Nutritional deficiency in crisphead lettuce grown in hydroponics
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چکیده
منابع مشابه
DRIS Evaluation of the Nutritional Status of Crisphead Lettuce
Diagnosis and Recommendation Integrated System (DRIS) norms were derived for crisphead lettuce (Lactuca sativa L.) from field fertility experiments conducted over the past 20 years on mineral and organic soils in Florida. Preliminary testing indicates that DRIS diagnoses generally agree with diagnoses using the sufficiency range approach, with the advantage of predicting the degree of nutrient ...
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Introduction: Iron deficiency (ID) is the most prevalent nutritional disorder in the world. The prevalence of iron deficiency anemia (IDA) is about 9% in toddlers, 9-11% in adolescent girls and less than 1% in teenage boys. IDA presents when there is not sufficient iron for haemoglobin synthesis. In particular it has negative effects on the behavior, cognitive performance, immune system and phy...
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An experiment was carried out to evaluate the effect of various concentrations of Mg (0, 1, 2, 3 and 4 mM) in the nutrient solution and shading (0 and 50%) on growth, yield, fruit quality and physiological properties in hydroponically grown cucumber (Cucumis sativus L. cv. Nagen 792). With increased Mg concentration in both shaded and unshaded plants, the total plant leaf area and dry weight of...
متن کاملBacteriological quality of organically grown leaf lettuce in Norway.
AIM To investigate bacteriological quality in organically grown leaf lettuce, including the presence of selected pathogenic bacteria, and to obtain information about organic lettuce production, including fertilizing regimes. METHODS AND RESULTS Altogether 179 samples of Norwegian organically grown lettuce were collected from 12 producers. Escherichia coli was isolated from 16 of the lettuce s...
متن کاملPossible Internalization of an Enterovirus in Hydroponically Grown Lettuce
Several studies have shown that enteric viruses can be transferred onto the surface of vegetables and fruits through spray irrigation, but, recently, reports have suggested viral contamination of vegetables sub-irrigated with reused wastewater. Hydroponic cultures, used to grow ready to eat fresh lettuce, have also been used to study the possibility of viral absorption through roots. This study...
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ژورنال
عنوان ژورنال: Horticultura Brasileira
سال: 2014
ISSN: 1806-9991,0102-0536
DOI: 10.1590/s0102-05362014000300012