2026-10-14T11:24:03Z https://www.scidb.cn/oai

10.57760/sciencedb.cjae.00275 2026-08-04T10:57:05Z

2026-08-04 Soil nitrogen transformation rates in 0–20 cm layer under soil film mulching doi:10.57760/sciencedb.cjae.00275 en This dataset contains soil nitrogen transformation rates in the 0–20 cm soil layer under different soil film mulching treatments in a dryland maize field. The experiment was conducted at the Shouyang Dryland Farming Experimental Station, Shanxi Province, China, based on a three-year field trial. Two modified cellulose materials—carboxymethyl cellulose ammonium (CMC-NH₄, with nitrogen supply and adsorption functions) and carboxymethyl cellulose sodium (CMC-Na, with adsorption function only)—were applied via spraying (S, forming a continuous film with warming effect) and row application (R, without film formation and no warming effect), with water spray as the control (CK). Measured parameters include net nitrogen mineralization rate, net nitrification rate, net ammonification rate, denitrification potential, and nitrogenase activity (acetylene reduction assay, ARA). This dataset can be used to assess the effects of soil film mulching on soil nitrogen cycling and to disentangle the independent and interactive effects of warming, adsorption, and nitrogen supply functions. soil film mulching; nitrogen transformation; net mineralization; nitrification; denitrification; nitrogenase activity; dryland maize han yu Yang Shiqi RESTRICTED dataset Science Data Bank