Characterizing the growth promotion capabilities of phosphate solubilizing bacterial strains on canola and corn in a greenhouse setting

表征温室环境中双低油菜籽和玉米上解磷细菌菌株的生长促进能力

• 批准号: 507090-2017
• 负责人: Sparling, Richard
• 金额: $ 0.58万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Engage Plus Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640741
• 关键词: Characterizing; growth; promotion; capabilities; phosphate

Manure generated from hog farming can be a beneficial soil amendment for agricultural crops, since it is highin both nitrogen and phosphate. However, most of the phosphate is insoluble, and since the application regimeis based on nitrogen content, much of this insoluble phosphate accumulates over time. This limits the amountof hog manure that can be applied. In Manitoba, fields near hog farms have reached the limit of allowableadded phosphate, and the transport of manure any great distance becomes cost prohibitive limiting itsapplication to a wider region. While insoluble phosphorous can be effectively solubilized using chemicalacidification with sulphuric acid, mobilization of insoluble phosphorous to crop plants is often inefficient,reducing phosphorous removal into crop material and reducing potential crop yield. Manure solids left behindfrom the acid phosphorous solubilization step can serve as a soil conditioner and if supplemented withphosphate solubilizing, growth promoting bacteria can act as a source of beneficial bacteria for in situphosphate solubilization and mobilization to field crops. In the previous Engage grant, we have shown twostrains of Pseudomonas sp. isolated for KGS Engineering are effective at solubilizing calcium phosphate atnear neutral pH and have some efficacy in promoting plant growth in pure culture and in initial growthchamber studies using canola seeds and seedlings. The purpose of the current Engage+ proposal is to comparethe plant promotion capabilities for plant associated phosphate solubilization as well as further growthpromotion capabilities using Manitoba-relevant seed crops, with a focus on canola, and corn.

养猪场产生的粪便可以成为农作物的有益土壤改良剂，因为它含有大量的氮和磷。然而，大多数磷酸盐是不溶性的，并且由于施用制度是基于氮含量的，大部分这种不溶性磷酸盐随着时间的推移而积累。这限制了可以施用的猪粪量。在马尼托巴省，养猪场附近的农田已经达到了允许的磷酸盐极限，而且远距离运输粪便的成本太高，限制了它在更广泛地区的应用。虽然不溶性磷可以使用硫酸化学酸化有效地溶解，但不溶性磷向作物植物的移动通常是低效的，减少了磷向作物材料的去除并降低了潜在的作物产量。从酸性磷溶解步骤中留下的粪肥固体可以用作土壤调节剂，并且如果补充有磷酸盐溶解剂，则生长促进细菌可以用作有益细菌的来源，用于原位磷酸盐溶解和向田间作物的移动。在之前的Engage资助中，我们已经证明了为KGS工程分离的两株假单胞菌在接近中性的pH值下有效地溶解磷酸钙，并且在纯培养和使用卡诺拉种子和幼苗的初始生长室研究中对促进植物生长具有一定的功效。当前Engage+提案的目的是比较植物相关磷酸盐溶解的植物促进能力以及使用马尼托巴省相关种子作物（重点是油菜和玉米）的进一步生长促进能力。