Table 3. The activity of dehydrogenases (DEH), catalase (CAT) and peroxidases (PER) in soil.

Sowing density (seeds m −2 ) [B]	OPS			CPS
	Spring wheat species [A]
	T. sphaerococcum	T. persicum	mean	T. sphaerococcum	T. persicum	mean
	DEH (mg TPF kg −1 24h −1 )
400 500 600	0.476 ± 0.007 0.482 ± 0.008 0.497 ± 0.007	0.426 ± 0.007 0.470 ± 0.003 0.489 ± 0.006	0.451 ± 0.035 0.476 ± 0.008 0.493 ± 0.006	0.625 ± 0.009 0.651 ± 0.010 0.684 ± 0.008	0.621 ± 0.011 0.640 ± 0.001 0.650 ± 0.004	0.623 ± 0.003 0.646 ± 0.008 0.667 ± 0.024
mean	0.485 ± 0.009	0.462 ± 0.026	0.473 ± 0.017	0.653 ± 0.030	0.637 ± 0.015	0.645 ± 0.019
	LSD0.05A – 0.021; B – 0.004; A/B – 0.019; B/A − 0.006			LSD0.05A – ns*; B – 0.013; A/B − 0.049 ; B/A − 0.019
	CAT (mg H 2 O 2 kg −1 h −1 )
400 500 600	0.458 ± 0.009 0.480 ± 0.013 0.519 ± 0.004	0.446 ± 0.005 0.459 ± 0.013 0.515 ± 0.008	0.452 ± 0.008 0.470 ± 0.015 0.517 ± 0.003	0.807 ± 0.008 0.834 ± 0.006 0.879 ± 0.011	0.792 ± 0.004 0.804 ± 0.004 0.830 ± 0.006	0.800 ± 0.011 0.819 ± 0.021 0.854 ± 0.035
mean	0.485 ± 0.031	0.473 ± 0.037	0.479 ± 0.034	0.840 ± 0.036	0.809 ± 0.019	0.824 ± 0.027
	LSD0.05A – ns; B – 0.025; A/B –ns; B/A – ns			LSD0.05A – 0.021; B – 0.023; A/B –ns; B/A – ns
	PER (mM PPG kg −1 h −1 )
400 500 600	1.102 ± 0.009 1.244 ± 0.046 1.411 ± 0.023	0.965 ± 0.018 1.182 ± 0.014 1.283 ± 0.035	1.033 ± 0.097 1.213 ± 0.044 1.347 ± 0.091	1.452 ± 0.006 1.543 ± 0.020 1.603 ± 0.008	1.379 ± 0.011 1.432 ± 0.009 1.519 ± 0.011	1.415 ± 0.052 1.487 ± 0.078 1.561 ± 0.059
mean	1.252 ± 0.155	1.143 ± 0.162	1.198 ± 0.158	1.533 ± 0.076	1.443 ± 0.071	1.488 ± 0.073
	LSD0.05A – 0.049; B – 0.084; A/B –ns; B/A – ns			LSD0.05A – 0.036; B – 0.031; A/B –ns; B/A – ns

Notes.

^*ns - not significant.