Hazarika, BikashSAHU, MUKESH KUMAR2024-07-052024-07-052023https://krishikosh.egranth.ac.in/handle/1/5810211508The present investigation was carried out in the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat during the period of 2021-2023 to study the “Standardization of organic nutrient dose and plants per pole in dragon fruit”. The experiment was laid out in factorial randomized block design with three replications, consisting of two factors i.e. nutrient level and number of plants per pole. The four levels of nutrient during first year were N1 (FYM @ 15kg + VC @ 5kg + RP @ 200gm + PSB @ 100gm), N2 (FYM @ 15kg + EC @ 5kg), N3 (FYM @ 15kg + MOC @2kg + RP @ 200gm + PSB @ 100gm) and N4 (FYM @ 15kg + MOC @ 2kg + EC @ 2kg) were applied and during second year N1 (FYM @ 20kg + VC @ 10kg), N2 (FYM @ 20kg + EC @ 10kg), N3 (FYM @ 20kg + MOC @ 4kg) and N4 (FYM @ 20kg + MOC @ 4kg + EC @ 4kg) were maintained along with three different number of plants per pole i.e., P1 (two plants), P2 (three plants), P3 (four plants) were selected. The treatment consist of twelve different treatment combinations i.e. T1 (P1N1), T2 (P1N2), T3 (P1N3), T4 (P1N4), T5 (P2N1), T6 (P2N2), T7 (P2N3), T8 (P2N4), T9 (P3N1), T10 (P3N2), T11 (P3N3) and T12 (P3N4), respectively. The results of the experiments revealed that effect of different treatments showed statistically significant effects on plant growth, quality, biochemical analysis and soil parameters. However, the maximum plant growth parameters viz., plant height (cm), flower per pole (nos.), fruit per pole (nos.) and yield (t/ha) were recorded in the treatment T9 i.e. application of FYM @ 15kg + VC @ 5kg + RP @ 200gm + PSB @ 100gm during first year and application of FYM @ 15kg + EC @ 10kg during second year with four plants per pole. While, minimum plant height (cm) was observed in T12 i.e. application of FYM @ 15kg + MOC @ 2kg + EC @ 2kg during first year and FYM @ 20kg + MOC @ 4kg + EC @ 4kg with four plants per pole and minimum number of flower per pole (nos.), fruit per pole (nos.) and yield (t/ha) were recorded in the treatment T3 i.e. P1N3 (application of FYM @ 15kg + MOC @2kg + RP @ 200gm + PSB @ 100gm during first year and application of FYM @ 20kg + MOC @ 4kg during second year with two plants per pole, respectively. There was no significant difference among different treatment combinations for biochemical parameters like reducing sugar, total sugar, total soluble sugar, ascorbic acid and titratable acidity (%) of fruits. The maximum TSS value (15.36 and 15.80 °Brix), ascorbic acid (7.80 and 8.26 %) and titratable acidity (0.078 and 0.067 %) were recorded in the treatment T1 (P1N1), during both the years. The highest B:C ratio 5.73 was found in treatment T9 (P3N1) followed by 5.11 in T11 (P3N3).EnglishThesis