Effect of micro-organic fertilizers on some growth norms, yield and fruit quality of My Tho gourd variety grown in gravel soil of Hoai Huong, Hoai Nhon, Binh Dinh province
The study was carried out to evaluate the effect of micro-organic fertilizer (MOF) on growth, yield and quality of My Tho gourd variety grown in gravel soil of Hoai Huong commune, Hoai Nhon district, Binh Dinh province. This study used MOF at dosages of 400, 500 and 600 kg.ha-1. Experimental soil was analyzed in terms of pH (4,4), total organic matter, content of available nitrogen, and potassium at low level. The biochemical norms such as chlorophyll content, total nitrogen, protein, total sugar, and vitamin C were determined. The research results showed that the application of MOF at dosages of 400, 500, 600 kg.ha-1 increased some biochemical norms, productivity and fruit quality. Dry matter content in fruit increased from 0.15% to 1.48%, vitamin C increased from 0.20% to 5.29%, protein increased from 0.74% to 1.38%, total organic acids increased from 13.97% to 40.53% and Brix increased from 0.09% to 1.20%. The adding of MOF increased fruit productivity from 4.72 - 19.09 tons.ha-1 and the profit increased from 30.840 to 130.33 million VND, which was higher than that of the control without applying MOF. The best effect is at dosage of 600 kg.ha-1. Theresearch results recommend that gourd growers should use MOF to produce quality and safe products for consumers, and provide a raw material source for the food and beverage industry.