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[1]ZHANG Yan-qing,LIU Wen-zhao.Characteristics of Water Utilization Process and Efficiency under Different Fertilization Treatments in a Wheat Field[J].Research of Soil and Water Conservation,2012,19(05):133-138.

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Characteristics of Water Utilization Process and Efficiency under Different Fertilization Treatments in a Wheat Field

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 05 Page number: 133-138 Column: Public date: 2012-10-20

Title:: Characteristics of Water Utilization Process and Efficiency under Different Fertilization Treatments in a Wheat Field

Author(s):: ZHANG Yan-qing¹, LIU Wen-zhao²; 1. College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: Loess Tableland; long-term fertilization experiment; precipitation use efficiency; water use efficiency; yield; winter wheat

CLC:: S512.1

DOI:: -

Abstract:: Characteristics of water utilization process and efficiency under different fertilization treatments were studied through a field experiment conducted from 2010 to 2011. Results showed that under the condition of 90 kg/hm² P application, the ratio of cropland water consumption to total supplied water(ET/SW) and the ratio of total transpiration to cropland water consumption(T/ET) gradually increased with the increased rate of N application if the rate of N application was between 0 and 135 kg/hm², but crop water use efficiency with transpiration considered only(the ratio of grain yield to total transpiration, Y/T) and precipitation use efficiency(PUE) reached the highest value when the rate of N application was 180 kg/hm². Under the rate of 90 kg/hm² N application, the ET/SW was almost the same as the T/ET if the rate of P application was between 90 and 180 kg/hm², but significantly higher than single N application treatment. The Y/T was gradually increased with the increased P application under the same N application. However, PUE reached the highest value when P application was 90 kg/hm². In contrast to no fertilizer application, the combined application of 90 kg/hm² P and 180 kg/hm² N in the winter field, from jointing stage to maturity of winter wheat, increased the amount of cropland water consumption by 23.5%, the amount of transpiration by 186.8%, the ET/SW by 10.5%, the T/ET by 200%, the water use efficiency(Y/ET) up to 11.13 kg/(hm²·mm), and PUE up to 18.73 kg/(hm²·mm).

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