Determination of low boron concentrations in nutrient solution

1996 ◽  
Vol 180 (1) ◽  
pp. 97-99 ◽  
Author(s):  
V. J. Chapman ◽  
G. L. Kerven ◽  
D. G. Edwards ◽  
C. J. Asher ◽  
F. P. C. Blamey
Keyword(s):  
Nutrient Solution

Determination of carbofuran in a nutrient solution by GLC/NPD and HPLC

1990 ◽  
Vol 30 (7-8) ◽  
pp. 421-423 ◽  
Author(s):  
C. F. Ling ◽  
G. Pérez-Melián ◽  
F. Jiménez-Conde ◽  
E. Revilla
Keyword(s):  
Nutrient Solution

scholarly journals Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed Straw

2009 ◽  
Vol 71 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Józef Babik ◽  
Waldemar Kowalczyk
Keyword(s):  
Nitrogen Content ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Research Work ◽  
Growing Season ◽  
Cultivation Period ◽  
Greenhouse Cucumber ◽  
Cucumber Yield

Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed StrawIn the years 2004-2008, research work was carried out whose aim was to determine the optimal nitrogen fertilization dose for greenhouse cucumbers grown on mats made of compressed, finely shredded straw. In the experiments, the short-fruited variety of the greenhouse cucumber, Milenium F1, was used. The level of nitrogen in the nutrient solution was varied in the range of 200-350 mg·dm-3. The nitrogen content in the solution in the amount of 200 mg·dm-3was not sufficient and caused the cucumber yield to fall. The increasing N concentrations in the medium were found to have a significant effect on the nitrogen content in the indicator parts of cucumber plants. The highest nitrogen content was found in the plants fertilized with a nutrient solution containing the highest concentration of N-NO3, which was 350 mg·dm-3. Cucumber plants grown on straw need to be more intensely fertilized with nitrogen for about 1/3 of the growing season, and then to have its level in the fertigation medium reduced for the remaining part of the cultivation period.

Automatic Fluorimetric Procedure for the Determination of Aluminium in Plant Nutrient Solution and Natural Water Employing a Multicommutated Flow System

2004 ◽  
Vol 146 (3-4) ◽  
pp. 291-296 ◽  
Author(s):  
Ana Paula S. Paim ◽  
Boaventura F. Reis ◽  
Victor A. Vitorello
Keyword(s):  
Nutrient Solution ◽  
Natural Water ◽  
Flow System ◽  
Plant Nutrient

scholarly journals Bioaccumulation of 60Co2+ ions in tobacco plants

2022 ◽  
Vol 7 (1) ◽  
pp. 41-49
Author(s):  
Ľuboš Vrtoch ◽  
Martin Pipíška ◽  
Miroslav Horník ◽  
Jozef Augustín
Keyword(s):  
Growth Rate ◽  
Nutrient Solution ◽  
Root Surface ◽  
Tobacco Plants ◽  
Initial Concentration ◽  
Nicotiana Tabacum L ◽  
Tobacco Roots ◽  
Radionuclide Uptake ◽  
Exchangeable Form

Tobacco has previously been used in investigations of metals and radionuclide uptake. This study presents determination of bioaccumulation and translocation of 60Co2+ ions in tobacco plants (Nicotiana tabacum L.) grown in Hoagland’s nutrient solution. Cobalt concentration in tobacco plants increased with increasing concentration in nutrient solution. Bioaccumulation from the initial concentration C0 = 0.96 μM Co reached 90% after 7 day cultivation. Only small amounts of Co accumulated in roots, up to 2 - 4 % were removable from roots by washing with 0.1 M CoCl2, indicating that this portion of Co is bound to the root surface in ion-exchangeable form. Tobacco roots retained approximately 2/3 of accumulated cobalt and 1/3 was transported to shoots. Autoradiography revealed that 60Co was preferentially localized in younger leaves. Prolongation of cultivation time did not change the [Co]roots : [Co]shoots ratio significantly. Relationships between growth rate, transpiration rate, uptake and distribution of cobalt in plant tissue are discussed.

scholarly journals Substrates and fertilizations in the initial growth of the desert rose

2018 ◽  
Vol 24 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Guilherme Augusto Cito Alves ◽  
Rodrigo Thibes Hoshino ◽  
Douglas Junior Bertoncelli ◽  
Ana Beatryz Prenzier Suzuki ◽  
Ronan Carlos Colombo ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Error Probability ◽  
Dry Mass ◽  
Initial Growth ◽  
Coconut Fiber ◽  
Tukey Test ◽  
Leaf Dry Mass ◽  
Sand Pine ◽  
Number Of Shoots

The desert rose (Adenium obesum) has been highlighted in the internal market, however there are not many studies related to its demands regarding its nutrition and substrates. The aim of this study was to evaluate the effect of different fertilizations and its interactions with different substrates in the initial growth of the desert rose. The seedlings of desert rose with 60 days have been potted transplanted with a capacity of 0.415 L, filled with two kinds of substrates: sand + coconut fiber and sand + composted pine powder. Four different fertilization managements have been done: without fertilization, application of the Hoagland & Arnon nutrient solution; application of NH3 NO4 at 590 g L-1 of nitrogen (N); and the application of the Hoagland & Arnon nutrient solution modified through the addition of NH3 NO4 , increasing the concentration of N to 800 g L-1. The solutions have been applied biweekly adding 50 mL per pot. The experiment has been entirely randomized in a 2x4 factorial design, with 10 repetitions. After 150 days from the beginning of the fertilizations the phytometrical parameters evaluated were: height of the shoot; diameter of the basal caudex; number of shoots; dry mass of the roots, caudex and leaves; and determination of the levels and accumulation of macronutrients in the shoot, and the pH and electrical conductivity of the substrates. The evaluated data have been submitted to an analysis of variance and the Tukey test compared through the test at 5% of error probability. For all the evaluated parameters, when the composted pine mixture was used, the seedlings showed a higher development compared to coconut fiber mixture. The seedlings had a better performance with the modified Hoagland solution for height, number of shoots, caudex diameter and leaf dry mass in both substrates. The use of the sand + pine powder (1:1 v v-1) and the fertilization with Hoagland & Arnon solution combined with the NH3 NO4 solution provided a better initial growth on the desert rose.

scholarly journals Determination of Nutrient Solutions for Potato (Solanum tuberosum L.) Seed Production under Aeroponics Production System

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Lemma Tessema ◽  
Abebe Chindi ◽  
W. Giorgis Gebremedhin ◽  
Atsede Solomon ◽  
Egata Shunka ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Agricultural Research ◽  
Solanum Tuberosum L ◽  
Potato Cultivar ◽  
Critical Factor ◽  
High Yield ◽  
Potato Seed ◽  
Nutritional Requirement ◽  
Nutrient Solutions

AbstractIn soilless culture like aeroponics, nutrient optimization is the most critical factor to produce high quality and high yield of clean potato seed. Each crop has an optimum nutritional requirement. Even each potato cultivar may require a specific nutrient solution in an aeroponics unit. A nutrient optimization experiment was conducted at Holetta agricultural research center to study the effect of different nutrient solution levels on the physical quality and yield of potato mini-tubers. The treatments were four different nutrient solutions of greenhouse grade macro nutrients measured in (g) for the preparation of 500 liter volume of nutrient solution that is to be restocked when the nutrient tank becomes empty. The nutrient EC and pH were adjusted as per the requirements. A=(118 g CaNO

scholarly journals Justification and calculation of design features of drum-type hydroponics

2021 ◽  
Vol 282 ◽  
pp. 07014
Author(s):  
A.A. Sadov ◽  
A.D. Ustyugov ◽  
I.L. Chukin ◽  
K.M. Potetnya ◽  
M.V. Kholmanskikh
Keyword(s):  
Plant Height ◽  
Light Source ◽  
Nutrient Solution ◽  
Cylindrical Surface ◽  
Energy Savings ◽  
Promising Method ◽  
Minimum Amount ◽  
Design Features ◽  
Rational Use

The purpose of the article is to evaluate the design features of rotary hydroponics and then obtain a method for calculating the main technical characteristics. Drum (rotary) hydroponics is a promising method of growing on artificial media. The planting surface in this method is located on the inner cylindrical surface of the rotor rotating around the lamp. The design of the rotary hydroponics has a number of advantages such as: smaller installation area due to planting in the cylinder area; energy savings due to rational use of the light source; liquid saving for the formation of a nutrient solution due to the alternate immersion of the roots in a more compact bath. In this paper, a number of theoretical aspects for the calculation of drum (rotary) hydroponic machines is considered to ensure the highest productivity. As a result, a method for calculating the following characteristics was derived: determination of the required radius of the rotor depending on plant height; number of planting spots with a known radius and width of the rotor; minimum amount of necessary nutrient solution; electricity consumed when using LED lamps.

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