STUDY ON THE EFFECTS OF THE DENSITIES AND THE FERTILIZER DOSAGE NPK ON THE GROWTH, DEVELOPMENT, YIELD OF PASSION FRUIT DAI NONG 1 IN BA THUOC DISTRICT, THANH HOA PROVINCE

Abstract

Study on the effects of the densities and the fertilizer dosages NPKS on the growth, development, yields of passion fruit plant in the 2018 - 2019 season at Ba Thuoc district, Thanh Hoa. The results of our study showed that the density of M4 (1,100 trees/ha) has the shortest growing time of 255 - 265 days and the density of M1 (500 trees/ha) has the longest growing time of 258 - 272 days. When increasing the density and investing in fertilizer, passion fruit yield also increased, increasing to density of 900 plant/ha and fertilizer amount of 0.7 kg N + 0.5 kg P2O5 + 1.1 kg K2O/plant for the highest yield of 43.2 tons/ha. The formula M1P1 (500 plants/ha and no additional fertilizer) has the smallest actual yield of 18.7 tons/ha.