Effect of Supplemental Lighting, Substrate (Potting Mix) Volume and Plant Densities on Potato Minituber Production During Winter Greenhouse Culture in Quebec

Abdulnour, Jihad; Roy, G.; Desjardins, Yves

doi:10.17660/actahortic.2003.619.6

Cited by 3 publications

(6 citation statements)

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“…Lowering planting density significantly increased the number of tubers per plant in all grades (Table 4) in concordance with effects commonly found in in vitro derived plantlets (Lommen and Struik 1992c;Roy et al 1995;Abdulnour et al 2003). In crops from seed tubers, the number of tubers produced per plant is determined by the number of tubers per stolon, the number of stolons per stem and the number of stems per plant (Haverkort et al 1990).…”

Section: Yield Componentssupporting

confidence: 80%

“…As expected, lowering the planting density led to a lower number of tubers per m 2 (Roy et al 1995;Abdulnour et al 2003), but because a higher fresh weight per tuber partly counteracted this effect, there was only weak decrease in the final tuber fresh yield per m 2 with decreasing planting density ( Table 3). The lower number of tubers per m 2 at lower planting density resulted from the much lower number of plants planted per m 2 .…”

Section: Yield Componentssupporting

confidence: 60%

“…Higher planting densities are well known to increase the numbers of minitubers per m 2 , but-comparable to seed tuber crops-to reduce the minituber number per plant and their size (Lommen and Struik 1992c;Roy et al 1995;Abdulnour et al 2003). Less is known about the mechanisms through which minituber numbers and their sizes are affected by planting density.…”

Section: Introductionmentioning

confidence: 99%

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How Planting Density Affects Number and Yield of Potato Minitubers in a Commercial Glasshouse Production System

Veeken

Lommen

2009

Potato Res.

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Commercial potato minituber production systems aim at high tuber numbers per plant. This study investigated by which mechanisms planting density (25.0, 62.5 and 145.8 plants/m 2 ) of in vitro derived plantlets affected minituber yield and minituber number per plantlet. Lowering planting density resulted in a slower increase in soil cover by the leaves and reduced the accumulated intercepted radiation (AIR). It initially also reduced light use efficiency (LUE) and harvest index, and thus tuber weights per m 2 . At the commercial harvest 10 weeks after planting (WAP), LUE tended to be higher at lower densities. This compensated for the lower AIR and led to only slightly lower tuber yields. Lowering planting density increased tuber numbers per (planted) plantlet in all grades. It improved plantlet survival and increased stem numbers per plant. However, fewer stolons were produced per stem, whereas stolon numbers per plant were not affected. At lower densities, more tubers were initiated per stolon and the balance between initiation and later resorption of tubers was more favourable. Early interplant competition was thought to reduce the number of tubers initiated at higher densities, whereas lateroccurring interplant competition resulted in a large fraction of the initiated tubers being resorbed at intermediate planting densities. At low planting densities, the high number of tubers initiated was also retained. Shortening of the production period could be considered at higher planting densities, because tuber number in the commercial grade > 9 mm did not increase any more after 6 WAP.

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Section: Yield Componentssupporting

confidence: 80%

Section: Yield Componentssupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

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How Planting Density Affects Number and Yield of Potato Minitubers in a Commercial Glasshouse Production System

Veeken

Lommen

2009

Potato Res.

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“…Turklāt, R. Rojs un kolēģi (Roy et al, 1995) augiem siltumnīcā nodrošināja papildus apgaismojumu, tā palielinot augiem pieejamās fotosintētiski aktīvās radiācijas daudzumu, kas varēja sekmēt lielāka sīkbumbuļu skaita izveidošanos. Dziļāka substrāta un papildus apgaismojuma pozitīvā ietekme uz sīkbumbuļu skaita palielināšanos ir apstiprināta Kanādā veiktā pētījumā (Abdulnour, Roy, Desjardins, 2003).…”

Section: Sīkbumbuļu Pavairošanas Koeficients Siltumnīcāunclassified

“…Promocijas darba pētījumā iegūtās relatīvo izmaiņu tendences šķirnei 'Mandaga', kad, paaugstinot MSB, SbS procentuālais pieaugums bija relatīvi lielāks par PkoefS procentuālo samazināšanos, apstiprina datus, kuri iegūti gan izmantojot konvencionālo sīkbumbuļu audzēšanas paņēmienu (Roy et al, 1995;Çalışkan et al, 2021), gan audzējot sīkbumbuļus aeroponikā (Calori et al, 2018). Tomēr ir publicēti pētījumi, kuros iegūtie rezultāti rāda pretēju tendenci, kad SbS pieaugums procentos, paaugstinot MSB, bija mazāks, salīdzinot ar PkoefS relatīvās samazināšanās lielumu (Abdulnour, Roy, Desjardins, 2003) un līdzīga tendence bija šķirnēm 'Monta' un 'Prelma' promocijas darba pētījumā. Salīdzinot ar bāzes MSB63, šķirnei 'Prelma' SbS relatīvais pieaugums pārsniedza PkoefS relatīvo samazināšanos pie MSB142 (attiecīgi 42.5% un -36.9%), bet 'Montai' tikai pie MSB95 bija relatīvi lielāks SbS pieaugums, salīdzinot ar PkoefS samazināšanos (27.8% un -15.4%) (15.…”

Section: Sīkbumbuļu Ražu Raksturojošu Rādītāju Izmaiņu Tendences Mikr...unclassified

Evalution of possibilities to increase efficiency of potato minituber production = Kartupeļu sīkbumbuļu audzēšanas efektivitātes paaugstināšanas iespēju izvērtējums

Dimante¹

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Dimante I. (2021). Evaluation of possibilities to increase efficiency of potato minituber production. Research paper to obtain for the Ph.D. in Agriculture, Forestry and Fisheries. Latvia University of Life Sciences and Technologies. Jelgava, 149 p. Laboratory, greenhouse and field experiments were carried out at the Institute of Agricultural Resources and Economics, Priekuli Research Center from 2013 to 2017. Hypothesis of the thesis The agronomic efficiency of potato minituber production can be increased without significant financial and technological investment, but the most agronomically efficient growing technology is not always the most cost-effective. The aim of the thesis To evaluate the possibilities of improving the efficiency of potato minituber production by changing the planting density of microplants in the greenhouse to ensure a high yield of high-quality seed potato of the first category under field conditions. Research tasks 1. To assess the effect of increasing the microplant planting density on the number of minitubers of different varieties in the greenhouse. 2. To assess the effect of minituber size on the development of plants and seed yield of different potato varieties under field conditions. 3. To determine the field value of the greenhouse unit area and of one microplant depending on the microplant planting density. 4. To evaluate the economic efficiency of changes in microplant densities (minituber growing technology) in a greenhouse. 5. To examine the effects of the propagation method of microplants on the morphology of microplants and the subsequent effects on the number and yield of minitubers in a greenhouse. The structure of the research paper Chapter 1 - The literature review includes 6 subchapters. A brief overview of potato growth, development and yield formation is provided in the chapter. Insights into the history of the formation of seed potato production systems are given, and potato micropropagation methods and minituber cultivation technologies are examined. Plant growth and development specifically from minitubers under field conditions are described. The approaches used to evaluate the efficiency of tuber cultivation are briefly described. Chapter 2 - Materials and Methods includes 6 subchapters. The chapter describes the methodology of the experiments, the studied material, the observations and analyses performed, the meteorological conditions and the data analysis. Chapter 3 - The results and discussion include 5 subsections. This chapter analyses the agronomic efficiency of minituber production depending on the microplant planting density in the greenhouse. The field performance of minitubers depending on their size and data on the field value of the greenhouse unit area and of one microplant were assessed. The evaluation of the economic efficiency of changes in minituber growing technology has been performed. The effects of the propagation method of microplants on the morphology of potato microplants and the subsequent effects on the number and yield of minitubers in the greenhouse were examined. The conclusions include answers to the research tasks. The paper contains 22 tables, 38 figures, 33 annexes and 342 references.

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High Microplant Densities in Greenhouses – Are they Always Efficient in Small Potato Minituber Production Systems?

Dimante

Gaile

Cerina³

et al. 2022

Am. J. Potato Res.

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Effect of Supplemental Lighting, Substrate (Potting Mix) Volume and Plant Densities on Potato Minituber Production During Winter Greenhouse Culture in Quebec

Cited by 3 publications

References 0 publications

How Planting Density Affects Number and Yield of Potato Minitubers in a Commercial Glasshouse Production System

How Planting Density Affects Number and Yield of Potato Minitubers in a Commercial Glasshouse Production System

Evalution of possibilities to increase efficiency of potato minituber production = Kartupeļu sīkbumbuļu audzēšanas efektivitātes paaugstināšanas iespēju izvērtējums

High Microplant Densities in Greenhouses – Are they Always Efficient in Small Potato Minituber Production Systems?

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