کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4570919 | 1629212 | 2016 | 11 صفحه PDF | دانلود رایگان |
• We describe the selection of zeolitite/soil ratio with two greenhouse experiments.
• The effect of NH4-charged zeolitite on nitrate leaching and plant characteristics was assessed in lysimeters.
• We carried out a ranking approach of all parameters analyzed for overall evaluation.
• The applications of 30 or 50 t ha− 1 NH4-charged zeolitite may be scaled-up in open field studies.
• The reduction of chemical fertilizer was feasible, allowing a limitation in groundwater pollution by nitrates.
Nitrate leaching and the resulting groundwater contamination from intensive crop production has become a major concern for long-term farmland efficiency and environmental sustainability in Italy. The aim of this study was to evaluate a water-saving NH4-charged zeolitite (produced by a new prototype) for minimizing NO3-leaching from soil and optimizing corn growth and yield. Forty-eight zeolitite:soil lysimeters in two trials were installed in a greenhouse to study the growth and yield characteristics of maize (Zea mays) as well as the nitrate concentration in leachate under different fertilizing conditions (i.e., standard, high or 70%, medium or 50% and low or 30% of conventional fertilization rate) and NH4-charged zeolitite (control, 0; dose-1, 50 t ha− 1 and dose-2, 100 t ha− 1) treatments. The results implicitly suggest that plants may have a better response if NH4-charged zeolitite is used with a limited amount of conventional fertilizer, allowing a reduction of nitrate concentration in drainage.
Journal: CATENA - Volume 140, May 2016, Pages 66–76