| Effects of different tillage methods on soil aggregate organic carbon and inorganic carbon of maize farmland in arid regions |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2026.01.18 |
| Key Words: tillage methods farmland in arid areas soil aggregates organic carbon inorganic carbon |
| Author Name | Affiliation | | ZHANG Zengcheng | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China
Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China | | JIANG Guiju | Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China
Bole City Agricultural and Rural Mechanization Development and Service Center, Bole, Xinjiang 833400, China | | GU Jiacheng | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China
Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China | | LI Shiqiang | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China
Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China | | LI Luhua | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China
Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China | | WANG Jiaping | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China
Corn Science and Technology Courtyard of Shihezi University, Bole, Xinjiang 833440, China |
|
| Hits: 735 |
| Download times: 116 |
| Abstract: |
| To investigate the effects of different tillage practices on soil organic and inorganic carbon contents in arid farmland and to provide theoretical support for optimizing carbon sequestration in soil aggregates under conservation tillage, a fixed\|site field experiment with spring maize was conducted from 2022 to 2024. Four tillage treatments were established: bare tillage (BT), plastic film mulching (CT), no\|tillage (NT), and shallow tillage (ST). The distribution characteristics of different soil aggregate fractions and their organic and inorganic carbon contents across soil layers were analyzed. The results showed that: (1) In 2024, compared with BT, the ST treatment increased the percentage of >2 mm aggregates in the 0-20 cm layer by 24.7%, while CT, NT, and ST reduced the percentage of <0.25 mm aggregates by 1.2%, 0.8%, and 96.4%, respectively. (2) From 2022 to 2024, in the 0-20 cm layer, the ST treatment increased the organic carbon content in >2 mm aggregates by 82.1% to 115.2%, and 92.1% to 132.6% compared with BT and CT, respectively, and increased that in 1-2 mm aggregates by 16.7% to 35.6%, and 72.3% to 88.2%, respectively. Soil aggregate organic carbon was mainly concentrated in the >2 mm fraction. Under film mulching, aggregate organic carbon content gradually decreased over the experimental years, with a reduction of 21.3% to 45.5%. (3) In 2024, the soil inorganic carbon content under CT decreased by 22.3% compared to that in 2022, with no significant differences in soil aggregate inorganic carbon content across aggregate size fractions. From 2022 to 2024, in the 0-60 cm layer, the ST treatment significantly increased soil inorganic carbon content by 10.2% to 93.6% compared to the BT treatment. (4) In 2024, compared with the other three treatments, ST treatment significantly increased the geometric mean diameter (GMD) of soil aggregate by 8.6% to 17.9%, 12.5% to 32.8%, and 8.6% to 17.9%, and the mean weight diameter (MWD) by 5.7% to 11.6%, 7.5% to 16.9%, and 5.9% to 11.6% of 0-60 cm soil layer. In summary, shallow tillage is conducive to improving soil organic carbon content, enhances aggregate stability, and promotes organic carbon accumulation within aggregates. It can be recommended as an effective practice for optimizing the physicochemical properties of maize farmland in arid regions. |
|
|
|