The Effect of Fertilizer Level and Foliar-applied Calcium on Seed Production and Germination of Gerbera hybrida

Andreasen, Christian; Kemezys, Andrius Hansen; Müller, Renate

doi:10.21273/hortsci.49.5.538

Cited by 12 publications

(16 citation statements)

References 17 publications

(18 reference statements)

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“…The parameter t 50 has the same unit as the time scale considered in the experiment. The estimation and model checking procedures are based on treating the data as event times, that is, to record the time it takes for germination (the event of interest) to occur as described by Ritz et al (2013) and Andreasen et al (2014).…”

Section: Discussionmentioning

confidence: 99%

Breaking seed dormancy of Alliaria petiolata with phytohormones

Yasin

Andreasen

2015

Plant Growth Regul

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The leaves of Alliaria petiolata have a potential to be used as green salad due to garlic like fragrance and high value of vitamin C and A. Unfortunately, it exhibited deprived germination because of poor physiological impediment and seed dormancy. In order to improve germination, scarified and non-scarified seeds were primed with 0.25, 0.5, 1, 2, 3, 4, 5 mM of gibberellic acid (GA 3 ), ascorbic acid (AsA) and salicylic acid (SA), respectively. Seeds were also hydroprimed and compared with unsoaked seeds (control). Incubation with phytohormones substantially accelerated germination and seedling emergence compare with hydropriming and control. Two millimolar GA 3 improved germination to 82 %, and reduced the germination time where 50 % of the total germinated seeds during the experiment, have germinated (t 50 ). Priming with 4 mM AsA increased germination to 54 % and reduced t 50 compared to control. SA inhibited germination of A. petiolata seeds. Sowing at cm burial depth reduced emergence 89 % irrespective of priming. Seeds sown on a humid soil surface obtain the best seedling establishment. Priming non-scarified seeds with 2 mM GA 3 resulted in faster germination within 10 days. Our scarification method was not successful and seemed to damage the seeds and reduced the germination.

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Section: Discussionmentioning

confidence: 99%

Breaking seed dormancy of Alliaria petiolata with phytohormones

Yasin

Andreasen

2015

Plant Growth Regul

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“…This difference could be attributed to the pores being filled with the NPK fertilizer (BFs), resulting in the density increase of BFs. The densities of BTs and BFs were higher than that of softwood biochar reported by Brewer et al (2014). This indicates that tableting enables binding and compressing of the biochar particles to increase the densities of BTs and BFs.…”

Section: Unit Density Tablet Durability and Moisture Contentmentioning

confidence: 66%

“…Density is a fundamental physical property which controls the movement and interaction of biochar in the soil. Low density (0.25-0.3 g•cm -3 ) has been reported for soft wood biochar (Brewer et al, 2014). This density makes it challenging for biochar to be handled and transported.…”

Section: Unit Density Tablet Durability and Moisture Contentmentioning

confidence: 99%

Characterization of Tablets Made from Mixture of Charred Agricultural Residues with and Without Embedded Fertilizer

Lee

Ahmed

Samsuri

et al. 2019

Acta Technologica Agriculturae

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Densification of biochar can reduce transportation and handling costs, as well as significantly decrease loss of biochar during soil application. Although the nutrient-rich biochar tablets may be a potential cost-effective slow-release fertilizer in soil, there is a lack of information on characterization of mixtures of rubber tree twigs and rice residues tablets with embedded NPK fertilizer. Objective of this work was to determine the physical and chemical properties of biochar tablets with and without embedded fertilizer. Biochar tablets were produced by blending of charred rice husk, rice straw, rubber tree twigs, and starch and followed by tableting. Their production with embedded fertilizer was similar to production process of tablets without it, except adding the NPK fertilizer to blending phase prior to tableting. Fourier-transform infrared spectra analysis indicates was utilized for determination of presence of ammonium and phosphorus substances in the biochar tablets with embedded fertilizer (BFs). The NPK fertilizer significantly increased tablet density and total contents of nitrogen, phosphorus, potassium, calcium and magnesium. The presence of higher amount of nutrients in BFs suggests that it could release nutrients for plant use.

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“…The estimation and model checking procedures are based on treating the data as event times, that is to record the time it takes for germination (the event of interest) to occur (Ritz and Streibig , Andreasen et al. ).…”

Section: Methodsmentioning

confidence: 99%

Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions

Rodríguez

Jacobsen

Sørensen

et al. 2016

J Agronomy Crop Science

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Cañahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the cañahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24°C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15°C). Temperature had significantly effect on the germination percentages of the plants (P < 0.001). Seeds germinated at the lowest temperature (3°C). The estimated base temperature was close to 0°C. A polynomial function described well the relation between time to 50% germination (t 50 ) and temperature in the interval from 3 to 24°C resulting in a linear relationship between germination rate and temperature. Shallow sowing depth (5-25 mm) resulted in 80% germination at 15°C. There were significant differences of emergence in relationship to burial depth (P < 0.001). Only few seedlings emerged when seeds were sown at 50 mm depth. We did not find significant differences in emergence of seedlings between Lasta and Saihua at 15°C. Nevertheless, at 5°C, seedlings of cañahua belonging to the Lasta growth habit form did have higher germination rate as were shown for the Kullaca cultivar and the Umacutama landrace. This may be attributed to larger seed size of these cultivars.

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The Effect of Fertilizer Level and Foliar-applied Calcium on Seed Production and Germination of Gerbera hybrida

Cited by 12 publications

References 17 publications

Breaking seed dormancy of Alliaria petiolata with phytohormones

Breaking seed dormancy of Alliaria petiolata with phytohormones

Characterization of Tablets Made from Mixture of Charred Agricultural Residues with and Without Embedded Fertilizer

Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions

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