Model of Cucumber Growth and Yield Ii. Prediction of Yields

Liebig, H.-P.

doi:10.17660/actahortic.1985.156.18

Cited by 4 publications

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“…Twenty weeks after planting of cucumber seedlings the highest total yield of fruits was harvested at a night temperature of 20°C (when day temperature was 20°C) and at day temperature of 22°C (when night temperature was 19°C). On the other hand, Liebig and Krug (1991) Liebig's (1985b) research shows that weekly cucumber cropping depends, most of all, on solar radiation and next on plant age and T a . According to Kalbarczyk (2009c), higher than average values of both sunshine duration and T a , which in the growing season amount to 7.9 h and 17.5°C respectively, are conducive to earlier agrotechnical and phenological dates, and thus, high cucumber yields.…”

Section: Discussionmentioning

confidence: 99%

Unfavourable thermal conditions of air at the turn of the 20th and 21st centuries reducing crop productivity of pickling cucumber (Cucumis sativus L.) in Poland

Kalbarczyk¹

1970

Span. j. agric. res.

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Growing influence of anthropopressure and irregular changes in weather conditions necessitated conducting agroclimatic research into the assessment of plant cultivation risk caused by unfavourable meteorological conditions, including thermal conditions of air. The goal of the work was to assess the risk of pickling cucumber field cultivation in Poland caused by an unfavorable course of air temperature (T a ) in the period from sowing to the end of harvesting at the turn of the 20 th and 21 st centuries. To accomplish the goal, the study used data describing growth, development and crop productivity of cucumber in the years 1966-2005. Data was used concerning the described thermal conditions with the average T a in the whole growing season of the analysed plant. The data came from 28 experimental stations and 53 meteorological in Poland. The effect of T a in the growing season (sowing-end of harvesting) on the total and marketable yield of cucumber was evaluated. The study used curvilinear regression analysis with two variables. The highest risk of cucumber's cultivation caused by unfavorable thermal conditions of air was recorded in south-western, south-eastern, and also northern and north-eastern Poland. In these high risk areas reduction in the total yield oscillated between 15% and even over 21% below the multi-annual average. Reduction in the total yield occurred with frequency from 40% to above 80%. In south-western and south-eastern Poland, a reduction in the marketable yield amounted to maximally above 15%. A marketable yield reduction occurred with a frequency of from 50% to above 70%.Additional key words: air temperature; climate changes; growing season; reduction in yield. ResumenLas condiciones térmicas desfavorables del aire reducen la productividad de los cultivos de pepino encurtido (Cucumis sativus L.) en Polonia en el cambio de los siglos XX y XXI La creciente influencia de la acción humana y los irregulares cambios en las condiciones climáticas han hecho necesario llevar a cabo investigaciones agroclimáticas para evaluar el riesgo en el cultivo de plantas. El objetivo de este trabajo fue evaluar el riesgo en Polonia en el cultivo en campo de pepino, en el cambio de los siglos XX y XXI, causado por una evolución desfavorable de la temperatura del aire (T a ) en el período desde la siembra hasta el final de la cosecha. Se utilizaron los datos, obtenidos de 28 estaciones experimentales y 53 meteorológicas en Polonia, que describen el crecimiento, desarrollo y productividad de los cultivos de pepino en los años 1966-2005, relacionándolos con la T a media en todo el período vegetativo de la planta. Se evaluó el efecto de la T a en la temporada de cultivo (siembra-final de cosecha) sobre la producción total y comercial del pepino, utilizando un análisis de regresión curvilínea con dos variables. El mayor riesgo del cultivo de pepino debido a las desfavorables condiciones térmicas del aire se registró en el sur-oeste, sudeste y también norte y noreste de Polonia. En estas zonas de alto riesgo l...

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Section: Discussionmentioning

confidence: 99%

Unfavourable thermal conditions of air at the turn of the 20th and 21st centuries reducing crop productivity of pickling cucumber (Cucumis sativus L.) in Poland

Kalbarczyk¹

1970

Span. j. agric. res.

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“…Also there are few studies describing effect of solar conditions on growth, development and yield of cucumber (Liebig, 1985;Liebig and Krug, 1991;Kharkina et al, 2003;Ibarra-Jiménez et al, 2008;Kalbarczyk, 2009), but there are a lot more studies devoted to optimization of cultivation and cropping physiology of the characterized plant (Peil and López-Gálvez, 2002;Talanov et al, 2005;Piszczek and Glowacka, 2008). Cucumber ontogenesis, from seed germination to final stages of ageing and their death, is controlled by light.…”

Section: Discussionmentioning

confidence: 99%

“…Peil and López-Gálvez (2002) found that with increased planting of cucumber, from 1.8 to 2.3 m -2 , the total biomass of the overground parts of the plant and the number and biomass of fruits on the plant decrease; the rate of growth and development is also reduced, but only until the flowering phase. Liebig (1985) observed that weekly cucumber cropping depends mostly on solar radiation and, next, on the age of a plant and air temperature. Sysoeva and Markovskaya (2006) researched effect of light and temperature on the growth rate of, among other plants, cucumber.…”

Section: Discussionmentioning

confidence: 99%

“…Selection of suitable regions for cultivation of crop plants, including cucumber, should be based not only on the knowledge of soil conditions and agrotechnical recommendations but also on the knowledge of temporal and spatial distribution of unfavorable meteorological elements (Liebig, 1985;Liebig and Krug, 1991;Tsai et al, 1996;Medany et al, 1999). Climatic risk of cultivation of the characterized plant can be minimized taking proper decisions before the start of production.…”

Section: Introductionmentioning

confidence: 99%

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Risk of field cultivation of pickling cucumber caused by unfavorable sunshine duration conditions

Kalbarczyk

2011

Sci. agric. (Piracicaba, Braz.)

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Solar energy, accessible to plants during sunshine from the sunrise to the sunset is of key importance in productivity of agrocenoses. The aim of the work was to determine risk of pickling cucumber cultivation caused by an unfavorable course of sunshine duration in Poland on the basis of a 40-year research period . The research into the subject was undertaken due to frequent occurrence of sunshine deficiency in Poland and its high temporal and spatial variability. Effect of solar conditions described by sunshine duration in the five development stages on the quantity of the total and marketable yield of cucumber with consideration of a linear trend of an independent variable was determined by means of multiple regression analysis. The accuracy of the equations was evaluated on the basis of, among other things, determination coefficient, average relative forecast error and the indexes: mean bias error (MBE), mean absolute bias error (MABE) and root mean square error (RMSE). Cucumber (Cucumis sativus L.) yield was confirmed for the period from the end of emergence to the beginning of flowering and from the beginning of harvesting to the end of harvesting. Cucumber yield was lower by 18% than the multiannual average in the years 1966-2005 every 1.5-2 years -in the case of the occurrence of the shortage in the period from the end of emergence to the beginning of flowering and by 12-15% every 2-3 years in the period from the beginning of harvesting to the end of harvesting. In four years, out of the 40 considered ones, simultaneously in both cucumber development stages, unfavorable solar conditions occurred, causing reduction by at least 5% in the total yield of the plant in Poland, and in three years -the marketable yield. Key words: development, growth, reduction in yield, solar conditions Risco do cultivo de campo de pepino decapado causado por condições desfavoráveis de duração de brilho solar RESUMO: A disponibilidade de energia solar para as plantas desde o nascer ao por do sol é de fundamental importância para todo agronegócio. O objetivo deste trabalho foi determinar o risco da produção de pepino (Cucumis sativus L.) decapado causado pelo curso desfavorável de duração da radiação solar na Polônia, baseado em um período de 40 anos de pesquisa . A pesquisa foi realizada pelo fato da ocorrência frequente de deficiência de insolação na Polônia e sua alta variabilidade temporal e espacial. O efeito das condições solares descritas pela duração da insolação foi estudado em relação às produtividades total e comerciável de pepino, considerando uma tendência linear de uma variável independente. A precisão das equações foi avaliada com base no coeficiente de determinação, erro médio relativo de precisão e índices: erro médio de bias, erro médio absoluto de bias e raiz do erro médio quadrado. A produtividade foi analisada a partir da emergência até o início do florescimento e do inicio ao fim da colheita. A produtividade de pepino foi 18% menor em relação a media multianual dos anos 1966-2005 cada 1,5-2 anos -n...

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“…Τα ενδιάμεσα προσομοιώματα (Jolliet et al 1991) (Liebig, 1985, Schapendonk και Gaastra 1984, Marcellis 1994), το μαρούλι (Sweeney et al 1981), το ραπανακι (Krug και Liebig 1979), το τριαντάφυλλο (Lieth και Pascian 1991) και την τομάτα (Hoogenboom 1980, Kano και van Bavel 1988, Elwell και Bauerle 1990, Jones et al 1991, de Koning, 1994. Τέλος ένα περιεκτικό και γενικό μοντέλο για την προσομοίωση της φωτοσύνθεσης και της παραγωγής του ξηρού βάρους στις θερμοκηπιακές καλλιέργειες έχει αναπτυχθεί από τον Gijzen (1992).…”

Section: τύποι κλιματικών προσομοιωμάτωνunclassified

Ανάπτυξη Βιοφυσικού Προσομοιώματος Καλλιέργειας Τομάτας Για Βελτιστοποίηση Της Διαχείρισης Του Κλίματος Σε Μεσογειακά Θερμοκήπια Κατά Τη Χειμερινή Περίοδο

Δημόκας¹,

Dimokas²

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Model of Cucumber Growth and Yield Ii. Prediction of Yields

Cited by 4 publications

References 0 publications

Unfavourable thermal conditions of air at the turn of the 20th and 21st centuries reducing crop productivity of pickling cucumber (Cucumis sativus L.) in Poland

Unfavourable thermal conditions of air at the turn of the 20th and 21st centuries reducing crop productivity of pickling cucumber (Cucumis sativus L.) in Poland

Risk of field cultivation of pickling cucumber caused by unfavorable sunshine duration conditions

Ανάπτυξη Βιοφυσικού Προσομοιώματος Καλλιέργειας Τομάτας Για Βελτιστοποίηση Της Διαχείρισης Του Κλίματος Σε Μεσογειακά Θερμοκήπια Κατά Τη Χειμερινή Περίοδο

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