Multimicronutrient Slow-Release Fertilizer of Zinc, Iron, Manganese, and Copper

Table 2

Field trial using slow-release fertilizers on rice and potatoes: yields, nutrient uptake, and vitamin C.

Treatments	Rice at Baruipur (new alluvium); [Variety:𝐽𝑎𝑦𝑎]					Rice at Nalikul (old alluvium); [Variety:𝑁𝑖𝑟𝑎𝑛𝑗𝑎𝑛]					Potato at Nalikul (old alluvium); [Variety:𝐽𝑦𝑜𝑡𝑖]
	Yield (kg/ha)	Total uptake (g/ha)				Yield (kg/ha)	Total uptake (g/ha)				Yield (kg/ha)	Total uptake (g/ha)				Vitamin C (mg/100 g)
		Zn	Fe	Mn	Cu		Zn	Fe	Mn	Cu		Zn	Fe	Mn	Cu
C	3242	70.6	246	140	21	3698	76	492	206	41	9900	217	764	69	91	6.21
S1	3076	70.6	350	158	22	3724	80	499	216	42	10700	239	948	107	97	4.53
S2	3596	75.6	303	162	26	3961	78	593	236	47	9500	216	915	93	97	5.33
S3	3748	85.7	341	179	23	3831	87	577	229	44	11000	277	756	85	103	5.94
P1	4647^b,d	105.1^b,d	472^a,c	236^b,d	33	4056	117^b,d	597	332^b,d	70	14075^a	432^a,c	1966^a	151^a	163	8.44^a,d
P2	4998^b,d	120.8^b,d	615^b,d	288^b,d	33	4397^b,c	122^b,d	876^b,c	351^b,d	76	12550	396	1756	140	148	6.31
P3	4383^b	110.6^b,c	492^a	229^b	34	4462^b,d	114^b,c	693	291^b,c	48	16025^b,d	560^b,d	2569^b,d	225^b,d	198^a,c	8.11^c
CD (5%)	758.3	22.4	215	559		373.2	208	241.6	596		3460.0	83.9	479.5	33.3	33.1	2.07
CD (1%)	1021.2	29.8	286.5	74.4		502.6	281	325.3	80.2		4687.5	113	645.6	44.9	44.6	2.81

C: Control; S₁–S₃: sulfates of Zn, Fe, Mn, and Cu; P₁–P₃: slow-release micronutrients; S₁ and P₁: 1 kg/ha Zn + 0.33 kg/ha Fe + 0.165 kg/ha Mn + 0.083 kg/ha Cu; S₂ and P₂: 2 kg/ha Zn + 0.66 kg/ha Fe + 0.33 kg/ha Mn + 0.165 kg/ha Cu; S₃ and P₃: 4 kg/ha Zn + 1.33 kg/ha Fe + 0.66 kg/ha Mn + 0.33 kg/ha Cu. ^aSignificant with respect to control at 5% level. ^bSignificant with respect to control at 1% level. ^cSignificant with respect to the corresponding water-soluble treatment at 5% level. ^dSignificant with respect to the corresponding water-soluble treatment at 1% level.