Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 1
Written by Nicolae LASCU, Ramona CĂPRUCIU, Liviu Cristian MĂRĂCINEANU, Marieta PLOAE
The foliar fertilization with Folibor on the culture of watermelons influenced the physiological indexes of the plants as following: the activity of the catalase enzyme presented a low decrease by reducing the chemical and mineral fertilizers’ doses at half and by applying the fertilizer-stimulator Folibor to the vegetation. Thus the values ranging from 25.6 to 24.9 ml KMnO4 n/10 on the grounds with chemical fertilization, respectively from 25.6 to 25.0 ml KMnO4 n/10 on the grounds with organic fertilization. The chlorophyll pigments recorded higher values for variants where there were applied foliar fertilizers which were based on organic compounds of boron while the chemical and organic fertilizers were reduced by half, the chlorophyll (a+b) presented an increase from 2.27 to 2.99 mg/g FW through reducing the chemical fertilizers, respectively from 4.00 to 4.31 mg/1 g in the case of the organic ones. The intensity of photosynthesis was influenced by foliar fertilization and also by chemical and organic one. The photosynthesis rate recorded a maximum value at the variant treated with organic fertilizers (30 t/ha) (V3) and at the vegetation treated with Folibor (V7).
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