University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 35 2 2025 08 21 The effect of urban waste compost and bio-fertilizer on the growth characteristics and the amount of elements in L.A. Hybrid Lily (Longiflorum×Asiatic) The effect of urban waste compost and bio-fertilizer on the growth characteristics and the amount of elements in L.A. Hybrid Lily (Longiflorum×Asiatic) 203 215 20224 10.22034/saps.2023.57506.3076 FA Maryam Ahmadi Dept. of Horticultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Mahnaz Karimi Department of Horticultural Sciences, Faculty of crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Vida Chalavi َAssociate professor, Department of Horticulture, Sari Agricultural Sciences and Natural Resources University Journal Article 2023 07 12 <strong>Background and Objectives</strong><strong>:</strong> <strong>Nowadays, the use of organic materials and biofertilizers as substitutes for chemical inputs in agricultural production has gained importance.</strong><strong> The present study was conducted to investigate the effect of municipal waste compost and Barvar-2 phosphate biofertilizer on some growth characteristics and leaf nutrient content of lilies.</strong> <strong> </strong> <strong>Materials and Methods:</strong> The experiment was conducted as a factorial arrangement in a completely randomized design. The first factor consisted of different <strong>compost</strong> percentages (0, 25, 50, 75, and 100% by volume, replacing peat moss in the base substrate), and the second factor was the application or non-application of Barvar-2 phosphate biofertilizer. <strong>The lily bulbs of the 'Nashville' cultivar were immersed in the biofertilizer solution for three minutes and then planted in plastic pots containing different percentages of compost.</strong> When the first flower bud showed color, the following parameters were measured: stem height, number of buds, length of the longest root, fresh and dry root weight, number of bulblets, chlorophyll content, and the concentrations of nitrogen, phosphorus, potassium, and calcium. <strong> </strong> <strong>Results:</strong> The highest stem height and the length of the longest root were related to the application of biological fertilizer in the control bed. The highest number of buds was observed in the application of bio-fertilizer. Fresh and dry weight of roots in 50% compost in combination with bio-fertilizer was maximum. The highest amount of total chlorophyll was obtained in 25% of compost in combination with bio-fertilizer. In 100% compost, under the influence of bio-fertilizer, the highest amount of nitrogen was observed. The highest amount of leaf phosphorus was related to 50% of compost along with bio-fertilizer. <strong> </strong> <strong>Conclusion: </strong>According to the obtained results, the use of 25% <strong>municipal waste compost</strong> can replace peat moss. Bio-fertilizer is recommended to improve growth factors and increase the amount of leaf elements. <strong>Background and Objectives</strong><strong>:</strong> <strong>Nowadays, the use of organic materials and biofertilizers as substitutes for chemical inputs in agricultural production has gained importance.</strong><strong> The present study was conducted to investigate the effect of municipal waste compost and Barvar-2 phosphate biofertilizer on some growth characteristics and leaf nutrient content of lilies.</strong> <strong> </strong> <strong>Materials and Methods:</strong> The experiment was conducted as a factorial arrangement in a completely randomized design. The first factor consisted of different <strong>compost</strong> percentages (0, 25, 50, 75, and 100% by volume, replacing peat moss in the base substrate), and the second factor was the application or non-application of Barvar-2 phosphate biofertilizer. <strong>The lily bulbs of the 'Nashville' cultivar were immersed in the biofertilizer solution for three minutes and then planted in plastic pots containing different percentages of compost.</strong> When the first flower bud showed color, the following parameters were measured: stem height, number of buds, length of the longest root, fresh and dry root weight, number of bulblets, chlorophyll content, and the concentrations of nitrogen, phosphorus, potassium, and calcium. <strong> </strong> <strong>Results:</strong> The highest stem height and the length of the longest root were related to the application of biological fertilizer in the control bed. The highest number of buds was observed in the application of bio-fertilizer. Fresh and dry weight of roots in 50% compost in combination with bio-fertilizer was maximum. The highest amount of total chlorophyll was obtained in 25% of compost in combination with bio-fertilizer. In 100% compost, under the influence of bio-fertilizer, the highest amount of nitrogen was observed. The highest amount of leaf phosphorus was related to 50% of compost along with bio-fertilizer. <strong> </strong> <strong>Conclusion: </strong>According to the obtained results, the use of 25% <strong>municipal waste compost</strong> can replace peat moss. Bio-fertilizer is recommended to improve growth factors and increase the amount of leaf elements. https://sustainagriculture.tabrizu.ac.ir/article_20224_b2b2f3bb5e15ea28e85df7335e23e106.pdf