Managing Planting Materials and Planting Stock Production of Tropical Tree Species

Maid, Mandy; Kitingan, Crispin; Kodoh, Julius

doi:10.1201/9780429442773-2

“…Being a conifer, C. lusitanica produces its seeds within cones [2]. It has been observed that there exists a variation in seed collection practices which compromises germination and subsequent quality [13][14][15]. The challenges that have been observed in seed collection of C. lusitanica infer relationship between cone and seed characteristics.…”

mentioning

confidence: 99%

Influence of Cupressus lusitanica Mill. Cones and Seed Characterization on Germination in Kenya

Angaine

¹

,

Onyango

²

,

Ndungu

³

et al. 2021

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Cupressus lusitanica is a key plantation species with many uses leading to demand for seed. This species produces seeds within cones, which are collected for seed extraction. There are variations in seed collection and handling which compromise quality. Few studies focus on cone morphometry and seed characterization, thereby causing a gap in quality improvement through packaging and subsequent germination. Fifty cones were collected from each of the thirty identified trees within a clonal seed orchard. Cone characterization, seed extraction and germination were performed in the laboratory. This was a factorial experiment with three factors: cone diameter, seed diameter and seed density and their influences on germination. The present study separated the cones by diameter (20mm sieve) and weight. Seed were sieved (2mm sieve) weighed, floated and germinated. The results showed that seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low cost technique for seed quality improvement. The technique in the present study improved germination from 25% to 50%, and also reduced the number of seeds per kilogram from 290,000 to 105,000.Contribution/Originality: The paper's primary contribution is finding that C. lusitanica seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low-cost technique for seed quality improvement. INTRODUCTIONCupressus lusitanica [1,2] also called Mexican cypress, was globally introduced in many tropical plantation areas to increase diversity of plantation species suitable for timber due to the susceptibility of other species to biological attacks [3,4]. In Kenya, C. lusitanica is the most widely planted commercial species comprising about

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“…Being a conifer, C. lusitanica produces its seeds within cones [2]. It has been observed that there exists a variation in seed collection practices which compromises germination and subsequent quality [13][14][15]. The challenges that have been observed in seed collection of C. lusitanica infer relationship between cone and seed characteristics.…”

mentioning

confidence: 99%

Untitled

2021

Journal of Forests

0

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Cupressus lusitanica is a key plantation species with many uses leading to demand for seed. This species produces seeds within cones, which are collected for seed extraction. There are variations in seed collection and handling which compromise quality. Few studies focus on cone morphometry and seed characterization, thereby causing a gap in quality improvement through packaging and subsequent germination. Fifty cones were collected from each of the thirty identified trees within a clonal seed orchard. Cone characterization, seed extraction and germination were performed in the laboratory. This was a factorial experiment with three factors: cone diameter, seed diameter and seed density and their influences on germination. The present study separated the cones by diameter (20mm sieve) and weight. Seed were sieved (2mm sieve) weighed, floated and germinated. The results showed that seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low cost technique for seed quality improvement. The technique in the present study improved germination from 25% to 50%, and also reduced the number of seeds per kilogram from 290,000 to 105,000.Contribution/Originality: The paper's primary contribution is finding that C. lusitanica seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low-cost technique for seed quality improvement. INTRODUCTIONCupressus lusitanica [1,2] also called Mexican cypress, was globally introduced in many tropical plantation areas to increase diversity of plantation species suitable for timber due to the susceptibility of other species to biological attacks [3,4]. In Kenya, C. lusitanica is the most widely planted commercial species comprising about

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Various presowing treatments for enhancing Melia dubia (Cav.) seed germination, seedling development, and vigor index

Singh,

Kumar

et al. 2024

Trees, Forests and People

0

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Managing Planting Materials and Planting Stock Production of Tropical Tree Species

Cited by 3 publications

References 1 publication

Influence of Cupressus lusitanica Mill. Cones and Seed Characterization on Germination in Kenya

Influence of Cupressus lusitanica Mill. Cones and Seed Characterization on Germination in Kenya

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Various presowing treatments for enhancing Melia dubia (Cav.) seed germination, seedling development, and vigor index

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