RESEARCH ON RESTORING THE HA TRUNG GLUTINOUS CUCUMBER VARIETIES AND THE EFFECT OF PROTEIN AND POTASSIUM DOSAGE ON THE YIELD AND FRUIT QUALITY AFTER RESTORATION

Abstract

Research on restoring the Ha Trung cucumber variety was conducted from 2021 to 2023 employing the improved population selection method for cross-pollinated plants. The results showed that the restored cucumber variety has the following agronomic traits:  leaf blade of yellow-green color, fruit skin of bright green color, fruit thorn of dark brown color, medium thorn density, high fruit uniformity. The average number of fruits per tree is 5 - 7 fruits/tree. The average fruit weight is 150 - 170 g per fruit. The average fruit length is 15.0 - 17.0 cm. The average fruit diameter is 3.5 - 4.5 cm. The average fruit flesh thickness is 0.9 - 1.0 cm. Study on the effect of nitrogen and potassium application rate on yield and fruit quality after restoration in Ha Giang commune, Ha Trung district, Thanh Hoa province in the autumn - winter crop 2022 and the spring - summer crop 2023. The results determined that the fertilization rate of 150 kg N + 120 kg K₂O with base fertilizer of 20 tons of manure (2 tons of organic microbial fertilizer) + 90 kg P₂O₅ was more appropriate, giving the highest yield (autumn - winter crop yielded 40.6 tons/ha and spring - summer crop reached 37.4 tons/ha), achieving high quality as well as ensuring food hygiene and safety.