Gaseous losses of fertilizer nitrogen from a citrus orchard in the red soil hilly region of Southeast China
- 3 September 2017
- journal article
- soil physics
- Published by Taylor & Francis Ltd in Soil Science and Plant Nutrition
- Vol. 63 (5), 419-425
- https://doi.org/10.1080/00380768.2017.1381572
Abstract
The gaseous losses of fertilizer nitrogen (N) applied to agroecosystems are a major contributor to a host of environmental problems, inefficient production systems, and decreased N-use efficiency. These losses lead to the wastage of resources, increasing the greenhouse effect and harming human health. The red soil hilly region of Southeast China houses the biggest orchard area of the world, and nitrogen fertilizers are usually heavily applied to the orchard systems in China. Therefore, this study aimed to measure the gaseous losses of the fertilizer N by ammonia (NH3) volatilization and denitrification losses using the venting method and acetylene inhibition method respectively, and to assess the potential environmental risk of NH3 and nitrous oxide (N2O) emission from this orchard system based on the recent orchard management practices. An experiment was conducted in an Ougan citrus (Citrus reticulata Blanco ‘Suavissima’) orchard in the red soil hilly region of Southeast China. Three fertilization treatments, including the control (no N fertilizer, CK), poultry manure (at a rate of 6.3 t/ha, OM), and conventional fertilization (OM 6.3 t/ha + chemical fertilizer 393 kg N/ha, CF), were used. In all treatments, the fertilizers were incorporated into the soil after application. The test results, which were continuously determined within one year, indicated that the NH3 volatilization losses accounted for 4.5% of the OM nitrogen (OM-N) and 2.9% of the CF nitrogen (CF-N), whereas the denitrification N losses accounted for 2.1% of the OM-N and 2.9% of the CF-N. Overall, the total gaseous N losses (including NH3 volatilization losses and denitrification N losses) were 5.8% in the CF treatment. A relatively higher N2O flux, accounting for 1.8% of the CF-N, emitted from the CF treatment.Keywords
Funding Information
- National Natural Science Foundation of China (31270556)
This publication has 41 references indexed in Scilit:
- Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchardCiência E Agrotecnologia, 2016
- The fate of urea nitrogen applied to a vegetable crop rotation systemNutrient Cycling in Agroecosystems, 2015
- Ammonia in the atmosphere: a review on emission sources, atmospheric chemistry and deposition on terrestrial bodiesEnvironmental Science and Pollution Research, 2013
- Nitrogen losses from the soil/plant system: a reviewAnnals of Applied Biology, 2013
- Spatiotemporal variation of event related N2O and CH4 emissions during fertigation in a California almond orchardEcosphere, 2013
- Absorption of 15NH3 volatilized from urea by Citrus treesPlant and Soil, 2012
- Gaseous Emissions of Nitrogen from Grazed Pastures: Processes, Measurements and Modelling, Environmental Implications, and MitigationPublished by Elsevier BV ,2004
- Nitrogen losses from fertilizers applied to maize, wheat and rice in the North China PlainNutrient Cycling in Agroecosystems, 2002
- Annual denitrification rates in agricultural and forest soils: a reviewSoil Research, 1999
- Field Evaluation of Four Methods for Measuring DenitrificationSoil Science Society of America Journal, 1991