培养物对n2o形成的影响

Sindija Liepa, Kristaps Siltumens, Jovita Pilecka-Ulcugaceva, I. Grīnfelde, Dace Butenaite
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摘要

作物种植有利于减少土壤侵蚀和养分流失,但关于作物种植如何影响一种强效温室气体二氧化氮(N2O)的排放,目前存在相互矛盾的信息。在植物演替中,明智地选择栽培作物被认为是保持作物生产力的有效途径。本文研究了栽培作物对土壤N2O排放的影响。这项研究使用了八种作物:大麦、荞麦、三叶草、燕麦、土豆、春小麦、冬小麦和油菜。在32个试验区和1个对照区采集样本。因此,样品被称重在3升桶中,每桶总计1.8公斤。每个地块称重两个样品,以考虑不同的湿度制度。润湿是专为湿好氧和湿厌氧土壤条件。还收集了土壤湿润后土壤重量变化的信息。在实验室条件下,使用Picarro G5131-i设备进行了N2O同位素的测量。收集所得数据并进行分析。结果表明,并非所有得到的N2O同位素数据分散差异都与栽培作物有直接关系,不能排除土壤物理性质、肥料使用和微生物种群的影响。- 15NSP值的最大值为18.58,最小值为-53.41。另一方面,15Nbulk值的最大值为26.76,最小值为-56.97。结果表明,硝化作用和反硝化作用在各培养物中均占主导地位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INFLUENCE OF GROWN CULTURE ON N2O FORMATION
Crop cultivation is beneficial for reducing soil erosion and nutrient loss, but there is conflicting information on how crop cultivation affects emissions of nitrogen dioxide (N2O), a potent greenhouse gas. Judicious selection of the cultivated crop in a plant succession is considered an effective approach to maintaining crop productivity. In this paper, we investigated the effects of cultivated crops on soil N2O emissions. Eight crops were used in this study: barley, buckwheat, clover, oats, potatoes, spring wheat, winter wheat and canola. Samples were collected in 32 experimental plots as well as a control plot. The samples are thus weighed in 3 l buckets, each 1.8 kg in total. Two samples were weighed from each plot to allow for different moisture regimes. Moistening is designed for wet aerobic and wet anaerobic soil conditions. Information on changes in soil weight after soil wetting was also collected. Measurements of N2O isotopes were performed using the Picarro G5131-i equipment in laboratory conditions. The obtained data were collected and analyzed. It was concluded that not all the obtained differences in N2O isotope data dispersion can be directly related to the cultivated crop, the physical properties of the soil, the use of fertilizers and the influence of the microorganism population cannot be excluded. The maximum value of ?15NSP value is 18.58 and the minimum value is -53.41. On the other hand, the maximum value of ?15Nbulk values is 26.76, and the minimum value is -56.97. In the conclusions, we get that both nitrification and denitrification dominate among cultures.
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