关键词: 新型尿素, 冬小麦, 养分吸收利用, 产量, 光合

Abstract: In order to reveal the application effect of new type urea in winter wheat planting, field experiment was conducted and 8 treatments including the application with common urea (Urea), controlled release urea (LCUrea), alginic acid urea (HUrea), density network urea (NUrea), Mn urea (MnUrea), single basal fertilization of controlled release urea(LCUrea1), common urea and equal amount of Mn to treatment MnUrea (Urea+Mn) and no nitrogen fertilizer (CK) were set up, the effects of different nitrate treatments on yield, leaf SPAD value, photosynthetic physiological characteristics, nitrogen absorption and utilization of winter wheat were investigated. Compared with common urea, the leaf SPAD values at jointing stage were increased by 1500% and 1300%, respectively, in LCUrea and HUrea treatments. At filling stage, the net photosynthetic rate of LCUrea and HUrea treatments were increased by 3304% and 2076% than that in Urea treatment, respectively; and their stomatal conductance were significantly increased by 2609% and 2174%, respectively; their nitrogen accumulation amount were increased by 1439% and 1236%, respectively; their nitrogen use efficiency were increased by 4575% and 3902%, respectively. The grain yield of LCUrea and HUrea treatments were increased than that of Urea treatment by 1449% and 1333%, respectively. However, there was no significant difference in grain yield between NUrea, Mnurea and Urea treatments. Additionally, treatments of LCUrea and HUrea could effectively increase the number of panicles, and improve the photosynthetic physiological characteristics, promote nitrogen uptake and utilization, increase yield and nitrogen use efficiency of winter wheat. Therefore, the application of controlled release urea and alginic acid urea could be widely used in tidal soil area of North Henan.

Key words: newtype urea, winter wheat, nutrient uptake and utilization, yield, photosynthetic