scholarly journals Nitrogen, Phosphorus, and Potassium Requirements for Optimizing Growth and Flowering of the Nobile Dendrobium as a Potted Orchid

HortScience ◽  
2008 ◽  
Vol 43 (2) ◽  
pp. 328-332 ◽  
Author(s):  
Rebecca G. Bichsel ◽  
Terri W. Starman ◽  
Yin-Tung Wang
Keyword(s):  
Reproductive Development ◽  
Flower Number ◽  
N Application ◽  
Node Number ◽  
Number Of Leaves ◽  
Flowering Control ◽  
Phosphorus And Potassium ◽  
Fourth Experiment ◽  
Termination Time ◽  
Nitrogen Phosphorus

Experiments were conducted to determine how nitrogen (N), phosphorus (P), and potassium (K) rate and fertilizer termination time affect the growth and flowering of a Dendrobium nobile Lindl. hybrid, Dendrobium cv Red Emperor ‘Prince’. Nitrogen, P, and K were tested in separate experiments as a factorial combination of five rates and three termination dates (1 Sept., 1 Oct., and 1 Nov. 2005). Nitrogen and K rates were 0, 50, 100, 200, and 400 mg·L−1. Phosphorus rates were 0, 25, 50, 100, and 200 mg·L−1. Levels of the nutrients not being tested were held constant. For all nutrients, ending fertilization on 1 Sept. resulted in greater or similar pseudobulb thickness compared with ending fertilization on 1 Oct. or 1 Nov. Pseudobulbs grew taller as the N rate increased, peaking at 100 and 200 mg·L−1. There were interactions between the N rate and fertilizer termination time on all reproductive characteristics. For all fertilizer termination times, flower number increased once N was applied. When ended on 1 Nov., 200 and 400 mg·L−1 N caused a delay to reach anthesis. All P rates resulted in taller plants with equally more nodes when compared with 0 mg·L−1. As the K rate increased from 0 to 100 mg·L−1, plant height increased, with no further increase at higher rates. The number of leaves remaining increased as N and K rates increased up to 200 mg·L−1. Total flower number and flowering node number increased as the K rate increased to 100 mg·L−1 (terminated on 1 Sept.) or 50 mg·L−1 (terminated on 1 Oct. or 1 Nov.). In the fourth experiment, only N was ended at four termination times, whereas all other nutrients continued to be supplied until flowering. Control plants received all fertilizer elements until flowering. The duration of N application did not affect vegetative or flowering characteristics. No aerial shoots were observed as a result of prolonged application of N at all rates. In summary, 100 mg·L−1 N, 25 mg·L−1 P, and 100 mg·L−1 K are recommended for optimal vegetative growth and reproductive development of Dendrobium cv Red Emperor ‘Prince’.

scholarly journals Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

2019 ◽  
Vol 14 (3) ◽  
pp. 1 ◽  
Author(s):  
Narcísio Cabral de Araújo ◽  
Vera Lucia Antunes Lima ◽  
Jailton Garcia Ramos ◽  
Elysson Marcks Gonçalves Andrade ◽  
Geovani Soares de Lima ◽  
...  
Keyword(s):  
Human Urine ◽  
Dry Matter ◽  
Mineral Fertilizers ◽  
Fresh Matter ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Set Up ◽  
Cassava Wastewater ◽  
Nitrogen Phosphorus ◽  
Reduction Of Costs

Agricultural utilization of yellow waters associated with cassava wastewater is a sustainable technique, since it allows reduction of costs related to acquisition of industrialized fertilizers and minimizes the environmental pollution caused by the inadequate disposal of these effluents. In this context, this study evaluated the macronutrient macronutrient content and growth of cowpea fertigated with yellow water associated with cassava wastewater and NPK as source of nutrients. The experiment was set up in a greenhouse located at Campus I of the Federal University of Campina Grande. The experimental design was completely randomized, composed of five treatments characterized by: fertigation with mineral fertilizers, in the form of NPK; organic fertigation composed of human urine, cassava wastewater, human urine plus cassava wastewater; and organo-mineral fertigation composed of urine, cassava wastewater and mineral phosphorus, with four replicates. At 36 days after sowing, the following parameters were determined: contents of nitrogen, phosphorus, potassium, sulfur and the variables number of leaves, plant height, stem diameter, leaf area, shoot fresh matter and shoot dry matter. The use of yellow waters promotes significant increases for growth and production variables for nitrogen and potassium contents mainly, as well as for growth and production variables. The contents of nitrogen, phosphorus and potassium were higher than the levels considered as adequate for the cowpea crop. The use of human urine and cassava wastewater have potential to meet the needs for the main macronutrients required by cowpea and the irrigation via fertigation with these biofertilizers positively influences the development of cowpea.

scholarly journals RESPONSE OF DIFFERENT CUCUMBER HYBRIDS TO GRAFTING ON SQUASH ROOTSTOCK

2017 ◽  
Vol 48 (2) ◽  
Author(s):  
A. H. Abdul Razzaq
Keyword(s):  
Block Design ◽  
Total Yield ◽  
Dry Weight ◽  
Research Station ◽  
Cucurbita Moschata ◽  
Insertion Technique ◽  
Randomized Complete Block Design ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

A field experiment was conducted at Unifert Research Station Yousfiah Center of Iraq during spring of 2015 by grafting five cucumber hybrids named Mayadine, Ghazeer, Najim, Emparator and Beit Alpha on the rootstock ES101 (Cucurbita maxima x Cucurbita moschata) used the hole Insertion technique. The experiment content 10 treatments which were the grafted and ungrafted hybrids using randomized complete block design with three replications. The results showed that grafted Emparator (C4G) gave asignificans increase in the number of leaves (124.20 leaf.plant-1), leaf area (1.85 m2), chlorophyll leaf content (603.0 mg.100 g-1), plant dry weight (191.7 g.plant-1) and the amount of absorbed (nitrogen, phosphorus and potassium) by square area which were (17.77, 1.11 and 14.82 g.m-2, respectively). However, grafted Nagim (C3G) showed an increase in fruit count (14.03 fruit.plant-1), plant yield (1.53 kg.plant-1, early yield (10.60 ton.ha-1) and total yield (28.77 ton.ha-1).

Nutrient content, uptake and yield in African marigold (Tagetes erecta Linn) as influenced by pinching and foliar application of gibberellic acid

2015 ◽  
Vol 49 (6) ◽  
Author(s):  
Shalini Badge ◽  
D. M. Panchbhai ◽  
R. P. Gajbhiye
Keyword(s):  
Gibberellic Acid ◽  
Foliar Application ◽  
Nutrient Content ◽  
Flower Number ◽  
Yield Parameters ◽  
Flower Plant ◽  
African Marigold ◽  
Phosphorus And Potassium ◽  
And Control ◽  
Nitrogen Phosphorus

Present experiment was conducted at Main Garden of University, Akola, Department of Horticulture, Dr. Panjabrao Deshmukh Agriculture University, Akola during summer season of the years 2010-11 and 2011-12, to study the effect of pinching (No pinching, pinching at 15, 22, and 30 days after transplanting ) and foliar application of gibberellic acid (100 ppm, 200 ppm, 300 ppm and control) at 15<sup>th</sup> and 30<sup>th</sup> days after planting on NPK content and uptake by pinching and gibberellic acid spray. The results revealed that maximum nitrogen, phosphorus and potassium content and uptake as well as yield parameters <italic>viz</italic>., weight of flower, number of flower plant<sup>−1</sup>, yield of flower plant<sup>−1</sup> and hectare<sup>−1</sup> by African marigold plants were recorded by pinching at 15 days after transplanting and foliar application of gibberellic acid 300 ppm.

scholarly journals Nitrogen fertilization and glyphosate doses as growth regulators in Esmeralda grass

2019 ◽  
Vol 23 (12) ◽  
pp. 930-936 ◽  
Author(s):  
Raíssa P. D. Gazola ◽  
Salatiér Buzetti ◽  
Rodolfo de N. Gazola ◽  
Regina M. M. de Castilho ◽  
Marcelo C. M. Teixeira Filho ◽  
...  
Keyword(s):  
Block Design ◽  
N Fertilization ◽  
N Application ◽  
Foliar N ◽  
Leaf Chlorophyll ◽  
Randomized Block Design ◽  
Matter Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Main Factor

ABSTRACT Despite maintaining the green color in turfgrasses, nitrogen (N) fertilization affects shoot growth and, consequently, the frequency of cuts, the main factor in the costs of turfgrass maintenance. Therefore, this study aimed to evaluate N fertilization and the use of glyphosate as a growth regulator in Esmeralda grass (Zoysia japonica Steud.). The experiment was conducted in the field, from August 2014 to July 2015, using a randomized block design in a 5 x 4 factorial scheme with four repetitions and 20 treatments, namely: control (without N), 15 g m-2 of N in soil without foliar N; 30 g m-2 of N in soil without foliar N; 15 g m-2 of N in soil with foliar N (1% urea in 200 L ha-1) and 30 g m-2 of N in soil with foliar N combined with glyphosate doses (0, 200, 400 and 600 g ha-1 active ingredient (a.i.)). The N doses were split into five applications along the year. The following variables were evaluated: height, leaf chlorophyll index and foliar accumulation of nitrogen, phosphorus and potassium. Fertilization with 15 g m-2 of N in soil without foliar N application, split into five times along the year, was adequate for the turfgrass, while foliar fertilization did not promote benefits. The glyphosate dose of 400 g ha-1 a.i. was effective in reducing the growth of Esmeralda grass, without compromising its color and promoted less N, P and K accumulation in the leaves, reducing the height and dry matter production.

scholarly journals The use of biologically active substances in the composition of organic fertilizers in the cultivation of tomatoes in greenhouses

2020 ◽  
Vol 164 ◽  
pp. 06022
Author(s):  
Maria Selivanova ◽  
Timur Aysanov ◽  
Elena Romanenko ◽  
Elena Mironova ◽  
Natalia Esaulko ◽  
...  
Keyword(s):  
Biologically Active Substances ◽  
Biologically Active ◽  
Organic Fertilizers ◽  
Average Weight ◽  
Tomato Plants ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Average Plant ◽  
Nitrogen Phosphorus ◽  
Active Substances

The purpose of the research is to study the effect of biologically active substances in organic fertilizers on the productivity of tomato Sherami F1 in a winter greenhouse. The production experience was laid in a winter glazed greenhouse, which is located in the sixth light zone.The objects of research were cherry tomato plants Sherami F1, organic fertilizers 5AP, Maxifol Rutfarm, Nutrimir 4-4-10, Quick-Link. In the experiment, the average plant growth per week, the height of the plants, the number of leaves, the number of brushes collected and the average weight of the fetus, the chemical composition of the plants and yield were determined. The largest growth in a week and the tallest plants were obtained with Quick-Link; the most brushes collected and the largest fruits - when applying fertilizer 5AP. The use of organic fertilizers contributed to the better absorption of macronutrients by tomato plants from a nutrient solution: the content of nitrogen, phosphorus and potassium in the leaves and fruits increased relative to the control. When using biologically active substances in organomineral fertilizers, tomato productivity increased by 1.1-2.7 kg/m2 compared to the control, and the biochemical composition of the fruits improved.

scholarly journals Effect of Nitrogen, Phosphorus and Potassium Rates on Severity of Xanthomonas Leaf Spot of Schefflera

1990 ◽  
Vol 8 (2) ◽  
pp. 74-78 ◽  
Author(s):  
A.R. Chase
Keyword(s):  
Disease Severity ◽  
Leaf Spot ◽  
Xanthomonas Campestris ◽  
Nitrogen Rate ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Shoot Quality

Abstract Brassaia actinophylla plants were grown with various N-P-K regimes prior to inoculation with Xanthomonas campestris pv. hederae. Increased rates of N, P, and K reduced the number of lesions. The number of leaves, height, and shoot quality decreased as the nitrogen rate increased, but were not consistently affected by phosphorus or potassium rates. Severity of Xanthomonas leaf spot on Brassaia actinaphylla can be minimized with slight to moderate increased N, P, or K rates with N rate having the greatest impact on disease severity.

scholarly journals Respon Pertumbuhan Dan Hasil Tanaman Kacang Tanah terhadap Pemberian Berbagai Dosis POC Sabut Kelapa dan Batang Pisang di Lahan Rawa Lebak

2018 ◽  
Vol 8 (2) ◽  
pp. 659-666
Author(s):  
Ellisa Rusiani ◽  
Mahdiannoor Mahdiannoor ◽  
Farida Adriani
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Organic Fertilizer ◽  
Growth And Yield ◽  
Yield Response ◽  
Coconut Husk ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

       Peanuts is a herbs plants, its flowers like a butterfly and its pods at the underground. Production decrease of peanuts at the Hulu Sungai Utara Regency because chemical fertilizers are used excessively. It causes the soil isn’t loose, hard, and sour. Liquid organic fertilizer (LOF) of coconut husk and banana trunk have many nutrients like nitrogen, phosphorus, and potassium. This study aims to (i) determine the growth and yield response of peanut to the application liquid organic fertilizer of coconut husk and banana trunk on lebak wetlands, (ii) determine the best dosage liquid organic fertilizer of coconut husk and banana trunk growth and yield of peanut in lebak wetlands. It used a randomized block design (RBD). The results showed that application liquid organic fertilizer of coconut husk and banana trunk had significant effect on plant height and number of leaves age 28 day after planting (DAP) and no effect on plant height and number of leaves age 14 and 21 DAP, age of the plant when the first flowering, number of pods and plant fresh weight of pods. p3 (250 ml) was the best dosage to growth and yield of peanut.

Effects of Water-Nitrogen Interaction on Absorption, Translocation and Distribution of Nitrogen, Phosphorus, and Potassium in Rice

2010 ◽  
Vol 36 (4) ◽  
pp. 655-664 ◽  
Author(s):  
Yong-Jian SUN ◽  
Yuan-Yuan SUN ◽  
Xu-Yi LI ◽  
Rong-Ping ZHANG ◽  
Xiang GUO ◽  
...  
Keyword(s):  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

scholarly journals Effects of serpentinite fertilizer on the chemical properties and enzyme activity of young spruce soils

2016 ◽  
Vol 30 (4) ◽  
pp. 401-414 ◽  
Author(s):  
Ewa Błońska ◽  
Kazimierz Januszek ◽  
Stanisław Małek ◽  
Tomasz Wanic
Keyword(s):  
Enzyme Activity ◽  
Chemical Properties ◽  
Molar Ratio ◽  
Tree Roots ◽  
Forest Zone ◽  
Negative Effect ◽  
Phosphorus And Potassium ◽  
One Year ◽  
Nitrogen Phosphorus ◽  
Experimental Plots

AbstractThe experimental plots used in the study were located in the middle forest zone (elevation: 900-950 m a.s.l.) on two nappes of the flysch Carpathians in southern Poland. The aim of this study was to assess the effects of serpentinite in combination with nitrogen, phosphorus, and potassium fertilizers on selected chemical properties of the soil and activity of dehydrogenase and urease in the studied soils. All fertilizer treatments significantly enriched the tested soils in magnesium. The use of serpentinite as a fertilizer reduced the molar ratio of exchangeable calcium to magnesium, which facilitated the uptake of magnesium by tree roots due to competition between calcium and magnesium. After one year of fertilization on the Wisła experimental plot, the pH of the Ofh horizon increased, while the pH of the mineral horizons significantly decreased. Enrichment of serpentinite with nitrogen, phosphorus, and potassium fertilizers stimulated the dehydrogenase activity in the studied organic horizon. The lack of a negative effect of the serpentinite fertilizer on enzyme activity in the spruce stand soil showed that the concentrations of the heavy metals added to the soil were not high enough to be toxic and indicated the feasibility of using this fertilizer in forestry.

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