Accurate and rapid technique for leaf area measurment in medlar (Mespilus germanica L.)

A model to estimate medlar (Mespilus germanica) leaf area across genotypes was obtained by means of linear measurements in 2005-06

Accurate and rapid technique for leaf area measurement in medlar (Mespilus germanica L.)

Accurate measurements of leaf area are important for agronomic and physiological studies. Deter- mining the individual leaf area (A) of medlar (Mespilus germanica L.) involves measurements of leaf parameters, such as length (L) and width (W), or some combinations of these parameters. A two-year investigation was car- ried out in 2005 (on seven genotypes) and in 2006 (on one cultivar) underopen-field conditions to test whether a model could be developed to estimate leaf area across genotypes. Regression analyses of A versus Land Wrevea- led several models could be used for estimating the area of individual medlar leaves. A linear model having LW as the independent variable (A = 1.81 + 0.68 LW) provided the most accurate estimate (R2 = 0.981, MSE = 7) of medlar leaf area. Validation of the model having LWof leaves from another genotype measured in the 2006 expe- riment showed that the correlation between calculated and measured areas was very high. Using the selected model, agronomists and physiologists can accurately and reliably estimate the leaf area of medlarwithout the use of expensive instruments

Influenza delle proporzioni dei macronutrienti nella soluzione e della stagione di coltivazione su produttività e qualità della lattuga coltivata in idroponica

Plants of Lactuca sativa L. var. acephala cv ‘Green Salad Bowl’ were grown in a in floating system during spring and summer season to investigate the influence of macro-anion (NO3 -, H2PO4 -, and SO4 2- ) and macro-cation (K+, Ca2+, and Mg2+) proportions in the nutrient solut ion on yield and leaf qual i ty. Marketable yield, shoot biomass and leaf area index were unaffected by nutrient solution composition. A high proportion of calcium in the nutrient solution increased the quality attributes in particular calcium, chlorophyll, and carbohydrate concentrations. Plants grown in the spring season exhibited a lower yield, growth (total dry biomass and leaf area index), leaf mineral content (N, K, and Mg), total carotenoids and water use efficiency than those grown in the summer season but influenced positively some quality parameters (higher content of carbohydrate and lower nitrate content)

Non-destructive, analogue model for leaf area estimation in Persimmon (Diospyros kaki L.f.) based on leaf length and width measurements

A non-destructive method for the determination of leaf area by means of leaf linear measurements was define

Leaf area estimation model for small fruits from linear measurements. HortScience

Models were defined that accurately estimate the leaf area of small fruits (raspberry, gooseberry, blackberry, highbush blueberry and currants