influence of subsurface drain depth and spacing on nitrate losses from paddy fields during canola growth season
نویسندگان
چکیده
0
منابع مشابه
Modeling Impacts of Tile Drain Spacing and Depth on Nitrate-Nitrogen Losses
61 S in the Gulf of Mexico have documented a large area with seasonally depleted O2 levels (<2 mg L−1). Most aquatic species cannot survive at such low O2 levels. A reduction in NO3–N loading by 30% was initially recommended to reduce hypoxia in the Gulf of Mexico (Mitsch et al., 1999). Following a scientifi c reassessment that recommended a reduction of 45% (USEPA, 2007), the USEPA developed a...
متن کاملQuantifying hydrological effects of crop diversification in Northern Iran paddy fields
There are human and animal health concerns related to drainage systems because nutrients, especially nitrogen and phosphorus, can contaminate water supplies. A field study was conducted on consolidated paddy fields of Sari Agricultural Sciences and Natural Resources University, Northern Iran (36.3°N, 53.04°E), to determine the effect of subsurface drain depth and spacing on nitrogen (N) and pho...
متن کاملsimulation of nitrate transport in mazandaran paddy field during canola cultivation season for water resources management
in this research, the appropriateness of drainmod-n model was evaluated for the simulation of nitrate transport with subsurface drainage in paddy fields. during a canola growing season from november 2011 to april 2012, the nitrate concentration of drainage water and soil saturation extracts of two depths of 30 and 60 cm was measured in consolidated paddy fields of sari agricultural sciences and...
متن کاملNitrate leaching to subsurface drains as affected by drain spacing and changes in crop production system.
Subsurface drainage is a beneficial water management practice in poorly drained soils but may also contribute substantial nitrate N loads to surface waters. This paper summarizes results from a 15-yr drainage study in Indiana that includes three drain spacings (5, 10, and 20 m) managed for 10 yr with chisel tillage in monoculture corn (Zea mays L.) and currently managed under a no-till corn-soy...
متن کاملa laboratory test on the effect of subsurface drain installation depth on nitrate leaching from a loamy sand soil
pipe drain installation depth is one of the most important design parameters, which has a key role in the drained water volume and quality. in this research, the effect of pipe drain installation depth was investigated by using a physical laboratory model. drains were installed at 0.25, 0.5 and 0.85 m deep in a cubical box with dimensions of 1*0.5*1 meter filled with a sandy loam soil. nitrate,...
متن کاملSOIL MANAGEMENT Subsurface Drain Losses of Water and Nitrate following Conversion of Perennials to Row Crops
tificial drainage, however, are well documented and include sediment, nutrient (N, P), and pesticide delivery Nitrate losses through subsurface drains in agricultural fields pose to surface waters via subsurface drain lines (Gast et al., a serious threat to surface water quality. Substantial reductions in drainage losses of NO3–N can occur with alfalfa (Medicago sativa 1978; Logan et al., 1980,...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
پژوهش های حفاظت آب و خاکجلد ۲۰، شماره ۶، صفحات ۲۳۷-۲۵۲
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023