Effect of fertigation in production of standard and spray chrysanthemum under polyhouse condition

A field study was conducted during 2005–06 at the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat with a view to evaluate suitable fertigation levels in production of Standard and Spray chrysanthemum under polyhouse and in open condition. The treatments included Fertigation 100% (T₁), Fertigation 75% (T₂), Fertigation 50% (T₃) and Conventional method (T₄). The results revealed that in case of standard chrysanthemum, significantly higher plant height (53.33 cm), early flowering (81.66 days), maximum blooming period (39.66 days), maximum vase life (25.30 days), highest yield/100m² (198.36 g) and maximum fertigation efficiency (52.95) was recorded under 75% fertigation (T₂). Similarly, in case of spray chrysanthemum, the highest plant height (60.30 cm), maximum number of leaves (108.66), maximum diameter of flower (7.00cm), maximum vase life (26.33 days), highest fresh weight (2.02g), dry weight (0.34g) and highest yield/100m² (87.86 kg) was recorded in 75% fertigation (T₂) which was significantly differed over conventional method.