Kotoky, UtpalPathak, Nishita2023-12-132023-12-132021https://krishikosh.egranth.ac.in/handle/1/5810202819An investigation on ―Standardization of organic inputs in pineapple cv. ‗Kew‘‖ was conducted during the year 2018 - 2020, in the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat. The field experiment was laid out in Factorial Randomized Block Design (RBD) with ten treatments replicated three times. The ten different treatments were FYM @ 5 tonnes/ha + Wood ash @ 0.8 tonnes/ha (T1), FYM @ 10 tonnes/ha + Wood ash @ 0.8 tonnes/ha (T2), Vermicompost @ 2.5 tonnes/ha + Wood ash @ 0.8 tonnes/ha (T3), Vermicompost @ 5 tonnes/ha + Wood ash @ 0.8 tonnes/ha (T4), T1 + Microbial Consortium @ 20 kg/ha (T5), T2 + Microbial Consortium @ 20 kg/ha (T6), T3 + Microbial Consortium @ 20 kg/ha (T7), T4 + Microbial Consortium @ 20 kg/ha (T8), Microbial Consortium @ 20 kg/ha (T9) and RDF (T0, control). The results so obtained showed that, reproductive and quality parameters were significantly influenced by the various treatments. Among the various treatments, T8 was found to be the best in increasing the growth parameters viz., plant height (103.18 cm) at 360 DAP, number of leaves (70.00) at 540 DAP, length of ‗D‘ leaf (67.47 cm), breadth of ‗D‘ leaf (5.37 cm), leaf area (291.38 cm2), leaf area index (2.65), shoot and root ratio (12.23), root length (46.57), number of flower per inflorescence (91.89) and also earliness in flowering was observed. Fruit weight with crown (1.78 kg), fruit weight without crown (1.54 kg), fruit length (15.94 cm), fruit breadth (13.15 cm), fruit volume (1228.52 cc) and fruit yield (56.07 t/ha) were also found to be significantly higher in treatment T8. Similarly in case of quality parameters viz., TSS (15.93 °Brix), reducing sugar (5.63 %), total sugar (9.75 %), ascorbic acid (26.16 mg/100g) and moisture percentage (87.12) recorded significantly higher values in treatment T8. Regarding nutrient status of the soil the results revealed that, the available N (270.84 kg/ha), P (60.02 kg/ha) and K (138.65 kg/ha), organic carbon (0.92 %), soil pH (5.56), microbial biomass carbon (500.67 μg g-1 soil), microbial population viz., bacteria (7.27 log cfu g-1 soil) and fungi (5.01 log cfu g-1 soil) and soil enzyme activity i.e, Dehydrogenase (179.01 μg TPF g-1 soil 24 hour-1), Phosphomonoesterase (342.62 μg pnitrophenol g-1 hour-1) and Fluorescein di-acetate (6.90 μg fluorescein g-1 h-1) were found to be significantly higher in treatment T8. Based on the results obtained during the investigation, it can be concluded that, pineapple plants cv. Kew when applied with Vermicompost @ 5 tonnes/ha + Wood ash @ 0.8 tonnes/ha + Microbial Consortium @ 20 kg/ha (T8) resulted in better growth with improved fruit quality and higher benefit: cost ratio (3.03).EnglishThesis