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Current Trends in Biotechnology and Pharmacy Vol. 5 (3) 1346 -1352 July 2011, ISSN 0973-8916 (Print), 2230-7303 (Online) 1349 Table 2. Effect of various fertilizer amendments on dry weight of root (g per plant) at different stages of growth in Coleus forskohlii Treatments Days after planting 30 90 150 T : Control – No manures 3.8 8.2 26.8 1 : 100% NPK recommended dose (N- 40 kg ha -1 ) 7.3 16.5 47.5 T 2 T 3 T 4 T 5 T 6 : 50% NPK + 10 tonnes of farm yard manure/ha 9.1 18.9 60 : 50% NPK + 5 tonnes of vermicompost/ha 6.2 16.7 55 : 20 tonnes of farm yard manure/ha 4.5 11.7 29.4 : Vermicompost 10 tonnes/ha 5.1 14.9 44 Nageswara Rao et al
Current Trends in Biotechnology and Pharmacy Vol. 5 (3) 1346 -1352 July 2011, ISSN 0973-8916 (Print), 2230-7303 (Online) 1350 Table 3. Fresh and weights of roots grown under different nitrogen regimes. N = Replicates, M = Mean, SE = Standard error 30 days 90 days 150 days Treatment N M-SE M+SE M-SE M+SE M-SE M+SE T1 Fresh weight of root 3 58 59.33 120 121.33 267 267.67 Dry weight of root 3 3.73 3.8 8.2 8.27 26.8 27.27 T2 Fresh weight of root 3 83 84.33 340 340.67 490 490.67 Dry weight of root 3 7.44 7.96 16.6 17.4 47.67 48.13 T3 Fresh weight of root 3 149 150.33 468 468.67 600 601.33 Dry weight of root 3 9.24 10.03 18.85 19.09 60 60.67 T4 Fresh weight of root 3 100 100.67 374.33 375 510 510.67 Dry weight of root 3 6.29 6.84 16.79 17.08 55 55.67 T5 Fresh weight of root 3 69 69.67 160 160.67 309.33 310 Dry weight of root 3 4.59 5.01 11.79 12.14 29.49 29.97 T6 Fresh weight of root 3 73 73.67 190 190.67 385 385.67 Dry weight of root 3 5.1 5.23 14.85 15.09 44 44.67 T1 = control; T2 = 100% NPK; T3 = 50% NPK + 10 tonnes of farm yard manure; T4 = 50% NPK + 5 tonnes of vermicompost; T5 = 20 tonnes of farm yard manure; T6 = 10 tonnes of vermicompost. 100 kg ha -1 P2O5 and 20 tonnes FYM ha -1 increased the fresh weight of rhizomes in Acorus calamus (7). Sheu et al. (12) also observed higher yield (23 tonnes ha -1 ) in Dioscorea doryophora with organic and inorganic fertilizer amendments. In treatment number 3, maximum fresh weights were recorded (Table 3 and Fig. 4.). In Aswagandha (Withania somnifera), dry weight of roots (1.297 g plant -1 ) were obtained with 15 kg N ha -1 (Maryada et al., 2001). In Catharanthus roseus, 100 kg N, 40 kg P 2 O 5 and 50 kg K 2 O) ha -1 gave maximum root yields (Hegde, 1988). Highest root yield of aswagandha was obtained with the application of 20 kg N and 40 kg P 2 O 5 ha -1 (11). In aswagandha, application of 40 kg N ha -1 and 60 kg P 2 O 5 ha -1 and 20 kg K 2 O ha -1 gave the highest dry root yields of 770.37 kg ha -1 (13). Root characters like number of roots per plant and length of roots increased in Chlorophytum borivallianum, along with the number of tubers, fresh and dry weights of tuber yield and steroidal content with the application of vermicompost of 5 tonnes ha -1 . The steroidal content was the highest with vermicompost application (2). Maheshwari et al. (1988) also observed increase in the root yield in Rauwolfia serpentaina with the application of N (30 kg N ha -1 ). Application of NPK at 30:30:0 kg ha -1 recorded the highest dry root yields of Aswagandha but further increasing the levels of Effect of NPK and farm yard manure on the accumulation of forskolin
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Page 175: (December 7-9, 2011) Venue: Karunya
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