AgScience Research, 333 Chain Hills Road, R.D. 1., Dunedin, 9076, New Zealand.
Lincoln University, Ellesmere Junction Road, Lincoln, 7647, New Zealand.
Sci Rep. 2020 Feb 24;10(1):3227. doi: 10.1038/s41598-020-60024-3.
Agriculture's most pressing challenge is raising global food production while minimising environmental degradation. Nutrient deficiencies, principally nitrogen (N), limit production requiring future increases in fertiliser use and risk to proximal non-agricultural ecosystems. We investigated combining humate with urea, globally the most widely used N-suppling fertiliser, in a four-year field study. Humate increased pasture yield by 9.8% more than urea and significantly altered soil microbial diversity and function. Humate increased N retention suggesting microbial sequestration may lower N leaching and volatilisation losses. Humic microbial bio-stimulation could feasibly increase fertiliser efficiency and development of ecologically sustainable agriculture.
农业面临的最紧迫的挑战是在尽量减少环境退化的同时提高全球粮食产量。营养缺乏，主要是氮（N），限制了生产，需要未来增加肥料的使用并对临近的非农业生态系统造成风险。我们在一项为期四年的田间研究中调查了腐殖酸与尿素的结合，尿素是全球应用最广泛的 N 供应肥料。腐殖酸使牧草产量比尿素多增加 9.8%，并显著改变了土壤微生物的多样性和功能。腐殖酸增加了 N 的保留，这表明微生物固持可能会降低 N 的淋溶和挥发损失。腐殖质微生物生物刺激作用可以提高肥料的效率，并促进生态可持续农业的发展。
