Abstract
The effects of six combinations of NPK fertigation (100N+20P+100K(T1),125N+30P+130K(T2),150N+40P+160K(T3),175N+50P+190K(T4),200N+60P+220K (T5) and 225N+70P+250K(T^) ppm) at 3 days interval on plant growth and flowering in two rose cultivars: Red Giant and Sunflare were investigated. Plant height, number of branches per plant, number of leaves per plant, flowering time, number of flowers per plant and number of petals per flower were maximum with fertigation at 175N+50P+190K ppm. All other combinations above this level of NPK produced more or less statistically similar results hence are not recommended as economical one. NPK fertigation combinations below 175N+50P+190K ppm level were statistically produced inferior plant growth characteristics hence not recommended as ideal ones.
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