J Sci Food Agric 2021 May 10. Epub 2021 May 10.
Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, 150081.
Background: Soil- and plant-produced extracellular enzymes drive nutrient cycling in soils and are thought to be regulated supply and demand for carbon (C) and nutrients within the soil. Thus, agriculture management decisions that alter the balance of plant and supplemental nutrients should directly alter extracellular enzyme activities (EEAs), and EEA stoichiometry in predictable ways. We used a 12-year experiment varying three major continuous grain crops (wheat, soybean, and maize) each crossed with mineral fertilizer (WCF, SCF, and MCF, respectively) or not fertilized (WC, SC, and MC, respectively, as controls). Read More