Different Rates of Chicken Manure and NPK 15-15-15 Enhanced Performance of Sunflower (Helianthus annuus L.) on Ferruginous Soil

Table 3

Effect of different rates of chicken manure and NPK fertilizers on the leaf area (cm²) of sunflowers.

Treatments	Main cropping				Residual
	Weeks after sowing				Weeks after sowing
	4	6	8	10	4	6	8	10
Control	29.6^ab ± 0.67	66.71^f ± 0.59	96.3^g ± 1.18	117.5^b ± 0.78	29.6^ab ± 8.99	49.8^c ± 3.32	140.0^c ± 7.8	231.0^e ± 7.74
PM1	32.9.0^ab ± 0.60	115.6^b ± 0.83	166.4^a ± 0.68	173.2^ab ± 2.06	31.9.0^ab ± 8.22	43.0^c ± 0.79	152.9^c ± 16.1	244.4^e ± 7.98
PM2	67.9^a ± 0.55	108.7^c ± 0.21	163.3^b ± 0.50	180.1^a ± 0.05	68.9^a ± 18.68	84.3^b ± 0.86	200.7^bc ± 39.1	252.9^cd ± 21.9
PM3	49.9^ab ± 1.46	81.33^e ± 1.99	102.2^f ± 0.89	130.8^ab ± 0.83	49.9^ab ± 2.90	61.1^c ± 1.21	237.5^a ± 47.0	466.4^ab ± 62.5
PM4	42.7^ab ± 0.16	101.1^d ± 0.68	152.1^d ± 0.38	179.9^a ± 0.74	42.7^ab ± 8.82	74.4^b ± 7.75	233.2^ab ± 14.2	715.1^a ± 18.6
NPK1	25.2^b ± 1.55	58.4^g ± 0.44	90.4 ± 1.31	115.9^b ± 0.30	26.2^b ± 12.48	57.4^b ± 4.16	212.9^bc ± 12.2	290.9^d ± 6.68
NPK2	65.6^a ± 0.40	130.7^a ± 2.30	154.3^cd ± 0.21	190.2^a ± 0.98	65.6^a ± 21.19	80.5^a ± 10.8	220.7^abc ± 10.6	402.5^bc ± 46.3
NPK3	24.7^c ± 0.61	81.53^e ± 0.20	115.5^e ± 0.98	134.1^ab ± 0.07	38.8^c ± 4.11	79.4^b ± 7.01	220.5^abc ± 34.7	715.2^a ± 3.46

PM1 = chicken manure 5 t·ha⁻¹; PM2 = chicken manure 10 t·ha⁻¹; PM3 = chicken manure 15 t·ha⁻¹; PM4 = chicken manure 5 t·ha⁻¹; NPK1 = NPK 30 kg·N·t·ha⁻¹; NPK2 = NPK 60 kg·N·t·ha⁻¹; NPK3 = NPK 90 kg·N·t·ha⁻¹. Means ± standard deviations with the same letter on the same column are not significantly different at using DMRT.