Nitrate leaching of winter wheat grown in lysimeters as affected by fertilizers and irrigation on the North China Plain

GU Li-min; LIU Tie-ning; ZHAO Jun; DONG Shu-ting; LIU Peng; ZHANG Ji-wang; ZHAO Bin

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Nitrate leaching of winter wheat grown in lysimeters as affected by fertilizers and irrigation on the North China Plain

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Proper application of nitrogen (N) fertilizers and irrigation management are important production practices that can reduce nitrate leaching into groundwater and improve the N use efifciency (NUE). A lysimeter/rain shelter facility was used to study effects of the rate of N fertilization, type of N fertilizer, and irrigation level on key aspects of winter wheat production over three growing seasons (response variables were nitrate transport, N leaching, and NUE). Results indicated that nitrate concentration in the soil proifle and N leaching increased with the rate of N fertilization. At the end of the third season, nitrate concentration in the top 0–75 cm layer of soil was higher with manure treatment while urea treatments resulted in higher concentrations in the 100–200 cm layer. With normal irrigation, 3.4 to 15.3%of N from applied fertilizer was leached from the soil, yet no leaching occurred under a stress irrigation treatment. The manure treatment experienced less N leaching than the urea treatment in al cases except for the 180 kg N ha-1 rate in 2011–2012 (season 3). In terms of grain yield (GY), dry matter (DM) or NUE parameters, values for the manure treatment were lower than for the urea treatment in 2009–2010 (season 1), yet were otherwise higher for urea treatment in season 3. GY and crop nitrogen uptake (NU) were elevated when the rate of N fertilizer increased, while the NUE decreased;GY, DM, and NU increased with the amount of irrigation. Data indicated that reduced rates of N fertilization combined with increased manure application and proper irrigation management can lower nitrate levels in the subsoil and reduce potential N leaching into groundwater.

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《农业科学学报（英文版）》 |2015年第2期|374-388|共15页
作者
GU Li-min; LIU Tie-ning; ZHAO Jun; DONG Shu-ting; LIU Peng; ZHANG Ji-wang; ZHAO Bin;
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State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

State Key Laboratory of Crop Biology, Col ege of Agronomy/National Engineering Laboratory for Efifcient Utilization of Soil and Fertilizer Resources, Shandong Agriculture University, Tai’an 271018, P.R.China;

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Nitrate leaching of winter wheat grown in lysimeters as affected by fertilizers and irrigation on the North China Plain

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