Little fertilizer response but high N loss risk of maize on a productive organic-sandy soil

摘要: Information on the environmental impact of maize production is actually inconsistent. Indeed some experiments report good nitrogen (N) efficiencies and small residual N. Other show large leaching losses, while in practice often coupled with an intensive N surpluses. Here, we present data from a 4-year experiment silage sandy soil high mineralization potential. The experimental set-up included three input forms, mineral, cattle pig slurry four rates total N, 0, 80, 160 240 kg ha−1 year−1 use suction cups. Results that dry matter yields for N0–N240 were relatively consistent (158–192 ha−1). Further findings mineral nitrogen, 138–237 ha−1, nitrate concentrations water during winter, 39–73 mg NO3–N L−1, corresponding to losses 86–152 ha−1. Response was apparent recoveries 14–22% manures fertilizers. We conclude caution needed when extended fields apparently potential as grassland would be better alternative regard losses.