Effect of fertilizer nitrogen management and phosphorus placement on canola production under varied conditions in Saskatchewan
| Autor: | William E. May, S. A. Brandt, G. Hultgreen, Reynald Lemke, S. P. Mooleki, J. J. Shoenau, Hong Wang, Sukhdev S. Malhi, Dil Thavarajah, G. P. Lafond |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Canadian Journal of Plant Science. 89:29-48 |
| ISSN: | 1918-1833 0008-4220 |
| DOI: | 10.4141/cjps08025 |
| Popis: | No-till (NT) requires all fertilizer nutrients to be applied during planting, but high rates of fertilizer nitrogen (N) in close proximity to the seed can negatively affect seedling development; therefore, different placement technologies have been developed to place seed and N in a single operation while maintaining an adequate separation between them. We conducted a 3-yr field study (2000 to 2002) at four sites in Saskatchewan. The objective was to determine the effects of N fertilizer form [urea (U) and anhydrous ammonia (AA)], placement [broadcast, side-band (SB) and mid-row band (MRB)], timing (fall vs. spring), rate (0 to 90 or 120 kg N ha-1), and P fertilizer placement on yield, seed protein content and N uptake in canola. The N fertilizer managements had no significant effect on crop emergence. Yield, seed protein concentration and N uptake increased with increasing N fertilizer rate. Seed protein was significantly higher on SB compared with MRB and on U compared with AA. Seed yield and seed and straw N uptake were higher when U was SB compared with broadcast. Plant density was higher when P was placed in SB rather than with the seed, but the reverse was true for seed yield and seed N uptake. Key words: Anhydrous ammonia, N timing, N form, N and P placement, N uptake, yield |
| Databáze: | OpenAIRE |
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