Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control
In the process of vegetation restoration for karst desertification management, the lack of scientific and rational intercropping technology and the blind application of large amounts of nitrogen fertilizer have made the soil the main source of atmospheric N<sub>2</sub>O in this region. H...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/14/8/1652 |
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| author | Tinghui Hu Kangning Xiong Jun Wang |
| author_facet | Tinghui Hu Kangning Xiong Jun Wang |
| author_sort | Tinghui Hu |
| collection | DOAJ |
| description | In the process of vegetation restoration for karst desertification management, the lack of scientific and rational intercropping technology and the blind application of large amounts of nitrogen fertilizer have made the soil the main source of atmospheric N<sub>2</sub>O in this region. How soil N<sub>2</sub>O emissions vary under different intercropping modes is a scientific question worthy of study. This study took a three-year-old loquat (<i>Eribotrya japonica</i> L.) artificial forest in the karst plateau canyon as the experimental site and designed loquat intercropping with peanut, corn, and sweet potato (<i>Ipomoeabatatas</i> (L.) Lam.) as well as non-intercropping to analyze the differences in soil physicochemical properties and greenhouse gas emissions under different intercropping patterns. The results showed that intercropping with peanut significantly increased loquat yield, soil moisture, temperature, SOC, MBC, TN, and MBN content. The emissions of N<sub>2</sub>O and CO<sub>2</sub>were mainly positively correlated with soil moisture and temperature, while CH<sub>4</sub> showed a negative correlation with soil moisture and soil temperature. The soil absorbed CH<sub>4</sub> in the control of karst desertification. Karst area soils exhibited higher N<sub>2</sub>O emissions. Intercropping patterns significantly influenced soil N<sub>2</sub>O emissions, with N<sub>2</sub>O-N cumulative emissions ranging from 5.28 to 8.13 kg·hm<sup>−2</sup> under different intercropping conditions. The lowest N<sub>2</sub>O-N cumulative emissions were observed for peanut intercropped under the forest. The peak N<sub>2</sub>O emission occurred in April 2022, which may be attributed to the higher rainfall and soil moisture during that month. Intercropping peanut with loquat significantly reduced the global warming potential. Therefore, intercropping peanut in young forests can improve soil water and fertilizer conditions, reduce soil N<sub>2</sub>O emissions and global warming potential, and serve as a nitrogen fixation and emission reduction technique suitable for karst desertification areas. |
| first_indexed | 2024-03-10T23:55:57Z |
| format | Article |
| id | doaj.art-14ef872eef7343188288833fe81068fd |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-10T23:55:57Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-14ef872eef7343188288833fe81068fd2023-11-19T01:10:03ZengMDPI AGForests1999-49072023-08-01148165210.3390/f14081652Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification ControlTinghui Hu0Kangning Xiong1Jun Wang2Guizhou Engineering Laboratory for Karst Desertification Control and Eco-Industry, School of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaGuizhou Engineering Laboratory for Karst Desertification Control and Eco-Industry, School of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaGuizhou Oil Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550006, ChinaIn the process of vegetation restoration for karst desertification management, the lack of scientific and rational intercropping technology and the blind application of large amounts of nitrogen fertilizer have made the soil the main source of atmospheric N<sub>2</sub>O in this region. How soil N<sub>2</sub>O emissions vary under different intercropping modes is a scientific question worthy of study. This study took a three-year-old loquat (<i>Eribotrya japonica</i> L.) artificial forest in the karst plateau canyon as the experimental site and designed loquat intercropping with peanut, corn, and sweet potato (<i>Ipomoeabatatas</i> (L.) Lam.) as well as non-intercropping to analyze the differences in soil physicochemical properties and greenhouse gas emissions under different intercropping patterns. The results showed that intercropping with peanut significantly increased loquat yield, soil moisture, temperature, SOC, MBC, TN, and MBN content. The emissions of N<sub>2</sub>O and CO<sub>2</sub>were mainly positively correlated with soil moisture and temperature, while CH<sub>4</sub> showed a negative correlation with soil moisture and soil temperature. The soil absorbed CH<sub>4</sub> in the control of karst desertification. Karst area soils exhibited higher N<sub>2</sub>O emissions. Intercropping patterns significantly influenced soil N<sub>2</sub>O emissions, with N<sub>2</sub>O-N cumulative emissions ranging from 5.28 to 8.13 kg·hm<sup>−2</sup> under different intercropping conditions. The lowest N<sub>2</sub>O-N cumulative emissions were observed for peanut intercropped under the forest. The peak N<sub>2</sub>O emission occurred in April 2022, which may be attributed to the higher rainfall and soil moisture during that month. Intercropping peanut with loquat significantly reduced the global warming potential. Therefore, intercropping peanut in young forests can improve soil water and fertilizer conditions, reduce soil N<sub>2</sub>O emissions and global warming potential, and serve as a nitrogen fixation and emission reduction technique suitable for karst desertification areas.https://www.mdpi.com/1999-4907/14/8/1652karst desertification controlloquatvegetation restorationintercropping peanutN<sub>2</sub>O emission |
| spellingShingle | Tinghui Hu Kangning Xiong Jun Wang Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control Forests karst desertification control loquat vegetation restoration intercropping peanut N<sub>2</sub>O emission |
| title | Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control |
| title_full | Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control |
| title_fullStr | Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control |
| title_full_unstemmed | Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control |
| title_short | Intercropping Peanut under Forests Can Reduce Soil N<sub>2</sub>O Emissions in Karst Desertification Control |
| title_sort | intercropping peanut under forests can reduce soil n sub 2 sub o emissions in karst desertification control |
| topic | karst desertification control loquat vegetation restoration intercropping peanut N<sub>2</sub>O emission |
| url | https://www.mdpi.com/1999-4907/14/8/1652 |
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