Effects of paclobutrazol on the yield, quality, and related enzyme activities of different quality type peanut cultivars. Differences in  seed kernel quality and related enzyme activities of different quality type peanut cultivars. Effects of nitrogen application period on the nitrogen metabolism key enzymes activities and antioxidant characteristics of high-yielding summer maize. Effects of nitrogen on photosynthetic characteristics and enzyme activity of nitrogen metabolism in maize under-mulch-drip irrigation Effects of density and nitrogen on relevant enzyme activity of nitrogen metabolism and nutritional quality of grain in triticale