53 percent) was observed for third-level zinc without applying nitrogen. The highest hard shell percentage (22 percent) was obtained when combined foliar applications of secondlevel nitrogen and second-and third-level boric acid were used. On the other hand, the highest protein percentage (23 percent) was measured for the combined foliar application of urea and third-level boric acid. No significant simple or interactive year by location effects were obtained for any of the fertilization applications.
Folia Horticulturae
Pecan nut production is quite commonly limited by zinc (Zn) deficiency. Here, we evaluate the response in terms of the concentrations of non-structural carbohydrates, yield components, foliar nutrient levels and oxidative metabolism in young ‘Western Schley’ pecan nut trees in response to foliar applications of 200 mg · L−1 of Zn as one of the following: ZnSO4, Zn-EDTA, ZnO nanoparticles (NPs) or the proprietary product ‘nitrazinc’ (NZN) (the control). Across two consecutive growing seasons, the spraying of Zn in these various forms helped maintain the foliar concentrations of non-structural carbohydrates, foliar nutrients (total-N, Ca2+ and Mg2+) and the kernel percentage of nuts. Likewise, trees sprayed with ZnSO4 maintained the concentrations of Zn in the leaflets across seasons. On the other hand, Zn-EDTA decreased the concentration of chlorophyll and total carotenoids. In general, leaflets treated with ZnSO4, Zn-EDTA and ZnO NPs reduced their oxidative metabolism. Sources of Zn...