| Regulatory effects of biochar\|mediated saline\|alkali soil improvement on cotton growth |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2025.06.20 |
| Key Words: cotton biochar saline\|alkali soil soil physicochemical property |
| Author Name | Affiliation | | ZHU Bing | Henan Haihe River Basin Water Resources Affairs Center, Xinxiang, Henan 453002, China | | WANG Yuting | Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang, Henan 453002, China | | GENG Shiyi | Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang, Henan 453002, China | | ZHAO Qingqing | Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang, Henan 453002, China |
|
| Hits: 190 |
| Download times: 63 |
| Abstract: |
| To investigate the regulatory effects of biochar on the physicochemical properties of saline\|alkali soil and cotton growth, four biochar application rates were tested: 0% (BC0, control), 1% (BC1), 3% (BC3), and 5% (BC5). Soil salinity, pH, nutrient availability, and growth parameters of salt\|sensitive (SS) and salt\|tolerant (ST) cotton varieties were analyzed under these treatments. Field experiments conducted during 2021-2022 demonstrated that biochar significantly altered soil salinity distribution: salinity in the 0~20 cm layer decreased by up to 51.60%, but accumulated in the 20~40 cm layer. Biochar had no significant impact on soil pH and markedly increased total nitrogen, available phosphorus, and available potassium contents in a dose\|dependent manner. Notably, biochar effects on soil properties did not differ significantly between cotton genotypes. Biochar application exerted contrasting effects on cotton growth: BC1 enhanced plant height, stem diameter, and biomass during the seedling stage, whereas BC3 and BC5 exhibited inhibitory effects. Compared to BC3 and BC5, BC1 increased plant height, stem diameter, and biomass by 4.65%~48.89%, 3.29%~42.62%, and 3.42%~245.82%, respectively. These findings highlight that a 1% biochar application rate optimally ameliorates saline\|alkali soil and promotes cotton growth. |
|
|
|