ISHS Acta Horticulturae 567: IV International Strawberry Symposium
LEAF NUTRIENT LEVELS OF STRAWBERRIES (CV. TUDLA) IN RELATION TO CROP YIELD |
| Authors: | D. Almaliotis, D. Velemis, S. Bladenopoulou, N. Karapetsas |
| Keywords: | Nutritional status, fruit yield, regression analysis, standard deviation |
| Abstract:
Cold stored plants (cv. Tudla) were planted at the end of July 1998 in Northern Greece and covered with polyethylene tunnel in January 1999. Fertilizers were applied as required by soil analysis. Leaf analysis was carried out during full bloom stage in February. The yield ranged from 25 to 35 t/ha, with a standard deviation (sd) of 3.5 t/ha and a mean yield 30 t/ha. Multiple regression analysis revealed that yield was closely related to leaf mineral content (r2 = 0.9827). By applying a stepwise variable selection program, K leaf content was found to be the most important variable for yield prediction (r2 = 0.9853). Moreover, sufficiency leaf nutrient ranges were defined as follows: a) Macronutrients (%): N 2.07-3.04, P 0.20-0.38, K 1.84-2.21, Ca 0.77-1.48, Mg 0.25-0.70 and b) micronutrients (ppm): B 12.0-25.0, Mn 45.0-121.0, Zn 15.0-33.0, Fe 58.0-114.0 and Cu 3.0-22.5. | |
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