| Effects of straw returning on soil water characteristics and physical properties of black soil in Northeast China |
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| DOI：10.7606/j.issn.1000-7601.2024.01.23 |
| Key Words: straw returning to field black soil soil water characteristic soil structure three phase R value |
| Author Name | Affiliation | | ZHENG Hongbing | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | LUO Yang | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | SUI Pengxiang | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | LI Ruiping | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | WANG Hao | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | REN Ying | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | YUAN Ye | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | ZHOU Siqi | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | TIAN Shengtao | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | LIU Wuren | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China | | ZHENG Jinyu | Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science, Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun, Jilin 130033，China |
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| Abstract: |
| To determine the effects of straw returning on water characteristics and physical properties of black soil in Northeast China, three treatments were set up: straw mulching and returning (FG), straw overturning and returning (FM) and straw non\|returning (FD). Soil water content, water characteristic curve, bulk density, hardness, soil three\|phase ratio and structural stability were measured. The results showed as follows: (1) Straw mulching and returning treatment significantly increased the soil moisture content of 0~30 cm in spring by 11.17%~150.84% campared with straw no\|returning treatment. The change curve of soil water content in the middle suction section was smooth, and the straw mulching and returning treatment had higher soil water retention. (2) Straw returning to field can significantly improve soil water availability. Compared with straw non\|returning treatment, the field water capacity of 0~10 cm soil layer in straw mulching and returning treatment increased by 4.85%~11.03%, and the soil wilting coefficient increased by 10.85%~18.00%. Gravity water in 0~10 cm soil layer of straw overturning and returning treatment increased by 9.65% to 80.73%. The soil water supply capacity of straw overturning and returning treatment was increased, and specific water capacity was increased by 4.8%~10.0% compared with the straw non\|returning treatment. (3) Compared with straw non\|returning treatment, straw returning reduced soil compaction after harvest by 0.18~0.31 MPa. Straw mulching and returning treatment increased surface soil bulk density and decreased soil porosity. It promotes the rationality of three\|phase structure and significantly increases the stability of soil structure. (4) Pearson correlation analysis showed that the R value of the three ratios was significantly correlated with structural distance (R=0.73*), and soil bulk density (R=0.70*). Within a certain range, the increase of R value of the three ratios was conducive to improving and promoting the stability of soil structure. In conclusion, the implementation of straw returning in the northeastern black soil farmland was an effective measure to improve soil water content in spring, enhance soil water retention, enhance soil water supply capacity, adjust soil compaction, regulate soil, and improve soil structure and productivity ability. |
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