Fertigation Effect on Carnation(Dianthus caryophylus L.) under Polyhouse
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Date
2013
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Rajendra Agricultural University, Pusa (Samastipur)
Abstract
In present study “Fertigation Effect on Carnation(Dianthus caryophylus L.) under Polyhouse, an attempt has been made to explore the feasibility of carnation cultivation under greenhouse condition. The experiment was laid under Split Plot Design (SPD) with twelve (12) treatments, i.e., 3 main treatments on variety, namely; V1: Loris; V2: Pingu & V3: Gioele, and 4 sub- treatments on fertigation, i. e, F1: 80 % fertigation of RDF of NPK; F2: 100% fertigation of NPK; F3: 120% fertigation of NPK and F4: 100% application of RDF, manually, i.e., control and three replications.
The average daily month wise water requirement per plant of Carnation was computed to the tune of 0.15 cm October, 2012; 0.17cm November; 0.12cm December; 0.12cm January; 0.20 February; .41cm March; 0.56cm April and 0.47cm May, 2013. The total water requirement during crop period was found to be 66.56cm.
Among different varietal treatments, the treatment V2 (Pingu) recorded maximum number of branches (9.80); minimum days for bud initiation (89.83 days)& flowering(164.83 days) ; maximum flower diameter (7.83cm) and stalk length (60.22cm) & girth (4.43mm) as well as maximum number of flowers per m2 area 281.
As for effect of fertigation treatment is concerned, the treatment F3 (120% fertigation of RDF of NPK) is found very effective, might be due to application of higher doses, resulting maximum plant heights 28.88, 28.83, 45.31, 62.20, 80.33, 85.21 and 87.18cm, respectively at 30,60,90,120,150,180 and 210 DATs. Also, the number of branches (11.59); minimum time for bud formation (87.89 days), minimum days to flowering (165.11 days), maximum stalk length (57.83cm) and girth (4.91mm) as well as maximum number of flower per m2 area (352.22). The b/c ratio was also found highest in fertigation treatment F3, i.e. 2.60, 2.56 and 2.59 for all the varieties ,i.e., V1, V2 and V3, respectively, whereas lowest 0.81, 0.96 and 0.85 was recorded in control treatment (F4) for Loris, Pingu and Gioele, respectively.
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