Main Article Content
A field experiment was carried out at Kapgari village of Jhargram district of West Bengal, to study the effects of NPK, humic acid and zinc sulphate on the growth and yield of African marigold (Tagetes erecta L.), during the year 2018 and 2019. The experiment included three treatments with ten replications were designed in Randomized Block Design. First treatment (T1) was with the recommended doses of NPK (120: 120: 100 kg/ha). Second treatment (T2) was to apply fertigation of 75% of the recommended doses in three splits whereas the third treatment (T3) was to apply fertigation of 75% of the recommended doses in five splits along with foliar application (30 and 45 days after planting) of humic acid (0.2%) and Zinc Sulphate (0.2%). Results revealed that the plants treated with T3 found to have maximum plant height (67.6 cm), plant spread (45.2 cm2) and number of branches per plant (27.2) as well as the number of flowers plant-1 (21.7), flower diameter (5.4 cm), individual flower weight (6.6 g) and yield of flower (230.6 q/ha) were also found highest by applying the same.
Yadav LP, Bose TK. Effect of planting time, plant density and nutrition on growth and flowering in marigold. South Indian Horticulture. 1998; 45(3):222-225.
Zhang W, Li X, Chen F, Lu J. Accumulation and distribution characteristics for nitrogen, phosphorus and potassium in different cultivars of Petunia hybrid Vlim. Science in Horticulture. 2012; 141:83-90.
Pandey RK, Mishra A. Effect of nitrogen, phosphorus and potassium on growth, flowering and seed yield in marigold cv Pusa Narangi Gainda. Progressive Horticulture. 2005; 37(2):341-344.
Balakrishnan V, Jawaharlal M, Senthil Kumar T, Ganga M. Response of micro-nutrients on flowering, yield and xanthophylls content in African marigold (Tagetes erecta L.). Journal of Ornamental Horticulture. 20017; 10(3):153-156.
Ahmad, S., Khan, J., Jamal, A. Response of pot marigold to different applied levels of humic acid. Journal of Horticulture and Plant Research. 2019; 5:57-60.
Seadh SE, El-Hendi MH, Abd El-Aal HA, El-Sayed SO. Effect of NPK rates and humicacid applications on growth of Egyptian cotton. J. Plant Production. 2012; 3:2287-2299.
Atiyeh RM, Edwards CA, Metzger JD, Lee S, Arancon NQ. The influence of humicacids derived from earth worm processed organic wastes on plant growth, Bioresour. Technol. 2002; 84:7–14.
Arancon NQ, Lee S, Edwards CA, Atiyeh R. Effect of humic acids derived from cattle, food and paper-waste vermicompost on growth of green house plants. Pedobiologia. 2003; 47:741-744.
Neary PE, Starlie CA, Paterson JW. Fertilization requirements for drip irrigation bell pepper grown on loamy sand soils. Proc. Fifth International microirrigation congress, Florida. 1995; 187-193.
Sindhu SS, Yamdagni R. Influence of different combination of nitrogen, phosphorus and potassium on vegetative growth parameters of Hybrid Tea rose cv. Super Star. Haryana J. Hort. Sci. 1992; 21(3-4):146-151.
Avari AF, Patel BM. Effect of spacing and nitrogen levels on growth, flowering and yield of African marigold (Tagetes erecta L.) cv. Lemon. M. Sc. Thesis abstracts, Chaudhry Charan Singh Haryana Agricultural University, Hissar, India. 1993; XIX(1).
Kulikova NA, Perminova IV, Badun GA, Chernysheva MG, Koroleva OV, Tsvetkova EA. Estimation of uptake of humic substances from different sources by escherichia coli cells under optimum and salt stress conditions by use of tritium-labeled humic materials. Appl. Environ. Microbial. 2005; 76:223-230.
Ahmad M, Khan MF, Hamid A, Hussain A. Effect of Urea, DAP and FYM on growth and flowering of Dahlia (Dahlia variabilis). International Journal of Agriculture and Biology. 2004; 6(2):393-395.
Ricardo R, Raymond P, Poincelot Graeme PB. The use of a commercial organic Biostimulant for improved production of marigold cultivars. Journal of Home & Consumer Horticulture. 1993; 1:83-93.
Kaya M, Atak M, Khawar KM, Çiftçi CY, Ozcan S. Effect of pre-sowing seed treatment with zinc and foliar spray of humic acid on yield of common bean (Phaseolus vulgaris L.). International Journal of Agriculture and Biology. 2005; 7: 875-878.
Nikbakht A, Kafi M, Babalar M, Xia YP, Luo A, Etemadi N. Effect of humic acid on plant growth, nutrient uptake, and postharvest life of gerbera. Journal of Plant Nutrition. 2008; 31:2155-2167.
Baldotto MA, Baldotto LEB. Gladiolus development in response to bulb treatment with different concentrations of humic acids. Revista Ceres. 2013; 60:138-142.
Haghighi M, Kafi M, Fang P. Photosynthetic activity and N metabolism of lettuce as affected by humic acid. International Journal of Vegetable Science. 2012; 18:182-189.