Biological nitrification inhibition and forage productivity of Megathyrsus maximus in Colombian dry tropics
Biological nitrification inhibition and forage productivity of Megathyrsus maximus in Colombian dry tropics
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DOI：
10.17221/445/2020-pse
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发表时间：
2021-04
影响因子：
2.4
通讯作者：
J. Carvajal-Tapia;S. M. Velasco;D. Villegas;J. Arango;N. J. V. Quila
中科院分区：
文献类型：
--
作者：
J. Carvajal-Tapia;S. M. Velasco;D. Villegas;J. Arango;N. J. V. Quila
农艺，营养和环境方面的综合，以促进可持续的热带草原生产。生物硝化抑制（BNI）是一种以植物为基础的策略，通过分泌抑制性化合物来抑制土壤硝化的速度，从而提高草的氮素利用效率。为了评估BNI对大田条件下大穗菊生产性能的影响，我们评估了哥伦比亚干旱热带地区27份种质资源和商业牧草品种的收集。我们测量了植物产量干物质，营养质量参数，土壤硝化速率在22个月后建立牧场。我们的研究结果突出了种质资源的上级农艺性能（干物质生产和营养品质）和高能力，以减少硝化作用。虽然农艺方面，营养方面和硝化率之间没有关系，我们得出结论，有没有农艺或营养的惩罚对环境友好的草，和BNI可以通过作为目标性状的植物育种计划对生态高效牧草的发展，并有助于畜牧系统的可持续集约化。
Agronomic, nutritional, and environmental aspects are integrated to promote sustainable tropical grassland production. Biological nitrification inhibition (BNI) is a plant-based strategy to improve nitrogen use efficiency by grasses in which they suppress the pace of soil nitrification via exudation of inhibitory compounds. To evaluate the effect of BNI on the productive performance of Megathyrsus maximus under field conditions, we evaluated a collection of 27 germplasm accessions and commercial cultivars of the forage grass in the dry tropics of Colombia. We measured plant yield dry matter, nutrition quality parameters, and nitrification rates of soil at 22 months after pasture establishment. Our results highlighted germplasm accessions of superior agronomic performance (for dry matter production and nutrition quality) and high capacity to decrease nitrification. Although no relation was observed between agronomic aspects, nutritional aspects, and nitrification rates, we conclude that there is no agronomic or nutritional penalty on environmentally friendly grasses, and BNI could be adopted as a target trait in plant breeding programs toward the development of eco-efficient forages and contribute to the sustainable intensification of livestock systems.