DOI: 10.3724/SP.J.1145.2013.00399

Chinese Journal of Appplied Environmental Biology (应用与环境生物学报) 2013/19:3 PP.399-403

Effects of Different Water and Nitrogen Control Schemes on Yield of Winter Wheat and Soil Enzyme Activity in Dryland

A two-year field experiment located in rain-fed growing areas in Xiangfen County, Shanxi Province, was conducted to study the effects of different water and nitrogen control schemes on the yield formation of winter wheat and soil enzyme activity during the growth period in dryland. The aim of this project was to provide a scientific basis for high yield of rain-fed wheat and efficient management of water and fertilizer in China. The results showed that the urease activity had the tendency of ascending first and descending later with the progress of growth period since revival stage, with the maximum in the jointing stage in dryland. The catalase and alkaline phosphatase activity gradually increased from revival stage to maturity stage, with the maximum occurring in the grain filling stage or maturity. The activity of all the three soil enzymes of the N treatments were significantly higher than that of the control treatment without N application. In a certain N range (0-195 kg/hm2), the soil urease activity was higher with higher N level and more times of N application. The catalase and alkaline phosphatase activity for different amount of nitrogen were not significantly different. The activity of the three soil enzymes was significantly increased by ridge filming-furrow sowing cultivation in dryland, which also improved the maximum tillering number and spike number, with the yield 13% higher than that of the same N application treatment. Therefore, ridge filming-furrow sowing cultivation was an important scheme to improve the yield of dryland winter wheat. Fig 3, Tab 3, Ref 22

Key words:water and nitrogen control schemes,winter wheat in dryland,yield,soil enzyme activity,ridge filming-furrow sowing cultivation

ReleaseDate:2014-07-21 17:00:14

Funds:Supported by the Special Fund for National Wheat Modern Industrial Technology System Construction of China, the Special Fund for Agricultural Science Research in the Public Interest of China (No. 201303104), the Sci-tech Innovation Fund of Shanxi Agricultural University (No. 201231)