The potential of biofertilizers to improve vegetative growth, nutritional status, yield and fruit quality of flame seedless grapevines.

摘要

Applying biofertilizers has been a good strategy in controlling chemical fertilization, reducing environmental pollution and obtaining safe produce. This investigation was initiated as an attempt for replacing the excessive application of mineral fertilizers partially with three biofertilizers namely Nitrobeine, Phosphorein and Halex for achieving an economical yield and improving vegetative growth of Flame seedless grapevines. The treatments were 100% of recommended mineral fertilizers dose/tree without microbial biofertilization (control) and 100% (T1), 75% (T2), 50% (T3) and 25% (T4) of recommended mineral fertilizers dose plus biofertilizers. Generally, results proved that shoot length, leaf area of treated trees with microbial biofertilization were significantly increased. All microbial fertilization treatments markedly affected leaf petiole nutrient element contents of Flame seedless grapevines. Leaf petiole nutrient element contents of N, P and K were increased in a significant manner. As for yield, clusters weight and berries quality, yield and clusters weights were significantly increased as microbial biofertilization were applied. T2 and T3 treatments recorded the highest yield and clusters weight. At the same time T2 produced high values of TSS % whereas T3 produced high values of acidity in comparison with the other treatments. At the end of the experiment, (T2) significantly increased remaining soil N as compared with control treatment.