抑制玉米硝化作用减轻土壤氮损失的鉴定

IF 2.3 3区 农林科学 Q1 AGRONOMY
Firdausi Nur Azizah, B. Purwanto, K. Tawaraya, D. Rachmawati
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引用次数: 0

摘要

:在好氧或厌氧条件下,土壤中氮动力学的氧化和还原过程会产生N2 O排放。为了减少氮的排放和保护氮,最近的研究集中在从根系分泌物中提取的抑制硝化作用的化学物质上。然而,选择性植物育种可以用来控制土壤中的硝化活性,而不是化肥或合成硝化抑制剂。在本研究中,我们研究了11个具有不同硝化抑制水平(NI)的玉米品种的硝化速率(NR)与相关氮动力学和植物特性之间的关系,并与作为阳性对照的胡氏Brachicaria humidicola(Bh)进行了比较。在温室试验中,测量了土壤中NI、NR、NH4+-N和NO3--N的浓度以及植物对氮的吸收。六个玉米品种的NR比Bh低1.1–1.6倍。低NR品种具有较高的NI和较低的根冠比。NI与总氮和总氮含量呈正相关,但与累积的N2O和NH4+-NO3–不呈正相关。这些结果表明,玉米具有降低土壤硝化作用的能力,同时增加了土壤中的总氮和玉米地上部的氮含量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Identification of nitrification inhibition in maize to mitigate soil nitrogen loss
: Under aerobic or anaerobic conditions, oxidation and reduction processes of nitrogen dynamics in the soil produce N 2 O emissions. To decrease N 2 O emissions and conserve nitrogen (N), recent studies have focused on chemicals derived from root exudates that inhibit nitrification. However, selective plant breeding could be used to control nitrification activity in soil instead of fertilisers or synthetic nitrification inhibitors. In this study, we investigated the relationship between nitrification rates (NR) and related N dynamics and plant characteristics for 11 maize cultivars with varying levels of nitrification inhibition (NI) compared to Brachicaria humidicola ( Bh ) as the positive control. In a greenhouse experiment, soil concentrations of NI, NR, NH 4+ -N, and NO 3– -N and nitrogen uptake by plants were measured. Six maize cultivars had a 1.1–1.6 times lower NR than Bh . Low-NR cultivars had higher NI and lower root-to-shoot ratios. NI was positively correlated with total N and shot N content but not with cumulative N 2 O and NH 4+ -NO 3– . These results show that maize has the capacity to reduce soil nitrification while increasing the total N in the soil and shoot N content in maize.
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来源期刊
Plant, Soil and Environment
Plant, Soil and Environment Agronomy, Soil Science-农艺学
CiteScore
4.80
自引率
4.20%
发文量
61
审稿时长
2.4 months
期刊介绍: Experimental biology, agronomy, natural resources, and the environment; plant development, growth and productivity, breeding and seed production, growing of crops and their quality, soil care, conservation and productivity; agriculture and environment interactions from the perspective of sustainable development. Articles are published in English.
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