tailieunhanh - Study on vertical and lateral leaching of nitrate from a wheat field in China

Based on these results, it was suggested that the nitrate vertical leaching had a greater pollution potential to water body than the lateral leaching during the wheat growth period in the fields. | Turk J Agric For 30 (2006) 59-65 © TÜB‹TAK Study on Vertical and Lateral Leaching of Nitrate from a Wheat Field in China Md. Toufiq IQBAL Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205 - BANGLADESH Received: Abstract: Vertical and lateral leaching of nitrate from a wheat field was studied through one season in a field in China by applying increasing amount of N fertilizers (. 90, 180, 270 and 360 kg ha-1). Results showed that nitrate leaching was the dominating way of nitrate loss from wheat land during the first two month after sowing seeds. After irrigation, the nitrate concentration in the leachate of 30 cm soil layer was higher than that of 60 cm, while the concentration of nitrate leaching at the five N treatments through the two depth soil layer came into the same level with the value of mg l-1 to mg l-1 for 30 cm soil layer and mg l-1 to mg l-1 for 60 cm soil layer, respectively. As the plot scale (20 m2) concerned, the amount of nitrate loss varied from mg l-1 to mg l-1 for 30 cm and from mg l-1 to mg l-1 for 60 cm. Peak nitrate concentration was mg l-1 during the third rainfall event. However, nitrate losing by lateral leaching in subsoil was less than that by vertical leaching. At the position that has m distances from one side of each plot, the highest nitrate concentrations in lateral leachate among the plots was mg l-1 and only has mg l-1 the highest lose amount value. By comparison of nitrate concentration in two position of m and m from one side of each plot, it was not easy for nitrate that transported by lateral leaching from wheat land, in that, nitrate horizontal movement potential in shallow subsoil could be negative. Based on these results, it was suggested that the nitrate vertical leaching had a greater pollution potential to water body than the lateral leaching during the wheat growth period in the .

• Nông nghiệp
• Wheat field
• Lateral leaching of nitrate
• Vertical leaching
• Horizontal movement potential
• Nitrate vertical leaching
• Wheat preservation using electric field
• Electric field
• Wheat preservation
• Avoid fungal growth
• High voltage electric field
• Field resistance of wheat
• Leaf rust
• Slow rusting
• Wheat Triticum aestivum L
• Related yield
• Wheat growing areas of Turkey
• Triticum aestivum
• New insecticides
• Termites on wheat
• Field conditions
• Comparison to yield
• Wheat in comparison
• Winter wheat
• Alopecurus myosuroides Huds
• Wheat cultivars Bezostaja
• Recent agricultural policy
• Wheat straw
• Corn straw
• Tobacco waste
• Organic residues
• Acetylene inhibition technique
• Energy utilization
• Nutrients removal
• Wheat weed ecosystem
• Dry matter accumulated
• Farmer field village
• Rice straw
• Enriched compost
• Easy compost
• Nutrient composition
• Agricultural science
• Doubled haploid wheat lines
• Anther culture technique
• Triticum aestivum L
• Doubled haploids
• Field evaluation
• Game theory
• Risk programming
• Field crops
• Agriculture and risk
• Namely wheat
• Remote sensing
• Spectral indices
• Multispectral radiometry
• Hyperspectral spectrometry
• Greenbug Schizaphis graminum Rondani
• Reaper binder
• Field efficiency
• Harvesting losses
• Different methods of harvesting
• Comparative performance of different methods
• Plant Biology
• Laboratory conditions
• Phytohormone crosstalk
• Grain yield
• Yield related traits
• Gene family members
• Certain clodinafop propargyl formulations
• Controlling annual grassy weed
• Herbicide formulations
• Field during both seasons
• BMC Genetics
• Quantitative pathogenicity
• Fusarium head blight
• Association mapping
• Candidate genes