scholarly journals Potassium Fertilizer Effects of Potato Yield and Petiole Sap Potassium Concentrations

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 592e-592 ◽  
Author(s):  
Carl Rosen ◽  
Wenshan Wang ◽  
David Birong
Keyword(s):  
Management Strategies ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Potassium Nitrate ◽  
Potassium Fertilizer ◽  
Application Rates ◽  
Flame Emission ◽  
K Fertilizer ◽  
Effect On Yield ◽  
Petiole Sap

A 2-year field study was conducted on a low- to medium-K testing sandy soil 1) to evaluate the effects of various K management strategies on potato (cv. Russet Burbank) yield and quality and 2) to calibrate a petiole sap test for determining plant K status. Treatments included banded applications of potassium chloride fertilizer at planting with K ranging from 0 to 300 kg·ha–1 in 75 kg·ha–1 increments. Comparisons of preplant broadcast + banded applications and evaluation of in-season applications of potassium nitrate also were made. In both years, tuber yield increased with increasing banded K fertilizer up to 150 kg ha-1 K the first year and 225 kg ha-1 K the second year. In-season applications of potassium nitrate increased tissue K levels, but at equivalent K application rates, timing of K application had no effect on yield. Petiole K concentrations, measured on a dry weight and sap basis, increased with increasing K fertilizer application. Potassium concentrations in nondiluted sap determined with the Cardy K electrode were ≈200 to 2500 ppm lower than those determined by flame emission. The greatest discrepancy occurred at the higher K sap concentrations. Potassium concentrations determined with the Cardy electrode in sap diluted with aluminum sulfate or deionized water were much closer to those determined by flame emission. These results suggest that dilution of the sap is necessary to obtain accurate K concentrations in petiole sap.

Comparison of the effects of potassium fertilizer on the yield, potassium content and quality of 22 different vegetable and agricultural crops

1980 ◽  
Vol 95 (2) ◽  
pp. 441-456 ◽  
Author(s):  
D. J. Greenwood ◽  
T. J. Cleaver ◽  
Mary K. Turner ◽  
J. Hunt ◽  
K. B. Niendorf ◽  
...  
Keyword(s):  
Dry Matter ◽  
General Relation ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Optimum Level ◽  
Potassium Fertilizer ◽  
Plant Weight ◽  
K Fertilizer ◽  
P Fertilizer ◽  
The Difference

SUMMARYSixty-one experiments with 15 levels of K fertilizer in the presence of excess N and P fertilizer were carried out on adjacent sites of the same field. Yield was always related to level of K fertilizer by a ‘diminishing returns’ type curve, and a derived equation, which defined relative responsiveness in terms of a single parameter, fitted the data for each crop very satisfactorily. Although the responsiveness of many of the crops was similar there were marked differences and the optimum levels of K (defined as the level at which a further 10 kg/ha increased yield by 1%) varied from 0 to 360 kg/ha, depending on the crop. Responsiveness was largely independent of the plant family to which the crop belonged, but was related to the mean plant weight atharvest; the larger the weight the less reponsive the crop. No general relation existed between responsiveness and duration of growth.The % K in the dry matter of leaves (including stems) at harvest of crops receiving the optimum levels of K fertilizer was mainly determined by the family. It was generally between 0·9 and 1·1 for the Amaryllidaceae, between 1·1 and 1·2 for the Leguminosae and between 1·9 and 2·5% for the Cruciferae. The difference between the % K in the dry matter with the optimum level of K fertilizer and that with no fertilizer was proportional to responsiveness. Percentage K at harvest was a good indicator of the extent to which crop growth was restricted by lack of potassium.At harvest crops receiving the optimum levels of K fertilizer contained between 29 and 220 kg/ha of K, but uptake increased asymptotically to a maximum as K applications were raised to higher levels. Maximum uptake for nearly all crops was almost double the uptake with the optimum fertilizer application.Percentage recovery of 100 kg/ha of added K fertilizer varied between 8 and 70%, roughly in proportion to the total crop dry weight, which varied between 1 and 15 t/ha.Effects of level of K fertilizer on crop quality were also measured and over the practical range of applications the effects were generally small.The differences between the K requirements of crops are discussed and it is argued that the responsiveness of one crop relative to that of another would be expected to be similar on a range of soils.

scholarly journals Respon Pertumbuhan dan Hasil Garut (Maranta Arundinacea) Terhadap Pembumbunan dan Pemupukan Kalium

2017 ◽  
Vol 1 (1) ◽  
pp. 46
Author(s):  
Rahmawati Fitria ◽  
Supriyono Supriyono ◽  
Sudadi Sudadi
Keyword(s):  
Plant Biomass ◽  
Block Design ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Growth And Yield ◽  
Fertilizer Treatment ◽  
Potassium Fertilizer ◽  
Significant Difference ◽  
Two Factors ◽  
Length Data

<p>This research aims to determine the arrowroot responses on piling and potassium fertilizer application on its growth and yield. This research was conducted in Experiment Field of Agriculture Faculty SebelasMaret University at Sukosari, Jumantono, Karanganyar using Randomized Completed Block Design (RCBD) factorial with two factors of piling and potassium fertilization.There are 2 levels of piling, consists of without piling treatment (P0) and with in piling (P1).There are 3 levels of potassium fertilization consist of  250 kg ha-1 KCl, 300 kg ha-1 KCl, and 350 kg ha-1 KCl. Observation variable consist of plant height, leaf number, tiller number, biomass fresh weight per plant, biomass dry weight per plant, tuber numbers per plant, tuber weights per plant, tuber weights per plot, tuber diameter, and tuber length. Data were analyzed using analysis of variance and if there is significant difference, continue with DMRT (Duncan’s Multiple Range Test) of 5% level. The result showed that treatment with in piling (P1) can tends to increase yield of arrowroot plant on tuber numbers per plant, tuber weights per plant, and tuber weights per plot. Potassium fertilizer treatment with  350 kg ha-1 dose KCl tends to increase at growth and yield in all variables except the tiller numbers.</p>

scholarly journals Phosphorus Budget for a Forested-Agricultural Watershed in Korea

Water ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 4 ◽  
Author(s):  
Arif Reza ◽  
Jaesung Eum ◽  
Sungmin Jung ◽  
Youngsoon Choi ◽  
Changwon Jang ◽  
...  
Keyword(s):  
Management Strategies ◽  
Sewage Treatment ◽  
Agricultural Practices ◽  
Fertilizer Application ◽  
Drainage Water ◽  
Agricultural Watershed ◽  
Application Rates ◽  
P Balance ◽  
Agriculture Fertilizer ◽  
Total P

Despite increased attention to the need for sustainable agriculture, fertilizer application rates above crop requirements remain common agricultural practices in South Korea, causing eutrophication of freshwater and coastal ecosystems. The aim of this study is to quantify phosphorus (P) inputs, outputs, and retention in a forested-agricultural watershed. The P budget showed that the combined use of chemical fertilizer and organic compost was the largest source of P (97.6% of the total) followed by atmospheric wet deposition (2.1% of the total P), whereas forest export (0.2% of the total) and sewage treatment plants (STPs) (0.1% of the total) were negligible. The P outputs were crop harvesting and hydrologic export to surface water. The P balance showed that P inputs are higher than the P outputs; approximately 87% of the total P input was retained in the soils within the watershed. However, P concentrations in drainage water were still high enough to cause eutrophication of downstream reservoirs. The results provide important details on the proportion of P export and retention in the watershed. This will help efforts to improve water quality and design better management strategies for agricultural nonpoint source pollution.

scholarly journals Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

HortScience ◽  
2022 ◽  
Vol 57 (1) ◽  
pp. 72-80
Author(s):  
Manman Wang ◽  
Youliang Ye ◽  
Xv Chu ◽  
Yanan Zhao ◽  
Shuhong Zhang ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Vegetation Index ◽  
Soluble Sugar ◽  
Economic Value ◽  
Economic Losses ◽  
Potassium Fertilizer ◽  
Safety Issues ◽  
Application Rates ◽  
K Fertilizer ◽  
Phosphorus And Potassium

Potassium (K) is a critical plant nutrient that determines quality in a myriad of crops and increases production yields. However, excessive application of various types of K fertilizers can decrease both the food quality and yields, which translates as economic losses and food safety issues. The objectives of this study were to 1) elucidate the impacts of different application rates of various K fertilizers on garlic, with the aim to identify the optimal and most economical K fertilizer dosage and 2) compare the effects of applying two common K fertilizers (KCl and K2SO4) on garlic, to determine the optimal combination. From 2018 to 2020, we utilized two distinct K-fertilized fields to conduct our experiments. The results revealed optimal KCl fertilization increased the biomass and vegetation index in garlic, and promoted the transfer of nitrogen, phosphorus, and potassium nutrients from the stem and leaf to bulb, thereby increasing bulb production. The application of KCl fertilizer increased the number of cloves, the diameters of the cloves and bulbs, and reduced variations in bulb size. In addition, the application of KCl fertilizer improved the nutritional quality (Vitamin C, soluble sugar, soluble protein, and allicin) of the garlic and reduced the accumulation of nitrate. However, excessive KCl fertilizer cause decreased yields, appearance traits, and nutritional quality. Applying the same rate of K fertilizer in the form of K2SO4 in isolation increased the garlic yield by only 0.1% to 22.5% when compared with KCl fertilizer. However, the results were not always significant. In this study, the highest yields, appearance traits, and nutritional quality were achieved with the ratio of K2SO4: KCl = 3:1. Consequently, to ensure the highest economic value (considering the market prices of K fertilizer, garlic sprouts, and bulbs), the authors recommend a K fertilizer rate of 252.5 kg·ha−1 K2O, with K2SO4 accounting for 61.6% for garlic production in field.

scholarly journals Parametric and Optimization Studies on the entrapment of Potassium Fertilizer into Chitosan-Poly(methacrylic acid) Carrier via Ionic Gelation

2019 ◽  
Vol 268 ◽  
pp. 06009 ◽  
Author(s):  
Diana Jane M. Plofino ◽  
Clint Charles P. Brutas ◽  
Catalino G. Alfafara ◽  
Monet Concepcion Maguyon-Detras ◽  
Veronica P. Migo
Keyword(s):  
Slow Release ◽  
Fertilizer Application ◽  
Release Mechanism ◽  
Ionic Gelation ◽  
Polymerization Time ◽  
Potassium Fertilizer ◽  
K Fertilizer ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Bodies Of Water

Nanofertilizer is an emerging technology for exhibiting slow release mechanism of fertilizer application. This slow release mechanism allows increase in nutrient uptake of plants while minimizing environmental pollution; specifically, reducing eutrophication in bodies of water. This study includes parametric and optimization studies for ionic gelation process in the formulation of potassium fertilizer in chitosan polymethacrylic acid (CS-PMAA) carrier, and subsequent characterization of the formulated K fertilizer. A 2k factorial experimnental design was initially implemented to determine significant factors. Results show that polymerization time inversely affects the K content concentration of the K-CS-PMAA fertilizer due to the swelling behavior of chitosan, while K:CS-PMAA ratio directly affects the K content concentration. Upon numerical optimization, the conditions found to maximize K content of the formulated fertilizer are 3000 ppm K+ corresponding to 1.5:1 ratio of the K loading concentration to CS-PMAA carrier for 30 mins polymerization time. The optimum K content of K-CS-PMAA fertilizer is about 34.98% w/w – less than the 44.27% w/w K content of the fertilizer grade, muriate of potash (MOP). The Dynamic Light Scattering (DLS) and Scanning Electron Microscope (SEM) results of 368.1 nm and 75.4 nm, respectively, indicated that K-CS-PMAA is nanosized. The Fourier Transform Infrared Spectroscopy (FT-IR) results proved the presence of CS-PMAA with deviations at 1483.01 and 1405.07 caused by the vibration in the --COO-anion groups of PMAA indicating the attachment of potassium in the nanoparticle. Furthermore, the fertilizer formulated was proved to exhibit slow release behavior with the value of 83.70% K+ release after 48 hours compared to the 99.43% release of MOP.

scholarly journals Combined Application of Inoculant, Phosphorus and Potassium Enhances Cowpea Yield in Savanna Soils

Agronomy ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Obianuju Chiamaka Emmanuel ◽  
Olayiwola Akin Akintola ◽  
Francis Marthy Tetteh ◽  
Olubukola Oluranti Babalola
Keyword(s):  
Soil Phosphorus ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Potassium Fertilizer ◽  
Combined Application ◽  
K Fertilizer ◽  
Phosphorus And Potassium ◽  
Sudan Savanna ◽  
Savanna Soils

Low soil phosphorus levels in savanna soils of Ghana limit cowpea response to inoculation. A two-year experiment was carried out on 2 soil types of the Guinea and Sudan savanna zones of Ghana based on the hypothesis that Bradyrhizobia inoculant (BR3267) in combination with phosphorus and potassium fertilizer will significantly increase cowpea root nodulation, growth and yield. The study aimed to determine the effect of phosphorus and potassium fertilizer on cowpea response to Bradyrhizobia inoculant. The treatments were laid out in Randomized Complete Block Design, replicated four times. The plot size was 8 × 3 m, with the sowing distance of 60 × 20 cm. The treatment comprises of commercial Bradyrhizobia inoculant, phosphorus (0, 30, 40 kg P2O5 ha−1) and potassium (0, 10, 20, 30 K2O ha−1). Application of Bradyrhizobia inoculant with 30 kg P2O5 ha−1 and 20 kg K2O ha−1 gave the highest grain yield (1.68 and 1.86 tons ha−1) at both soils which did not differ from the yield obtained from BR-40-30 kg ha−1 P2O5 and K2O ha−1 on the Ferric Lixisol and BR-40-20 kg ha−1 P2O5 and K2O on the Ferric Luvisol. The same treatment also gave the highest nodule number and nodule dry weight. The results of this study have shown that the application of Bradyrhizobia inoculant followed by P and K fertilizer was effective for cowpea growth in field conditions.

scholarly journals Total soil electrical conductivity and critical soil K+ to Ca2+ and Mg2+ ratio for potato crops

1999 ◽  
Vol 56 (4) ◽  
pp. 993-997 ◽  
Author(s):  
Roberto Anjos Reis Jr. ◽  
Paulo Cezar Rezende Fontes ◽  
Júlio Cesar Lima Neves ◽  
Nerilson Terra Santos
Keyword(s):  
Electrical Conductivity ◽  
Tuber Yield ◽  
Block Design ◽  
Fertilizer Application ◽  
Linear Increase ◽  
Potassium Fertilizer ◽  
Total Electrical Conductivity ◽  
Randomized Block Design ◽  
K Fertilizer ◽  
Set Up

Soil K+ to Ca2+ and Mg2+ ratio as well as the total salinity were evaluated in response to potassium fertilizer application onto potato. Potassium was applied at six different rates (0, 60, 120, 240, 480 and 960 kg ha-1 of K2O), as K2SO4, and was placed during planting time in the furrow. Soil from the 0-200 mm layer was collected in the furrow, 20 and 48 days after plant emergence (DAE) to evaluate soil pH, K+, Ca2+ and Mg2+ contents and the total electrical conductivity (EC). A factorial design (6x2), with six K rates and two sampling times was set up in a randomized block design with four replications. The application of K fertilizer increased exchangeable K, did not affect pH and exchangeable Ca and Mg contents, but caused a linear increase of the soil K+/(Ca2++Mg2+)1/2 ratio as well as EC. At 20 DAE, the critical soil K+/(Ca2++Mg2+)1/2ratio and the EC associated with maximum tuber yield (30.5 Mg.ha-1, with 353.4 kg ha-1 of K2O) were 1.79 and 1.6 dS m-1, respectively. The highest soil K+/(Ca2++Mg2+)1/2 ratio and EC were obtained with the highest application of K fertilizer, which led to a reduction in the potato tuber yield.

scholarly journals Effect of potassium fertilization on its available and fixed content in vineyard soil

2002 ◽  
Vol 47 (1) ◽  
pp. 37-44 ◽  
Author(s):  
V. Licina ◽  
N. Markovic
Keyword(s):  
Ammonium Acetate ◽  
Extraction Methods ◽  
Fertilizer Application ◽  
First Year ◽  
Potassium Fertilizer ◽  
Brown Forest Soil ◽  
Soil Layers ◽  
Soil Potassium ◽  
K Fertilizer

The experiment was conducted on brown forest soil in the vineyard with Sauvignon blanc variety on Kober 5BB rootstock. During a thre- year experiment (1994-1996), potassium fertilizer was added in a dose of 0 kg K2O/ha, 50 kg K2O/ha, 100 kg K2O/ha, 150 K2O/ha respectively. After the determination of soil potassium content (1870-1920 mg K2O/100 g), its available form was monitored by using two different extraction methods (AL method and 1N ammonium-acetate extraction). The amount of extracted available K was not significant between the used methods, while the effect of fertilization was visible only at 150 kg/ha potassium rate during the first year in soil layers (30-60 cm, 60-90 cm). Also, another examined soil K fraction (fixed K+) was not affected by K fertilizer application.

scholarly journals Potassium fertilization for pineapple: effects on soil chemical properties and plant nutrition

2011 ◽  
Vol 33 (2) ◽  
pp. 627-636 ◽  
Author(s):  
Luiz Antonio Junqueira Teixeira ◽  
José Antonio Quaggio ◽  
Heitor Cantarella ◽  
Estêvão Vicari Mellis
Keyword(s):  
Nutritional Status ◽  
Chemical Properties ◽  
Soil Samples ◽  
Soil Chemical Properties ◽  
Tissue Analysis ◽  
Potassium Fertilizer ◽  
Application Rates ◽  
K Fertilizer ◽  
The City ◽  
Pineapple Leaves

A field experiment was carried out on an Ultisol located at the city of Agudos (22º30'S; 49º03'W), in the state of São Paulo, Brazil, in order to determine the effects of rates and sources of potassium fertilizer on nutritional status of 'Smooth Cayenne' pineapple and on some soil chemical properties. The experiment was a complete factorial design with four rates (0, 175, 350, and 700 kg ha-1 of K2O) and three combinations of K sources (100% KCl, 100% K2SO4 and 40% K2SO4 + 60% KCl). Soil samples were taken from the depths 0-20 cm, 20-40 cm and 40-60 cm at planting and 14 months after. Nutritional status of pineapple plants was assessed by means of tissue analysis. Soil K availability increased with application of K fertilizer, regardless of K sources. Soil chlorine and Cl concentration in pineapple leaves increased with application of KCl or K2SO4+KCl. Plant uptake of potassium was shaped by soil K availability and by the application rates of K fertilizer, independently of K sources.

Characteristics of K Nutrient Input/Output and its Balance for Wheat Season in China

2014 ◽  
Vol 678 ◽  
pp. 720-725 ◽  
Author(s):  
Li Min Chuan ◽  
Huai Guo Zheng ◽  
Cui Ping Tan ◽  
Su Fen Sun ◽  
Jun Feng Zhang
Keyword(s):  
Yangtze River ◽  
Northwest China ◽  
Fertilizer Application ◽  
Central China ◽  
The Yangtze River ◽  
North Central ◽  
Previous Crop ◽  
Application Rates ◽  
K Fertilizer

In this study, the input and output parameters of potassium (K) for wheat season were collected from 2000 to 2011 to evaluate the nutrient cycling and balance in North Central China, the Middle and Lower Reaches of the Yangtze River and Northwest China. The results showed that the K fertilizer application rates for each region were 74.7, 102.9 and 50.6 kg K/ha, the K brought from previous crop were 99.5, 19.8 and 23.4 kg K/ha, and brought from seeding were 1.0, 0.8 and 0.7 kg K/ha, respectively. The K input from atmospheric deposition and irrigation were all considered zero. The K uptake by harvest in above-ground plant in North Central China, the Middle and Lower Reaches of the Yangtze River and Northwest China were 131.8, 159.9 and 119.8 kg K/ha. As a result, The K balance in North Central China showed surplus by 43.6 kg/ha, while in the Middle and Lower Reaches of the Yangtze River and Northwest China, the K balance were both deficiency by 36.4 and 45.1 kg/ha, even though it did not affect the crop yield. While it is suggested that we need to adjust the K fertilizer application in a long term, in order to maintain the sustainable soil fertility.

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