Chemical and Biological Technologies in Agriculture

Table 2 Spearman correlation between enzyme activity and nutrients content

From: Effects of continuous cropping of Pinellia ternata (Thunb.) Breit. on soil physicochemical properties, enzyme activities, microbial communities and functional genes

Spearman (r)	Organic C	Total N	Total P	Total K	Available P	Available K	Available N
Ure	− 0.600	− 0.400	0.600	− 0.500	− 0.600	− 0.205	− 0.289
CAT	− 0.949	− 0.632	0.812*	− 0.986**	− 0.872	− 0.632	− 0.845*
PPO	− 0.400	− 1.000**	0.657	− 0.657	− 0.700	− 0.928**	− 0.926**
Suc	− 0.400	− 0.400	0.829*	− 0.657	− 0.700	− 0.841*	− 0.741

Ure urease, CAT catalase, PPO polyphenol oxidase, Suc sucrose
|r| ≥ 0.7: highly correlated; 0.4 ≤ |r| < 0.7: moderately correlated; 0.2 ≤ |r| < 0.4: weakly correlated; (“*”, p < 0.05; “**” p < 0.01)

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