| Effects of different amendments on bacterial communities and soil nutrients of soybean continuous cropping in black soil area |
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| DOI：10.7606/j.issn.1000-7601.2024.04.14 |
| Key Words: soil amendments continuous cropping of soybean soil acidification soil nutrients bacterial community structure microbial diversity |
| Author Name | Affiliation | | SUN Yizhuo | College of Agriculture，Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163000, China | | CAI Shanshan | Heilongjiang Institute of Black Soil Protection and Utilization, Harbin, Heilongjiang 150086, China | | CHEN Xuel | Heilongjiang Institute of Black Soil Protection and Utilization, Harbin, Heilongjiang 150086, China | | WANG Wei | Heilongjiang Institute of Black Soil Protection and Utilization, Harbin, Heilongjiang 150086, China | | GUO Wei | College of Agriculture，Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163000, China | | GAO Zhongchao | Heilongjiang Institute of Black Soil Protection and Utilization, Harbin, Heilongjiang 150086, China | | LIU Yuanyuan | Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | LIU Huiying | Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | SUN Haiyan | College of Agriculture，Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163000, China | | SUN Lei | Heilongjiang Institute of Black Soil Protection and Utilization, Harbin, Heilongjiang 150086, China |
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| Abstract: |
| To identify the alleviating effects of different alkaline soil amendments on soybean continuous cropping obstacles in black soil area, six different fertilization treatments including plot planting, namely no fertilization (CK), conventional fertilization (CF), phosphorus fertilizer reduction + calcium\|magnesium\|phosphorus fertilizer improver (CPK), conventional fertilization + biochar (CBK), conventional fertilization + quicklime (CNK) and conventional fertilization + humic acid fertilizer (CHK) were set up in 2023. No fertilization (CK) and conventional fertilization (CF) were used as controls, and the physical and chemical properties of soil and the diversity and richness of soil microbial and bacterial communities were determined. The results showed that compared with the CK and CF treatments, the application of amendments increased soil organic carbon content by 3.9%~6.9%, soil total nitrogen content by 17.0%~41.0%, and available potassium content by 13.9%~21.8%. Compared with CK and CF， the soybean yield increased by 9.8%~32.1% under different amendment treatments, and the soybean yield increased the most under CBK treatment. The dominant phylum of soil bacteria was the same as those before improvement, but the richness and diversity of bacteria increased. Compared with the CK and CF controls, the relative abundance of Proteobacteria was increased by 10.6%~16.6% under the application of other modifiers except CNK treatment. The correlation between soil microbial diversity and soil physicochemical property showed that soil pH was positively correlated with soil microbial alpha diversity index, while soil exchange acid content was negatively correlated with alpha diversity index. There was a significant negative correlation between soil available phosphorus content and soil Simpson index. In conclusion, amendments application optimized the physicochemical properties and microbial environment of soybean continuous cropping soil and improved soybean yields. Of which CBK treatment had the best effect. |
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