Effect of Fertilizer Amount on Dynamic Change Characteristic of Soil Nitrogen under Film Hole Irrigation
Abstract：Though the different urea amount experiment made under film hole irrigation in the testing-hole,the soil nitric nitrogen amount of maize field under different growth period was determined in order to study the dynamical change of soil nitric nitrogen and evaluate the environment effect of soil nitric nitrogen.The result showed： the nitric nitrogen amount on the profile is little as the distance from film hole center is increase and large as the fertilizer amount increase;there is nitric nitrogen accumulation peak on the profiles being 3 cm and 8 cm away from film hole center under different fertilizer.To increase fertilizer postponed the max nitric nitrogen absorption period.The corn yield and nitric nitrogen accumulation amount is large with fertilizer increasing and there is logarithm function relationship between nitric nitrogen accumulation amount and fertilizer amount;shooting stage and heading stage is the dangerous period of nitrogen leaching because the nitrogen amount is large in the lower soil.The result provided the proof for reasonable fertilizer and evaluating effect of nitrogen on environment.
Keywords：fertilizer amountfilm hole irrigationsoil nitrogendynamical change
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 38-42 )