Hog‐Manure‐Recovered Struvite: Effects on Canola and Wheat Biomass Yield and Phosphorus Use Efficiencies
Hog‐Manure‐Recovered Struvite: Effects on Canola and Wheat Biomass Yield and Phosphorus Use Efficiencies
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猪粪回收鸟粪石：对双低油菜籽和小麦生物量产量和磷利用效率的影响
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Cicek
中科院分区：
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作者：
Y. Katanda;F. Zvomuya;D. Flaten;N. Cicek
以六水合磷酸铵镁（MgNH·PO·H2O）（通常称为鸟粪石）的形式回收粪肥磷，可以减轻养猪场对地表水体的磷污染风险。鸟粪石缓释磷有助于提高作物磷素利用率。该温室生物测定评估了液体猪粪回收鸟粪石的农艺效果。研究了鸟粪石、磷酸二氢铵（MAP）和聚合物包膜MAP（CMAP）对油菜（Brassica napus L.）与春小麦轮作在两种低磷（Olsen P < 6 mg kg）土壤中：桑迪灰壤（Typic Haplaquent）和粘壤质Orthic黑壤土（Udic Boroll）。肥料以1.1和2.2 g P m ²的速率施用在种子行或边带中。在两种土壤中，鸟粪石产生的油菜干物质（DM）产量（DMY，2.4 g kg土），磷吸收量（5.9 mg P kg土），磷回收率（43%）和农学效率（0.15 g DM mg土）与第一季的MAP和CMAP相似。此外，在2.2 g P m ²速率下，鸟粪石在第二作物阶段产生的卡诺拉DMY显著高于MAP，在第三作物阶段产生的MAP和CMAP均显著高于MAP。总体而言，小麦没有产生显着的反应，磷施肥。这些结果表明，鸟粪石回收液体猪粪便可以提供足够的磷，以维持产量和磷利用效率匹配或超过MAP。
Recovery of manure P as magnesium ammonium phosphate hexahydrate (MgNH₄PO₄∙6H₂O), commonly known as struvite, can mitigate the risk of P contamination of surface water bodies from hog operations. The slow release of P from struvite may help improve crop P use efficiency. This greenhouse bioassay evaluated the agronomic effectiveness of liquid hog manure recovered struvite. Struvite, monoammonium phosphate (MAP), and polymer-coated MAP (CMAP) were evaluated for canola (Brassica napus L.) grown in rotation with spring wheat (Triticum aestivum L.) in two low soil test P (Olsen P < 6 mg kg⁻¹) soils: a sandy Gleyed Regosol (Typic Haplaquent) and a clay loamy Orthic Black Chernozem (Udic Boroll). The fertilizers were applied either in the seed row or in a sideband at 1.1 and 2.2 g P m⁻² rates. In both soils, struvite produced canola dry matter (DM) yield (DMY, 2.4 g kg⁻¹ soil), P uptake (5.9 mg P kg⁻¹ soil), P recovery efficiency (43%), and agronomic efficiency (0.15 g DM mg⁻¹ P) that were similar to those of MAP and CMAP in the first crop phase. Moreover, at the 2.2 g P m⁻² rate, struvite produced significantly greater canola DMY than MAP in the second crop phase and both MAP and CMAP in the third crop phase. Overall, wheat did not produce significant responses to P fertilization. These results indicate that struvite recovered from liquid hog manure can supply sufficient P to sustain yields and P use efficiency matching or exceeding those for MAP.