The effect of microbial organic fertilizer on some biochemical indicators, on the productivity and quality of Korean zucchini (Cucurbita pepo L.) planted in soil of Kontum city
Abstract
The experiment was arranged in a completely random block design, consisting of 5 formulas, with level 0; 0.5; 1.0; 1.5; 2 tons/ha of microbial organic fertilizer. Experimental results showed that supplementing micro-organic fertilizer for Korean zucchini grown in soil of Kontum at 0.5 tons - 2.0 tons/ha increased the rate of fructification, number of fruits per tree, increased size and fruit weight. Fruit weight and fruit size increased the most at 1.5 tons/ha. The actual yield of fruit achieved in the formulas of adding more organic fertilizers increased from 1.49 tons to 4.62 tons/ha in comparison with that of the control, increasing the highest at 1.5 tons/ha (reaching 25.5 tons/ha). Applying microbial organic fertilizer also positively affects chlorophyll content in leaves, total sugar content and content of vitamin C in fruit. The highest increase is at the level of 1.5 tons/ha of micro-organic fertilizer. The content of calcium and fiber in fruits has little difference between the formulas of adding microbial organic fertilizer compared to the control.