Studies on nitrogen application in combination with phosphorus or potassium on gladiolus cv. Jester Gold
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Gladiolus, nitrogen, phosphorus, potassium, corm.Issue
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Abstract
An experiment was carried out to study the effects of nitrogen (20, 40, 60, 80 g/m2) with phosphorus (5, 10, 20 g/m2) and potassium (15, 20, 25 g/m2) and one control without fertilization application on vegetative growth, corm production, nitrogen uptake, phosphorus and potassium content on gladiolus cv. Jester Gold in RBD at IARI, New Delhi for two growing seasons. In all, there were 25 treatments. Application of N80P20 g/m2 produced significantly maximum leaves/shoots (7.93), leaf area/plant (443.69 cm2), corm size (5.14 cm), weight of corm (45.06 g) and cormel (5.65 g) per mother corm, cormels/plant (42.06), and propagation coefficient (507.12%). Maximum nitrogen uptake at spike emergence (77.03 kg/ha) and at harvest (159.62 kg/ha), phosphorus content at spike emergence (0.38%) and at harvest (0.55%) was noted under N80P20 g/m2. Higher dose of N80P25 g/m2 noted maximum potassium content at spike emergence (4.38%) and at harvest (4.53%). However, earliest 50% heading was recorded under N20P5 g/m2.
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