Nitrogen dynamics following slurry injection in maize: crop development
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- 作者：Carl-Philipp Federolf ; Matthias Westerschulte…
- 关键词：Starter fertilizer ; Nitrogen uptake ; Nitrification inhibitor ; Liquid manure injection ; Phosphorus ; Pig slurry
- 刊名：Nutrient Cycling in Agroecosystems
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：107
- 期：1
- 页码：19-31
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Agriculture;
- 出版者：Springer Netherlands
- ISSN：1573-0867
- 卷排序：107
文摘
Using pig slurry as starter fertilizer for maize (Zea mays L.), injected below the row prior to planting is a reasonable way to omit application of additional mineral fertilizer in areas with intensive animal farming. However, delayed early growth and a lack of knowledge on nutrient availability limit the interest of farmers. To extenuate farmers concerns a field trial was conducted in 2014 and 2015 to get detailed information on nitrogen (N) uptake, the subsequent influences on crop growth at different vegetative growth stages and final yield of silage maize. Besides an unfertilized control, two liquid manure injection treatments (without and with nitrification inhibitor [NI]) were compared to slurry broadcast application + mineral N and phosphorus (P) starter fertilizer at planting (MSF). In 2014, NI treatment yields increased (+16.5%) and N uptake increased (+9.6%) compared to broadcast treatment. In 2015, cold and dry conditions during early growth limited P plant availability and reduced crop growth in treatments without MSF. However, when a NI was added to the slurry prior to application, plants showed less P deficiency symptoms and better growth. At harvest no differences between the fertilized treatments were observed. In both years apparent N recovery was increased when manure was injected (48% without, and 56% with NI, respectively) compared to broadcast application of manure (43%) indicating that N losses were lower. However, further knowledge on soil N transformation and N loss pathways in systems with slurry injection is needed.