Table 2 Mean square value (ANOVA) of biochar and salinity stress on photosynthetic pigment and enzymatic antioxidants of pea varieties under salinity stress.

Varieties	Salinity stress	Biochar	Chlorophyll a	Chlorophyll b	Total chlorophyll	Carotenoids	CAT	SOD	POD
V1 (Meteor)	Control	Control	0.47 ± 0.02defg	1.06 ± 0.03def	1.54 ± 0.49de	1.19 ± 0.02def	0.08 ± 0.005 g	944 ± 74.9f.	1175 ± 42.1hi
		BC (55 g)	0.58 ± 0.02bcd	1.29 ± 0.01bc	1.87 ± 0.02bc	1.41 ± 0.03bcd	0.12 ± 0.008 fg	1386 ± 37.3de	1657 ± 73.6 fg
		BC (110 g)	0.68 ± 0.02ab	1.45 ± 0.02ab	2.13 ± 0.02a	1.60 ± 0.51ab	0.16 ± 0.01ef	1575 ± 33.4 cd	2021 ± 92.9def
	Salinity	Control	0.39 ± 0.01 g	0.77 ± 0.03 g	1.17 ± 0.05f.	0.75 ± 0.04i	0.25 ± 0.007c	1596 ± 67.4 cd	1919 ± 115ef
		BC (55 g)	0.45 ± 0.01efg	0.97 ± 0.02f.	1.42 ± 0.01e	0.96 ± 0.04ghi	0.27 ± 0.006bc	1895 ± 90.3abc	2386 ± 66.7 cd
V2 (Green Grass)		BC (110 g)	0.52 ± 0.01de	1.22 ± 0.02 cd	1.75 ± 0.01 cd	1.07 ± 0.03 fg	0.30 ± 0.009ab	2190 ± 62.3ab	2852 ± 88.2ab
	Control	Control	0.55 ± 0.01cde	1.18 ± 0.03cde	1.73 ± 0.04 cd	1.33 ± 0.04cde	0.14 ± 0.004f.	1089 ± 87.7ef	1012 ± 64.1i
		BC (55 g)	0.66 ± 0.02abc	1.42 ± 0.03ab	2.08 ± 0.007ab	1.49 ± 0.04abc	0.19 ± 0.007de	1405 ± 89.8de	1252 ± 66.7hi
		BC (110 g)	0.73 ± 0.02a	1.53 ± 0.04a	2.27 ± 0.06a	1.65 ± 0.04a	0.23 ± 0.01 cd	1684 ± 84.6 cd	1486 ± 88.2gh
	Salinity	Control	0.41 ± 0.02 fg	0.75 ± 0.04 g	1.16 ± 0.04f.	0.80 ± 0.06hi	0.27 ± 0.01bc	1826 ± 97.9bc	2253 ± 96.6de
		BC (55 g)	0.51 ± 0.01def	1.04 ± 0.03ef	1.55 ± 0.04de	1.01 ± 0.03fgh	0.31 ± 0.008ab	2070 ± 53.8ab	2667 ± 67.2bc
		BC (110 g)	0.57 ± 0.02bcd	1.14 ± 0.02cdef	1.72 ± 0.02 cd	1.13 ± 0.03efg	0.35 ± 0.01a	2231 ± 34.1a	3111 ± 102a

Values represent means ± standard error of three replicates. Same letter sharing means; a parameter indicate that they do not vary significantly based on Tuckey test α = 0.05. V1 = Meteor; V2 = Green Grass; Control = No salinity; Salinity = 80 mM Nacl; Control = No Biochar; BC (55 g) = Biochar 8 g/kg soil; BC (110 g) = Biochar 16 g/kg soil.

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