EFFECT OF DELAYED NITROGEN FERTILIZATION ON MAIZE (ZEA MAYSL.) GRAIN YIELDS AND NITROGEN USE EFFICIENCY
| العنوان: | EFFECT OF DELAYED NITROGEN FERTILIZATION ON MAIZE (ZEA MAYSL.) GRAIN YIELDS AND NITROGEN USE EFFICIENCY |
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| المؤلفون: | William R. Raun, Olga S. Walsh, Art Klatt, John B. Solie |
| المصدر: | Journal of Plant Nutrition. 35:538-555 |
| بيانات النشر: | Informa UK Limited, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Physiology, chemistry.chemical_element, engineering.material, Nitrogen, Zea mays, Crop, Nitrogen fertilizer, Agronomy, chemistry, N application, engineering, Grain yield, Fertilizer, Agronomy and Crop Science, Mathematics |
| الوصف: | Maize grain yield potential can be estimated mid-season using NDVI at the V8 growth stage, thus affording delayed sidedress nitrogen (N) application. Several combinations of preplant and sidedress N at various growth stages were evaluated. Maize grain yields were maximized with 90 kg N ha-1 preplant followed by 90 kg N ha-1 sidedress at V6 or V10 (8 of 9 site-years). Delaying N application until V10 growth stage when preplant N was applied did not result in lower yields. Mid-season N supplies fertilizer at the time when crop need and N uptake are at a maximum, and thus facilitates more efficient N use. Lowest nitrogen use efficiencies (NUE) were observed with higher N rates and when all N was applied preplant. Highest NUE's were achieved with 45 kg N ha-1 preplant followed by 45 kg N ha-1 sidedress applied at V6 growth stage (8 of 9 site-years) and at V10 (6 of 9 site-years). |
| تدمد: | 1532-4087 0190-4167 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::b69498d2f96dd1058d2c86decab39957Test https://doi.org/10.1080/01904167.2012.644373Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........b69498d2f96dd1058d2c86decab39957 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15324087 01904167 |
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