Pedosphere (3): 504--515, 2025
ISSN 1002-0160/CN 32-1315/P
©2025 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Exogenous application of artificial humic substance can improve black soil properties and rice yield |
Yue YUAN1,2,4, Qingyu LIU1,2, Shun ZHANG1,2, Zhuqing LIU1,2 , Xi ZHANG1,2, Kui CHENG2,3, Fan YANG1,2 |
1 School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030 (China);
2 International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, Harbin 150030 (China);
3 College of Engineering, Northeast Agricultural University, Harbin 150030 (China);
4 School of Surveying and Planning, Shangqiu Normal University, Shangqiu 476000 (China) |
| ABSTRACT |
| Rice yield in the black soil region of Northeast China has been declining due to severe soil fertility degradation caused by both biotic and abiotic factors. Artificial humic substance (A-HS) has attracted much attention due to its high cost-effectiveness and great potential to improve soil fertility. However, the specific effects of A-HS on nutrient contents in rice nursery soils remain unclear. This study systematically investigated the effects of rational application of A-HS on soil nutrient turnover and yield and analyzed the changes in soil nutrients and microbial communities at Qianfeng Farm, Northeast China. The results indicated that the application of A-HS significantly increased soil dissolved organic matter and nutrient contents in the native and seedling soils. In addition, the root growth and yield of the seedlings at maturity were effectively promoted. More interestingly, the application of A-HS significantly altered plant growth-promoting rhizobacteria, such as Noviherbaspirillum, Klebsiella, and Pedobacter, improving natural barrier formation and soil nutrient conversion. It could be concluded that A-HS significantly enhanced crop nutrient uptake and accumulation by altering soil bacterial communities. In general, the application of A-HS could be profitable and sustainable in rice production. The current study from multiple aspects provides valuable insights into the benefits of A-HS in promoting crop growth and development, which could have important implications for agriculture and food security. |
| Key Words: fluorescence intensity|microbial community|physicochemical property|plant growth-promoting rhizobacteria|rice seedling |
| Citation: Yuan Y, Liu Q Y, Zhang S, Liu Z Q, Zhang X, Cheng K, Yang F. 2025. Exogenous application of artificial humic substance can improve black soil properties and rice yield. Pedosphere. 35(3): 504-515. |
|
View Full Text
|
|
|
|
