Influences of Bacilus suptilis and Trichoderma harzianum to productivity and fruits quality of strawberry cultivar 'Clery'

Abstract

In the study were examined an influence of different microorganisms to improve yield and quality of fruits strawberry cultivar ‘Clery’. The microbiological preparations were applied by drip irrigation system in doses of 5 l/ha, two and four weeks after planting, and also, next spring four and two weeks from the expected beginning of blooming. The following properties of productivity were analyzed: the number of crowns per plant, diameter of crowns, the number of inflorescences per crowns, the number of fruits per inflorescence, the total number of fruits per plants and the yield per plants (total and separately per harvesting in kg). According UPOV Code for strawberry the following phenological properties were studied. Plants treated with T. harzianum had significantly higher and numbers of inflorescences per crowns. A percentage of harvested fruits in first harvest, in regard to total fruits per plants, were between 19.5% (control plants) to 25.3% (B. suptilis). In the second harvest, to all treatments were recorded an increased yield of harvested fruits compared to first harvest. A total yield of marketable fruits per plants ranged between 0.38 kg (control) to 0.56 kg (T. harzianum). The highest content of TSS had fruits from plant treated with T. harzianum (10.7%), while the lowest had fruits treated with B. suptilis (10.2%). In the first harvest values of ascorbic acids in fruits ranged between 32.6 mg to 35.2 mg. Fruits from control plants had significantly higher values of AA. Generally, fruits from the second harvest had a decreased of contents of chemical properties.