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20221
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Subject: Floriculture and Landscaping × Author: Bhobhria, Vimal × End date: 2023 ×
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    Studies on plant spacing and fertigation schedule for loose flower production of chrysanthemum (Chrysanthemum morifolium Ramat.)
    (Punjab Agricultural University, 2022) Bhobhria, Vimal; Madhu Bala
    The investigations entitled “Studies on plant spacing and fertigation schedule for loose flower production of chrysanthemum (Chrysanthemum morifolium Ramat.)” was carried out at Research Farm, Department of Floriculture and Landscaping and Soil and Water Engineering, PAU, Ludhiana during the year 2021-22 with the aim to standardize fertigation level and plant spacing for quality loose flower production. Four different fertigation levels of N@ (60kg/ha, 80kg/ha, 100kg/ha and 120kg/ha) were applied to two different chrysanthemum varieties namely „Punjab Shingar‟ and „Ratlam Selection‟ through drip irrigation along with three different spacings i.e.,40×30 cm, 40×40 cm and 40×60 cm. The statistical used was Split Plot Design (SPD) and trial was replicated thrice.The data on growth, flowering and yield parameters were recorded and statistically analysed. Growth and floral parameters in variety „Punjab Shingar‟ in terms ofnumber of branches (8.83), flower diameter (6.66 cm) and number of flowers/plant(147.45) were recorded to be the highest with treatment N@ 100kg/ha with plant spacing of 40×60 cm whereas, the highest plant spread (45.28 cm), least days to flower bud initiation (80.83 days) and chlorophyll content (58.83 spad value) was recorded best with treatment of N@ 120kg/ha and planting distance of 40×60 cm. In variety "Ratlam Selection‟, flower diameter (7.71 cm) and number of flowers/plant (123.81) recorded to be the maximum with N@ 100kg/ha with plant spacing of 40×60 cm whereas, plant spread (31.13 cm), branches/plant (7.80), least days for first bud appearance (82.91 days) was recorded highest with N@ 120kg/ha with planting spacing 40×60 cm. The interaction effect of varieties, nitrogen levels and plant spacing also differed significantly. The interaction effect with plant spread (38.20 cm), least days to first flower bud initiation (81.87 days) and highest chlorophyll content (62.57 spad value) was recorded with N@ 120 kg/ha and planting distance of 40×60 cm whereas, the branches/plant (8.13), flower diameter (7.18 cm) and flowers/plant (146.15) was recordedto be highest with the application of N@ 100 kg/ha with planting distance of 40×60 cm. Yield attributes such as flowers number of flowers per plant and weight of flowers per unit area (m2), were recorded to be the highest with treatment N@100kg/ha with plant spacing 40×30 cm. Based on the study, it can be concluded that fertigation level N@ 100kg/ha with planting distance of 40×30 cm was found to be the best combination for production of highest loose flower yield in chrysanthemum.