STUDYING THE EFFECTS OF SOME ORGANIC FOLIAR FERTILIZERS ON GROWTH, YIELD, AND ECONOMICAL EFFICIENCY OF F1 KIM HOANG HAU HYBRID MUSKMELON VARIETY GROWED IN A SHELTERED HOUSE AT LAM SON HI-TECH AGRICULTURAL ZONE, THANH HOA PROVINCE

Abstract

Studying the effects of some organic foliar fertilizers on the growth, yield and economic efficiency of F1 Kim Hoang Hau hybrid muskmelon variety in a sheltered house in Lam Son Hi-tech Agricultural zone, Thanh Hoa province. The experiments consisted of 4 treatments, 4 replicates, randomized block design (RCBD), in the Spring-Summer crop, 2022. The treatment CT1 (Control): Water spray; The treatment CT2: Seaweed mineral organic foliar fertilizer; The treatment CT3: High-grade organic fertilizer HLC 16; The treatment CT4: Comcat from A to Z. The result showed that in the Spring-Summer crop of 2022, the treatment CT3 (High-grade organic fertilizer HLC16) achieved total  growing time (76 days), the plant height (229.30 cm/ the main stem), the number of leaves (24.3 leaves/the main stem), number of pollinated flowers (5,2 flowers/plant),  number of the male flowers (18.2), number of pods (2.3 fruits/plant) and fruit set ratio (2.3 fruits/tree),  fruit weight (1.81 kg/fruit),  individual yield (1.81 kg/tree),  theoretical yield (36.2 tons/ha), actual yield (28.96 tons/ha), commercial yield (24.62 tons/ha) reached the highest, followed by the treatment CT4, CT2 and the lowest index were the treatment CT1 (control-spray water). The treatment CT3 obtained the highest total net profit and MBCR of 14.5. Therefore, it is recommended to apply the fertilizer of high-grade organic fertilizer HLC 16 (the treatment CT3 ) for the production of F1 Kim Hoang Hau hybrid muskmelon in a sheltered house.