STUDIES ON THE EFFECT OF LIQUID BIOFERTILIZERS, FERTIGATION, MULCHING AND BIOSTIMULANTS ON GROWTH, FLOWER QUALITY AND YIELD OF MARIGOLD (Tagetes erecta L.) Cv. PUSA NARANGI GAINDA

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Date
2018-05-25
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College of Horticulture, Rajendranagar, HYD-30
Abstract
A field experiment entitled - “Studies on the effect of liquid biofertilizers, fertigation, mulching and biostimulants on growth, flower quality and yield of Marigold (Tagetes erecta L.) cv. Pusa Narangi Gainda” was conducted during Rabi 2015-16 & 2016-17 at Floriculture Research Station, ARI, Rajendranagar, Hyderabad, Southern Telangana Agro climatic Zone of Telangana State. The soil of experimental field was of sandy loam type with a soil pH of 7.9 and Electrical conductivity of 0.169 ds/m, available Nitrogen was 184 kg ha-1, Phosphorous was 24.3 kg ha-1 and Potassium was 176 kg ha-1. Sand (%) is 79.5 with silt of 6.6% and clay 13.9%. In Rabi 2015-16 and 2016-17, crop was sown to conduct three experiments, where in the first experiment was conducted to study the effect of liquid biofertilizers with different levels of inorganic fertilizers on growth, yield and quality of Marigold with 13 different treatments in Randomized Block Design with three replications. In two years of field study, it was found that out of the thirteen treatments T7 (100 % N + 100 % P + 50 % K + liquid KSB) has improved the growth parameters viz., plant height (54.80 cm, 62.10 cm and 64.00 cm at 45, 60 and 90 DAT respectively), plant spread (25.30 cm, 33.30 cm and 38.70 cm at 45, 60 and 90 DAT respectively), number of branches (8.4), number of days to first bud initiation (28.50 days), 50% flowering (43.80 days) as well as yield parameters like total number of flowers (33.80), flower yield per plant (217.20 g), flower yield per hectare (15.20 t ha-1) and quality parameters like shelf life (4.0 days), nutrient uptake (NPK) in leaves (3.3%, 0.32% and 1.34% respectively) and B:C ratio (2.51) of marigold cv. Pusa narangi gainda compared to the other treatments. The second experiment was conducted for standardization of mulching and fertigation schedule with micronutrients on growth and yield of marigold in split plot design where mulches were considered as main treatments i.e., without mulch (M0), black plastic mulch 50 microns (M1) and reflective colour mulch 50 μ (silver & black) (M2), with four fertigation treatments as sub treatments i.e., Control 100% RDF (80kg N-80kg P2O5-80kg K2O + 10 t of FYM / ac) (F0), 100% RDF + 0.5% ZnSO4 + 0.1% boron + 1% CaNO3 + 1% MgNO3 (F1), 75% RDF + 0.5% ZnSO4 + 0.1% boron + 1% CaNO3 + 1% MgNO3 (F2) and 50% RDF + 0.5% ZnSO4 + 0.1% boron + 1% CaNO3 + 1% MgNO3 (F3) in three replications. During Rabi 2015-16 and 2016-17, reflective colour mulch 50 μ (M2) recorded maximum plant height (52.67 cm, 59.31 cm and 62.78 cm during 2015-16 & 59.16 cm, 62.11 cm and 64.85 cm during 2016-17 at 45, 60 and 90 DAT respectively), plant spread ( 32.19 cm, 34.54 cm and 37.19 cm during 2015-16 & 45.24 cm, 47.75 cm and 49.93 cm during 2016-17 at 45, 60 and 90 DAT respectively), number of branches (8.11 & 6.86), minimum number of days to first bud initiation (22.77 days & 26.10 days) and 50% flowering (48.31 days & 48.12 days) and recorded maximum yield parameters like total number of flowers per plant (39.01 & 42.55), flower yield per plant (205.1 g & 205.7 g) flower yield per hectare (15.85 t ha-1 & 15.96 t ha-1) and quality parameters like shelf life (4.21 days & 4.13 days), nutrient uptake (NPK) in leaves (3.26% , 0.34% and 1.35% during 2015-16 & 3.33%, 0.34% & 1.38% during 2016-17 respectively), carotenoid content (4.94 mg g-1 and 4.88 mg g-1 ) and B:C ratio (2.62) compared to other mulches during both the years of experiment. Among the sub treatments, F2 (75% RDF + 0.5% ZnSO4 + 0.1% boron + 1% CaNO3 + 1% MgNO3) performed well by recording maximum values of growth parameters, yield parameters and quality parameters when compared to F0, F1 and F3. The third experiment was conducted to study the effect of biostimulants on growth, yield and seed quality of marigold with seven treatments viz., control 100% RDF @ 80 kg NPK + FYM 10 t/ ac (T1), 75% of RDF +Fulvic acid 10% + seaweed extract 8% + spirulina 6% @ 3 gm/l (T2), 50% of RDF +Fulvic acid 10% + seaweed extract 8% + spirulina 6% @ 3 gm/l (T3), 75% of RDF + Humic acid 12% @ 3 ml/l (T4), 50% of RDF + Humic acid 12% @ 3 ml/l (T5), 75% of RDF + Potassium humate 95% @ 1.5 gm/l (T6), 50% of RDF + Potassium humate 95% @ 1.5 gm/l (T7) in Randomized Block Design with three replications. During both years, T7 (50% of RDF + Potassium humate 95% @ 1.5 gm/l) has performed well in recording maximum plant height (55.70 cm, 58.50 cm and 60.30 cm at 45, 60 & 90 DAT respectively), more number of branches (6.5), minimum number of days to first flower bud initiation (29.20 days) and number of days to 50% flowering (46.50 days) as well as yield parameters like total number of flowers (31.90), flower yield per plant (220.12 g), flower yield per hectare (14.70 t ha-1) and quality parameters like shelf life (4.06 days), number of seeds per gram (367.50), number of seeds per flower (365.50), seed germination percentage (86.60%) and seed vigour index (464.90) when compared to rest of the treatments.
Description
During both years, T7 (50% of RDF + Potassium humate 95% @ 1.5 gm/l) has performed well in recording maximum plant height (55.70 cm, 58.50 cm and 60.30 cm at 45, 60 & 90 DAT respectively), more number of branches (6.5), minimum number of days to first flower bud initiation (29.20 days) and number of days to 50% flowering (46.50 days) as well as yield parameters like total number of flowers (31.90), flower yield per plant (220.12 g), flower yield per hectare (14.70 t ha-1) and quality parameters like shelf life (4.06 days), number of seeds per gram (367.50), number of seeds per flower (365.50), seed germination percentage (86.60%) and seed vigour index (464.90) when compared to rest of the treatments.
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Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30
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