Seasonal Dynamics of Soil Enzymatic Activity under Different Land-Use Types in Rocky Mountainous Region of North China

To reveal the effects of different land-use types on soil enzyme activities, samples were collected from 0–10, 10–20 and 20–30 cm layers to compare analyze β-glucosidase (BG), urease (URE), protease (PROT) catalase (CAT) activities in farmland (FL), abandoned land (AL) three plantation forests: Platycladus orientalis (L.) Franco (PO), Robinia pseudoacacia L. (RP) Quercus variabilis Bl. (QV) rocky mountainous region North China. The results showed that varied significantly under types, interannual mean values FL PO remarkably higher than those other uses 0–30 layer, which BG URE 22% 12% AL, 428% 179% QV, respectively; PROT CAT 66% 23% 479% 113% respectively. Soil BG, all June lower December, while activity was slightly June. enzymatic a notable decrease with depth layer. URE, (p < 0.01) or 0.05) positively correlated available nitrogen, phosphorus, potassium, dissolved organic carbon (DOC), NO3−-N, carbon, water content, clay silt volume fraction, negatively sand fraction. DOC pH important factors influencing activity, implying changes may be result combination temperature, moisture plant type. In conclusion, plantations are conducive improving physicochemical biological properties enhance fertility, is reasonable method achieve sustainable development