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Showing 1 to 20 of 41 for “"lactuca sativa"”.
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Influence of diesel spillage on the productivity of ipomoea batatas and lactuca sativa
… growth and dry matter partitioning in Lactuca sativa (crisp head variety) and Ipomoea batatas (dagga variety) were studied at two diesel concentration ranges 0-30 and 0-6 ml/kg soil. The first experiment tested the effects of diesel concentration and age of diesel contamination in soil …
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Inheritance of Resistance to Tomato Spotted Wilt Virus in Lettuce (Lactuca Sativa L.)
Tomato Spotted Wilt Virus (TSWV), a thrips transmitted virus disease with a wide host range, has become a major limiting factor in lettuce production in Hawaii. Symptoms of this disease on lettuce are necrotic spotting of young leaves, stunting, wilting, and death of the plant. The large host range …
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Physiological Studies on Nitrate Absorption and Accumulation in Lettuce (Lactuca Sativa L.) Genotypes
Made available in DSpace on 2014-12-16T20:45:20Z (GMT). No. of bitstreams: 1 8908684.pdf: 4598257 bytes, checksum: 01a6e2bf3309b072975d1d75575f467c (MD5) Previous issue date: 1988
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Respostas fisiológicas e bioquímicas de Lactuca sativa cv Hanson submetida ao arsenato (AsV) e arsenito (AsIII)
… por esse metalóide. Assim, plantas de alface (Lactuca sativa cv Hanson) foram expostas a diferentes concentrações de AsV e AsIII, 0,0; 6,6; 13,2; 26,4 e 52,8 μmol L-1, por três dias. Foram avaliados o acúmulo e a distribuição de As em raízes e folhas e o efeito no crescimento vegetal, nas …
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Investigating the molecular genetic basis of antioxidants in lactuca sativa for the enhancement of its nutritional qualities
… nutritional content of species such as Lactuca sativa. This project aimed to use natural resources for the enhancement of lettuce nutritional properties through the introgression of genes from a close relative of L. sativa. Initially, the total antioxidant content of baby lettuce leaves …
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Contaminação, crescimento e inativação de microrganismos na cadeia de produção de alface (Lactuca sativa L.) variedade Vitória de Santo Antão
Foi analisada a cadeia de produção da alface, cultivar Vitória de Santo Antão, do campo à mesa, sob as diretrizes do sistema Análise de Perigo se Pontos Críticos de Controle(APPCC)e do sistema de Análise de Risco Microbiológico. Para este estudo realizaram-se as etapas: caracterização da superfície …
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Investigating optimum wavelength(s) for growth of Lactuca sativa, L. using tunable LED sources and developing thin-film filters for glass greenhouses
… on a sample plant species of lettuce (Lactuca sativa, L.). Whilst lettuce is often grown in hydroponic systems, the current research is conducted in stand-alone pots with hand watering, due to the requirements of health and safety and available resources. The experiments were designed …
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Nitrate accumulation in hydroponically-grown lettuce cultivars and relationship to nitrogen supply
… and reduction in hydroponically-grown lettuce (Lactuca sativa L.), and its relationship to various aspects of N supply, including solution NO$\sb{3-}$ concentration, the nitrate:ammonium solution ratio, and the interaction between solution flow rate and NO$\sb{3-}$ fertilization level.
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The effect of homoeopathic Ozonum in various potencies on growth and yield of the Lollo Bionda Lobi cultivar of leafy lettuce (lactuca sativa) cultivated in a closed hydroponic system
Mini-dissertation submitted in partial compliance with the requirements of the Master’s Degree in Technology: Homoeopathy, Durban University of Technology, Durban, South Africa, 2012.
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Compartmental Analysis of Roots in Intact Rapidly-Growing Spergularia Marina and Lactuca Sativa: Partial Characterization of the Symplasms Functional in the Radial Transport of Sodium Ion and Potassium Ion
… roots of rapidly-growing Spergularia marine and Lactuca sativa. Using large numbers of plants short time-courses of uptake and chase, $\sp{42}$K$\sp+$ and $\sp{22}$Na$\sp+$ transport could be resolved, even during a chase following a brief 10 minute labeling period. The use of intact plant …
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Posouzení vlivů běžně používaných hasiv na vybrané složky životního prostředí
… Folsomia candida, vyšší rostlina salát setý Lactuca sativa a žížala hnojní Eisenia fetida. Pro ověření platnosti výsledků byly provedeny referenční testy s příslušnými standardy. Z výsledků testů byly vypočteny hodnoty IC50, LC50 a EC50, prostřednictvím kterých byl posouzen vliv jednotlivých …
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The response of 'Buttercrunch' lettuce to applications of cyanobacterium (Nostoc muscorum) in nutrient solution
… of nitrogen fertilizer on the growth of lettuce (Lactuca sativa L. cv. Buttercrunch). Lettuce yields increased with increased rates of N. Yields were significantly greater in treatments containing 165 ppm N with N. muscorum culture added (at the rate of 33.3% by volume) than in treatments …
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Influencia de la aplicación de bocashi y lombriabono en el rendimiento de calabacin (Cucurbita pepo L.), espinaca (Spinacia oleracea L.), lechuga (Lactuca sativa L.) y remolacha (Beta vulgaris L.), bajo el método de cultivo bíointensivo, San Ignacio, Chalatenango.
… L.), espinaca (Spinacia oleracea L.), lechuga (Lactuca sativa L.), remolacha (Beta vulgaris L.), manejándolos con el método de cultivo biointensivo, que es una forma de agricultura orgánica a pequeña escala, cuyo propósito es desarrollar una agricultura integral y armónica con la naturaleza, en …
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The effects of biochar on soil mineral availability
… (Luvisol & Calcisol) present in Malta, in which Lactuca sativa was cultivated in pots in a greenhouse experimental setup for 7 weeks. The key findings of the study demonstrated that Lactuca sativa crops grown in biochar amended soils contained more H2O but lower nutrients quantity than the plants …
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ΣΥΝΕΙΣΦΟΡΑ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΟΙΚΟΦΥΣΙΟΛΟΓΙΑΣ ΤΟΥ ΓΑΣΤΕΡΟΠΟΔΟΥ ΠΝΕΥΜΟΝΟΦΟΡΟΥ HELIX LUCORUM L.
… RATE (A/I) IS GREATERWHEN IT IS FED WITH LACTUCA SATIVA AND LESS WHEN IT IS FED WITH URTICA DIOICA OR PETASITES ALBUS; ITS COEFFICIENT OF GROWTH EFFICIENCY (P/I) AND ITS COEFFICIENT OF ECOLOGICAL EFFICIENCY (P/A) ARE GREATER WHEN IT IS FED WITH P. ALBUS ANDLESS WHEN IT IS FED WITH U. …
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Effect of airflow and carbon dioxide on growth, yield, and gas exchange of lettuce
Romaine lettuce (Lactuca sativa var. longifolia L.) was grown hydroponically inside a walk-in growth chamber (Conviron, PGW36) with two levels of airflow (0.36 and 2.50 m$\rm\cdot s\sp{-1})$ at different atmospheric CO$\sb2$ concentrations (350 and 700 $\rm\mu mol\cdot mol\sp{-1}).$ A combination …
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Dynamic Environmental Control of a Vertical Farm for Lettuce Production
… and dry shoot masses of red colored lettuce (Lactuca sativa L. cv. ‘Rouxaï’), along with light use efficiency and electrical use efficiency, were used to evaluate the proposed dynamic light control strategies for growth, while anthocyanin concentration, tipburn severity score, and crop quality …
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