Response of Black Nightshade to Different Cropping Systems and the Effect on Physiological Parameters and Mineral Composition

Table 3

Variation in mineral composition of S. nigrum L. in the two cropping systems: open field and greenhouse.

Nutrient	Cropping systems		SEM	LSD (5%)	F probability
	Open field	Greenhouse
Macro minerals
Calcium (%)	1.183^a	1.017^ab	0.0145	0.0570	0.001
Phosphorus (%)	0.6143^a	0.5213^ab	0.01088	0.04270	0.004
Magnesium (%)	0.6940^a	0.4073^b	0.00475	0.01865	<.001
Potassium (%)	3.900^ab	4.570^a	0.1288	0.5056	0.021
Sodium (mg/kg)	350.3^ab	465.6^a	11.49	45.11	0.002
Sulphur (%)	0.634^b	1.503^a	0.0297	0.1166	<.001
Trace elements
Copper (mg/kg)	16.97^a	12.87^b	0.488	1.915	<.001
Manganese (mg/kg)	78.93^a	24.97^b	0.211	0.828	<.001
Iron (mg/kg)	882^a	139^b	32.9	129.2	<.001
Zinc (mg/kg)	59.90^a	37.27^b	1.314	5.160	<.001
Boron (mg/kg)	27.03^b	37.27^a	0.636	2.497	<.001
Aluminium (mg/kg)	672^a	68^b	21.2	83.4	<.001

Note: Means within columns followed by the same superscript were not significantly different (). SEM; LSD at 5% level.