Source Variation in Chemical Characteristics of Coconut Coir Dust

Chemical characteristics of saturated media extracts of coconut (Cocos nuc L.) coir dust were determined from material from different sources (producers and countries) and were found to be source-dependent. For all samples tested, the pH was between 5.5 and 6.6, and the electrical conductivity ranged from 0.2 to 2.4 cm–1. Nitrate-N levels were between 0.3 and 8 ppm, and ammoniacal-N levels were 0.2 ppm or less. Calcium and Mg levels ranged from 1 to 24 and 1 to 3 ppm, respectively. Potassium and Cl levels ranged widely from 16 to 686 and 24 to 600 ppm, respectively. Sodium levels were between 28 and 53 ppm. The levels of B, Cu, Fe, Mn, and Zn were <1 ppm. Although there were significant differences between producers within a country, sources originating from different countries were found to have the greatest differences in chemical characteristics.

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Growth of Dieffenbachia maculata `Camille' in Growing Media Based on Spaghnum Peat or Coconut Coir Dust

HortScience ◽

10.21273/hortsci.31.4.583e ◽

1996 ◽

Vol 31 (4) ◽

pp. 583e-583

Author(s):

Robert H. Stamps ◽

Michael R. Evans

Keyword(s):

Pore Space ◽

Plant Root ◽

Production Cycle ◽

Greenhouse Production ◽

Growing Media ◽

Coir Dust ◽

Saturated Media ◽

Coconut Coir ◽

C 50 ◽

Water Holding

A comparison was made of Philippine coconut coir dust and Canadian spaghnum peat as components of three growing media for greenhouse production of Dieffenbachia maculata `Camille'. The soilless media were prepared using coir or peat in various amounts (by volume) combined with pine bark, vermiculite, and/or perlite (Media A–50% coir/peat: 25% vermiculite: 25% perlite; Media B–40% coir/peat: 30% vermiculite: 30% bark; Media C–50% coir/peat: 50% bark). Chemical and physical properties of the soils were determined at the beginning and the end of the five-month production cycle. Plant root and top growth and grades were determined at the end of the experiment. Initially, saturated media extracts from coir-containing media had elevated K, Cl, and soluble salts levels compared to peat-containing media; however, by the end of the experiment those levels were lower in coir- than in peat-based media. Water-filled pore space and water-holding capacities were generally higher and air-filled pore space lower in coir- than in peat-based media, probably due to differences in particle size distributions. There were no interaction effects on plant growth between growing media and coir versus peat. Plant root and top growth in Media A > Media B > Media C and plant top growth was greater in coir- than in peat-based media. Differences in growth could be due, in part, to differences in media water-holding capacities.

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Water Physico-Chemical Characteristics of the Lakes Burera and Ruhondo, Rwanda

Rwanda Journal of Engineering Science Technology and Environment ◽

10.4314/rjeste.v3i2.5 ◽

2020 ◽

Vol 3 (2) ◽

Author(s):

Valens Habimana ◽

Antoine Nsabimana

Keyword(s):

Water Quality ◽

Electrical Conductivity ◽

Water Quality Monitoring ◽

Quality Monitoring ◽

Chemical Characteristics ◽

Class Iii ◽

Populated Area ◽

Physico Chemical ◽

Steep Slopes ◽

Extensive Agriculture

Rwanda possesses multiple lakes, whose properties were rarely described. The present study assessed physico-chemical characteristics of water in Burera and Ruhondo lakes located in highly populated area with steep slopes, which are under extensive agriculture, thus water quality monitoring is important. Both lakes were alkaline with high content of Mg, while Ruhondo had higher electrical conductivity than Burera. Phosphorus and nitrogen exceeded Class III EPA standards indicating that both lakes are at risk of eutrophication. Keywords: water quality, lakes Burera and Ruhondo, Rwanda

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Study of Plant Growth Promoting Bacteria from Coconut Coir Dust

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/439/1/012037 ◽

2020 ◽

Vol 439 ◽

pp. 012037

Author(s):

T K Dewi ◽

W Z Mubarok ◽

S Antonius

Keyword(s):

Plant Growth ◽

Plant Growth Promoting Bacteria ◽

Coir Dust ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Coconut Coir

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Cultivation of CNPA G3 sesame irrigated with saline water and fertilized with nitrate-N and ammonium-N

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v21n1p14-20 ◽

2017 ◽

Vol 21 (1) ◽

pp. 14-20 ◽

Cited By ~ 2

Author(s):

Geovani S. de Lima ◽

Adaan S. Dias ◽

Lauriane A. dos A. Soares ◽

Hans R. Gheyi ◽

José P. Camara Neto ◽

...

Keyword(s):

Electrical Conductivity ◽

Water Use Efficiency ◽

Water Use ◽

Water Consumption ◽

Saline Water ◽

Early Maturation ◽

Nitrate N ◽

Ammonium N ◽

Use Efficiency ◽

Delayed Flowering

ABSTRACT The study aimed to evaluate the effects of irrigation with saline water and fertilization with nitrate (NO3--N) and ammonium (NH4+-N) ratios on growth, flowering, water consumption and water use efficiency of the sesame cv. CNPA G3. The treatments were distributed in randomized blocks in a 5 x 5 factorial with three replicates, referring to five levels of electrical conductivity of the irrigation water - ECw (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and nitrate (NO3--N) and ammonium (NH4+-N) (200/0, 150/50, 100/100, 50/150, 0/200 mg kg-1) ratios. Irrigation with saline water above 0.6 dS m-1 inhibited the growth, delayed flowering and promoted early maturation of capsules of sesame, cv. CNPA G3. The proportion of 0/200 mg kg-1 of NO3--N/NH4+-N promoted the greatest increase relative to stem diameter and height of sesame plants. Water consumption decreases with increasing ECw and was significantly lower in plants fertilized with the proportion of 0/200 of NO3--N/NH4+-N. The interaction between ECw levels and ammonium/nitrate proportions significantly affect water use efficiency, and the highest value was obtained with ECw of 0.6 dS m-1 and fertilization with 150:50 mg kg-1 of NO3--N and NH4+-N.

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Feasibility study of coconut coir dust briquette

Journal of the Bangladesh Agricultural University ◽

10.3329/jbau.v12i2.28697 ◽

2016 ◽

Vol 12 (2) ◽

pp. 369-376

Author(s):

KK Saha ◽

MM Hossain ◽

MR Ali ◽

MM Alam

Keyword(s):

Physical Properties ◽

Rice Husk ◽

Research Work ◽

Calorific Value ◽

Economic Feasibility ◽

Production Costs ◽

Mixing Ratio ◽

Water Penetration ◽

Coir Dust ◽

Coconut Coir

This research work was conducted on economic feasibility of briquette made of coconut coir dust mixed with rice husk at different ratio. This study sought to assess the physical properties and calorific value of briquette and to establish the demand and willingness of potential users to substitute rice husk briquette and firewood. It was observed that briquette made from mixed coconut coir dust and rice husk at the ratio of 1:2 and 1:1 had desirable properties as compared to rice husk briquette. The percent of shatter indices, density, percent of resistance to water penetration, degree of densification and calorific value of briquette of mixing ratio 1:2 were found 99.75, 1.52gm/cc, 87.5, 11.35 and 4043 kcal/kg and of mixing ratio 1:1 were found 99.82, 1.48gm/cc, 87.5, 10.84 and 3657 kcal/kg, respectively. In case of rice husk briquette, the above values were 99.21, 1.40gm/cc, 75, 10.66 and 3537 kcal/kg, respectively. The production costs of mixing ratio 1:2 and 1: 1 were 3.27 Tk/kg and 3.10 Tk/kg, respectively which were lower than that of rice husk briquette. In partial budget, the substitution propositions among the selected briquettes indicated that coconut coir dust briquette of mixing ratio 1:1 appeared as the most impressive one.J. Bangladesh Agril. Univ. 12(2): 369-376, December 2014

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