Opportunities for Meeting Crop Nitrogen Needs from Symbiotic Nitrogen Fixation
Opportunities for Meeting Crop Nitrogen Needs from Symbiotic Nitrogen Fixation
复制标题
DOI：
10.2134/asaspecpub46.c4
复制
发表时间：
2015-10
期刊：
影响因子：
--
通讯作者：
G. H. Heichel;D. Barnes
中科院分区：
文献类型：
--
作者：
G. H. Heichel;D. Barnes
氮是主要作物养分中最重要和最昂贵的。能源密集型商业氮肥成本的不断上升，以及对开发节能种植系统作为廉价食物来源的关注，提高了生产者、决策者和科学家通过共生固定满足部分或全部作物氮需求的兴趣。本章探讨了用根瘤菌-豆科植物共生固氮代替商业氮肥的前景和限制。我们强调基于利用、管理和改进现有能够共生固氮的作物品种的技术，而不是推测创造新的固氮植物的不确定前景。
Nitrogen is the most important and most expensive of the major crop nutrients. The escalating costs of energy-intensive commercial N fertilizers and the concern to develop energy-frugal cropping systems as sources of less expensive food have heightened the interests of producers, policymakers, and scientists in meeting part or all of crop N needs through symbiotic fixation. This chapter examines the prospects of and constraints to substituting N2 fixed by the Rhizobium-legume symbiosis for commercial N fertilizers in cropping systems. We emphasize technologies based upon the use, management, and improvement of existing crop species capable of symbiotic N2 fixation, rather than speculating on the uncertain prospects of creating new N2-fixing plants.