Effects of Deep Tillage and Straw Returning on Soil Microorganism and Enzyme Activities

Table 3

DTCT and DTDNT values of urease, phosphatase, saccharase, and catalase activities in loam and clay soil.

		Urease		Phosphatase		Saccharase		Catalase
		Loam	Clay	Loam	Clay	Loam	Clay	Loam	Clay
DTCT	0–10 cm	0.031	0.135	0.051	0.182	−0.012	0.077	0.076	0.091
	10–20 cm	0.058	0.021	0.132	0.273	−0.131	0.047	0.197	0.127
	20–30 cm	0.070	0.045	0.144	0.159	0.321	0.030	0.305	0.079
	30–40 cm	0.062	0.070	0.031	0.659	0.123	0.183	0.171	0.107
DTDNT	0–10 cm	0.137	0.169	0.524	0.274	0.087	0.175	0.066	0.070
	10–20 cm	0.124	0.099	0.622	0.533	0.119	0.122	0.145	0.056
	20–30 cm	0.148	0.136	0.472	0.388	0.488	0.144	0.188	0.076
	30–40 cm	0.188	0.164	0.405	−0.025	0.322	0.350	0.160	0.058

Bold numbers in the column represented the maximal value.