Estimation of greenhouse gases emission factors of China's nitrogen, phosphate and potash fertilizers

Shun, 陈舜 Chen; Fei, 逯非 Lu; Wang, Xiaoke

doi:10.5846/stxb201402210304

Cited by 19 publications

(9 citation statements)

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“…As a result, as long as the soil nutrient level remains constant, chemical fertilizers must be used in conjunction with organic fertilizers. Only 38% of the nutrients in our farmland are now derived from organic fertilizers [32], and when compared to Denmark, where 70% of the nitrogen nutrients in farmland are derived from organic fertilizers [33], China's level of organic [35]. Furthermore, long-term organic fertilizer application not only sustains crop yields, but also enhances soil carbon sequestration and increases soil organic carbon content [36].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Total Organic Waste and Potential for Replacing Chemical Fertilizers in China

Shao

2024

Pol. J. Environ. Stud.

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The quantity of organic waste produced in China is enormous, and knowing the present situation of the country's total amount of organic waste and its nutritional supplies is important for both resource use and environmental safety. In order to analyze the potential for the utilization of organic wastes and the carrying capacity of the land, the current total amount of organic waste and its nutrient resources in China were estimated by reviewing Chinese statistical data and published literature. The study's objective was the production of major organic wastes (straw, livestock and poultry manure, rural human waste, sludge, and domestic organic waste) in China in 2021. The findings indicated that in 2021, its total resource would be 11.61×108 t, and its nutritional content would be 4075.24×104 t. In 2021, the nutrient contents of N, P 2 O 5 and K 2 O in the total nutrient content of organic waste in China were 1571.43×104 t, 733.52×104 t and 1770.29×104 t, respectively. In 2021, the N nutrient content of China's organic waste accounted for 67.48% of the recommended N application, the P 2 O 5 nutrient content accounted for 69.30% of the recommended phosphorus application, and the K 2 O nutrient content accounted for 131.09% of the recommended potassium application. From the perspective of China's overall scale, China has a large space for carrying and consuming livestock and poultry manure. When calculating the land carrying capacity based on nitrogen, the land carrying capacity index of China was 0.23, and when calculating the land carrying capacity based on phosphorus, the land carrying capacity index of China was 0.54. In general, China has a massive amount of organic waste materials and nutrients, with plenty of room for use. The current magnitude of farming places a minor strain on the land carrying capacity of animal manure. If the nutrient resource structure of China's organic waste remains unchanged and the entire amount is returned to the field, the nitrogen, phosphorus, and potassium nutrients in organic waste can satisfy 67.48%, 69.30%, and 100% of the nutrient requirements of various types of crops, respectively.

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Section: Discussionmentioning

confidence: 99%

Analysis of Total Organic Waste and Potential for Replacing Chemical Fertilizers in China

Shao

2024

Pol. J. Environ. Stud.

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“…Where 𝐸 is the CO2 equivalent emission，the unit is t CO2eq, Ei is the carbon emission of each agricultural material in the agricultural production process, Qi is the quantity of each agricultural material (including fertilizer, pesticide, agricultural machinery, agricultural irrigation and ploughing), and αi is the carbon emission coefficient of each agricultural material, with reference to the relevant literature [13][14][15][16][17][18] (Table 1). 44/12 is the conversion factor of carbon equivalent (CE) to CO2 equivalent.…”

Section: Carbon Emission Terms and Measurement Methods For Banana Pla...mentioning

confidence: 99%

Carbon Footprint of the Production Process of Tropical Banana Plantation Based on the Life Cycle Approach: A Case Study of Chengmai County, Hainan Province, China

KUANG,

SHI,

ZHAO

et al. 2024

Preprint

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Banana plantation is an important type of agro-ecosystem in the tropics, and it is important to carry out a quantitative assessment of the carbon footprint of the banana growing process for the development of low-carbon agriculture to cope with global warming. The carbon footprint of two banana cultivation processes was assessed using the life cycle assessment method through field trials and farmer surveys in Chengmai County, Hainan Province, China. The results showed that: (1) N2O emissions caused by the application of nitrogen fertilizers and compound nitrogen fertilizers were the largest source of carbon emissions from banana plantation farmland, and the production and transportation of common compound fertilizer were the second largest source of carbon emissions. Banana fruits and plants were the main contributors to carbon fixation in banana plantation ecosystems, with about 24.72 t CO2 eq hm-2 for Musa paradisiaca AA, and 34.66 t CO2 eq hm-2 for M. AAA Cavendish var. Brazil. (2) The annual carbon emissions of Musa paradisiaca AA and M. AAA Cavendish var. Brazil farmland systems were 35.40 t CO2 eq·hm-2 and 43.83 t CO2 eq·hm-2, respectively, and the annual carbon fixation was 38.23 CO2 eq·hm-2 and 48.17 CO2 eq·hm-2, respectively. The banana plantations had a negative carbon footprint per unit area, showing a net carbon sink function. (3) Banana is a plant with high carbon emission and strong carbon fixation capacity. Scientific management in the field can achieve the decrease of agricultural inputs, high quality and abundant agricultural products, and the reduction of carbon footprint of farmland.

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“…Some studies at home and abroad believe that [31][32][33], the land use of sludge stabilization products can replace part of phosphate fertilizer to achieve carbon emission reduction. It has been reported that the comprehensive carbon emission coefficient of phosphate fertilizer products in China is 0.63 t CO 2 /t P 2 O 5 [34]. Assuming that the phosphorus content in sludge stabilized products is 4%, of which about 50% is equivalent to that of phosphate fertilizer, the emission reduction will be about 2.8t CO 2 per 100 t sludge stabilized products (calculated as dry sludge).…”

Section: Literature Datamentioning

confidence: 99%

Species, Fractions and Nutritional Value of Phosphorus in the Typical Biological Treatment Process of Sludge

Zhao¹,

Luo²,

Jiang³

et al. 2023

Pol. J. Environ. Stud.

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Sludge treatment is an important part of wastewater treatment and the recovery and utilization of phosphorus from wastewater treatment plant (WWTP) is a challenge for sludge treatment and product disposal. In this paper, eight Chinese typical sludge treatment projects were selected to analyze the species and fractions, and characterization of phosphorus during the sludge treatment process. Furthermore, the nutritional value of phosphorus in the sludge treatment process and the land resource utilization value of phosphorus in the sludge treatment product were discussed. The results showed that the insufficient release of phosphorus to supernatant during anaerobic digestion (AD) of sludge is an important factor restricting phosphorus recovery. Phosphorus in sludge aerobic composting treatment products is mainly in the solid phase, and the concentration effect is beneficial for the phosphorus recovery potential. Phosphorus in sludge treatment products mainly exists in the form of non-apatite inorganic phosphorus, which indicates that improving the bioavailability of phosphorus in sludge treatment products is the key to realizing the nutritional value of the sludge products.

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Estimation of greenhouse gases emission factors of China's nitrogen, phosphate and potash fertilizers

Cited by 19 publications

References 1 publication

Analysis of Total Organic Waste and Potential for Replacing Chemical Fertilizers in China

Analysis of Total Organic Waste and Potential for Replacing Chemical Fertilizers in China

Carbon Footprint of the Production Process of Tropical Banana Plantation Based on the Life Cycle Approach: A Case Study of Chengmai County, Hainan Province, China

Species, Fractions and Nutritional Value of Phosphorus in the Typical Biological Treatment Process of Sludge

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