...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant and Soil >Seed and leaf-spray inoculation of PGPR in brachiarias (Urochloa spp.) as an economic and environmental opportunity to improve plant growth, forage yield and nutrient status
【24h】

Seed and leaf-spray inoculation of PGPR in brachiarias (Urochloa spp.) as an economic and environmental opportunity to improve plant growth, forage yield and nutrient status

机译：PGPR在Brachiarias（Urochloa SPP）中的种子和叶片喷射接种。作为改善植物生长，饲料产量和营养状况的经济和环境机会

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose Brazil has 180 Mha of pastures, 86 Mha occupied with Urochloa spp. (syn. Brachiaria), and 70% in some level of degradation. Inoculation with plant-growth-promoting bacteria (PGPR) may represent an economic and environmental feasible strategy to improve pasture production. Methods Two greenhouse and seven field trials were performed to verify the effects of seed inoculation at sowing or leaf-spray inoculation in established pastures of Urochloa with elite strains of Azospirillum brasilense and Pseudomonas fluorescens. All plants received nutrients including 40 kg ha(-1) of N at sowing, and half of the treatments a supply of 40 kg ha(-1) of N 30 days after emergence. Results A. brasilense increased shoot biomass by an average of 16.8% with both seed and leaf-spray inoculation, whereas P. fluorescens increased by 15.2 and 14.2%, respectively, always higher with the extra supply of N. Seed and leaf-spray inoculation with A. brasilense increased N content by an average of 11.7 and 20.7%, and K by 9.9 and 11.3%, respectively; for P. fluorescens average increases were of 33.3 and 36.6% for P, and of 10.6 and 13.6% for K, respectively. Benefits were mainly attributed to improvements in root architecture by the synthesis of phytohormones. Biological nitrogen fixation in A. brasilense, P acquisition (solubilization of phosphates and siderophores synthesis) and ACC-deaminase in P. fluorescens also contributed to plant growth and nutrient status. Conclusion Inoculation with elite PGPR strains translated into more fodder and improved nutritional value of feed for livestock, representing a promising and environmentally-friendly strategy for tropical pastures.
机译：目的巴西有180个Mha的牧场，86个Mha的牧场被乌洛瓦属（syn.Brachiaria）占据，70%的牧场处于一定程度的退化状态。接种植物生长促进菌（PGPR）可能是提高牧草产量的经济和环境可行策略。方法采用2个温室试验和7个田间试验，以巴西固氮螺菌和荧光假单胞菌的优良菌株为材料，在已建立的羊草草场上验证播种接种或叶面喷雾接种的效果。所有植株在播种时都获得了包括40kg ha（-1）N的养分，其中一半的处理在出苗后30天获得了40kg ha（-1）N的供应。结果种子和叶面喷施接种均使巴西草的地上部生物量平均增加16.8%，而荧光假单胞菌则分别增加15.2%和14.2%，且在额外供应氮的情况下始终更高。种子和叶面喷施接种巴西草使氮含量平均增加11.7%和20.7%，钾含量平均增加9.9%和11.3%；对于荧光假单胞菌，P的平均增长率分别为33.3%和36.6%，K的平均增长率分别为10.6%和13.6%。主要得益于植物激素的合成改善了根系结构。巴西拟青蒿的生物固氮、磷的获取（磷酸盐的增溶和铁载体的合成）以及荧光拟青蒿的ACC脱氨酶也有助于植物生长和营养状况。结论接种优良的PGPR菌株可转化为更多的饲料，提高家畜饲料的营养价值，是一种很有前途的热带牧场环境友好策略。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号