Crop-ecology and nutritional variability influence growth and secondary metabolites of Stevia rebaudiana Bertoni

Pal, Probir Kumar; Kumar, Rajender; Guleria, Vipan; Mahajan, Mitali; Prasad, Ramdeen; Pathania, Vijaylata; Gill, Baljinder Singh; Singh, Devinder; Chand, Gopi; Singh, Bikram; Singh, Rakesh Deosharan; Ahuja, Paramvir Singh

doi:10.1186/s12870-015-0457-x

Table 3 Effect of different levels N, P and K on yield (t ha ⁻¹ ) and harvest index (HI) of stevia under different experimental locations

From: Crop-ecology and nutritional variability influence growth and secondary metabolites of Stevia rebaudiana Bertoni

Treatment	Dry leaf yield (t ha ⁻¹ )						Dry stem yield (t ha ⁻¹ )						Harvest Index (HI)
	CSIR-IHBT		RHRS		PAU		CSIR-IHBT		RHRS		PAU		CSIR-IHBT		RHRS		PAU
	2010	2011	2010	2011	2010	2011	2010	2011	2010	2011	2010	2011	2010	2011	2010	2011	2010	2011
Nitrogen Level
N ₃₀	1.24	1.34	0.79	0.91	0.39	0.6	1.83	1.99	1.42	1.43	0.78	1.19	0.41	0.42	0.36	0.39	0.34	0.33
N ₆₀	1.56	1.69	0.93	1.04	0.52	0.81	2.19	2.48	1.47	1.56	0.76	1.47	0.42	0.41	0.39	0.4	0.4	0.35
N ₉₀	1.69	1.91	1.03	1.19	0.53	0.83	2.35	2.65	1.56	1.69	0.74	1.53	0.42	0.42	0.39	0.41	0.41	0.35
SEm(±)	0.04	0.03	0.03	0.02	0.02	0.04	0.04	0.05	0.03	0.03	0.03	0.08	0.007	0.004	0.009	0.007	0.007	0.011
CD(P = 0.05)	0.10	0.09	0.08	0.06	0.05	0.13	0.12	0.14	0.08	0.08	NS	0.22	NS	NS	0.025	NS	0.021	NS
Phosphorus Level
P ₂₀	1.44	1.55	0.87	1.01	0.47	0.68	1.94	2.22	1.48	1.55	0.73	1.35	0.42	0.41	0.37	0.39	0.39	0.34
P ₄₀	1.55	1.74	0.98	1.08	0.48	0.8	2.3	2.52	1.49	1.56	0.79	1.45	0.4	0.41	0.39	0.41	0.38	0.35
SEm (±)	0.03	0.03	0.02	0.02	0.01	0.04	0.03	0.04	0.02	0.02	0.03	0.06	0.006	0.003	0.007	0.006	0.006	0.009
CD(P = 0.05)	0.08	0.07	0.06	0.05	NS	0.11	0.10	0.12	NS	NS	NS	NS	0.016	NS	0.020	0.016	NS	NS
Potassium Level
K ₂₀	1.38	1.51	0.84	0.99	0.47	0.74	1.91	2.20	1.49	1.53	0.75	1.31	0.41	0.41	0.37	0.39	0.38	0.36
K ₄₀	1.62	1.74	0.98	1.08	0.49	0.76	2.11	2.44	1.52	1.59	0.77	1.48	0.43	0.42	0.39	0.4	0.38	0.34
K ₆₀	1.50	1.69	0.95	1.07	0.49	0.73	2.34	2.48	1.54	1.56	0.76	1.41	0.39	0.41	0.38	0.4	0.39	0.34
SEm (±)	0.04	0.03	0.03	0.02	0.02	0.04	0.04	0.05	0.03	0.03	0.03	0.08	0.007	0.004	0.009	0.007	0.007	0.011
CD(P = 0.05)	0.10	0.09	0.08	0.06	NS	NS	0.12	0.14	0.08	NS	NS	NS	0.02	NS	NS	NS	NS	NS
Interaction effect
CD of N × P	NS	NS	NS	NS	NS	NS	0.16	0.20	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
CD of N × K	0.18	0.16	NS	NS	NS	NS	0.20	NS	NS	NS	NS	NS	0.04	NS	NS	NS	NS	NS
CD of P × K	NS	NS	NS	NS	NS	NS	0.16	NS	NS	NS	NS	NS	0.03	NS	NS	NS	NS	NS
CD of N × P × K	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS

N₁, N₂ and N₃ are the level of nitrogen @ 30, 60 and 90 kg ha⁻¹, respectively. P₁ and P₂ are the level of phosphorus (P₂O₅) @ 20 and 40 kg ha⁻¹, respectively, while K₁, K₂ and K₃ are representing the level of potassium (K₂O) @ 20, 40 and 60 kg ha⁻¹, respectively.

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ISSN: 1471-2229

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