Effects of Nitrogen Application Rate on Water Consumption Characteristics and Grain Yield of Wheat
Wang Xin
Shi Yu
Yu Zhenwen
Abstract：In order to study the effects of nitrogen application rate on water consumption characteristics and yield of strong gluten wheat Jimai 20, four treatments, 0 (N0), 180 (N1), 210 kg/hm2(N2) and 240 kg/hm2 (N3), were designed under field conditions in wheat growing season of 2012-2013 and 2013-2014.The re-sults showed that with the increase of nitrogen application rate from 0 to 240 kg/hm2 , the soil relative water con-tent before irrigation at jointing stage was significantly decreased, the irrigation amount at jointing stage was sig-nificantly increased and total irrigation amount also showed an upward tendency.Total water consumption of N2 treatment was significantly higher than those of N0 and N1 treatment, and had no significant difference with that of N3 treatment.N2 treatment also had higher soil water consumption and higher ratio to total water consump-tion.The soil water consumption of N2 treatment in 140~200 cm soil layer was higher than those of other treat-ments, which indicated that N2 was conducive to the use of water in deep soil layers.The grain yield and water use efficiency of N2 treatment were significantly higher than those of other treatments, thus N2 treatment was the optimum nitrogen application rate.
Keywords：Nitrogen application rateWheatSoil water consumptionWater use efficiencyGrain yield
Publication Date：2015-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 51-54,60 )