| Effects of different mulching and tillage practices on soil nutrient temporal and spatial characteristics and crop yield of sloping farmland in black soil areas |
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| DOI：10.7606/j.issn.1000-7601.2024.04.20 |
| Key Words: sloping farmland maize and soybean rotation mulching soil nutrient crop yield |
| Author Name | Affiliation | | LIU Jilong | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | DONG Ze | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | CAO Xiaoqiang | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | WANG Zhizhuo | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | LIU Qianqian | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | CAO Ran | School of Water and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources of the Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China |
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| Abstract: |
| To investigate the spatiotemporal variation characteristics of soil nutrients and the mechanism of crop yield in maize and soybean rotation farmland of sloping farmland in black soil areas under different covering and tillage measures, field experiments were conducted from 2022 to 2023. Four treatments of uniform covering of broken stems along the slope （SM）， uniform covering of broken stems across the slope （CM）, covering crops along the slope （SC）， and traditional tillage （CK）were set up to explore the trend of changes in soil nutrient content with growth period and soil depth under different cover and tillage measures, the changes in crop yield， and the correlation between soil nitrate nitrogen （NO-3-N）, ammonium nitrogen （NH+4-N）， available phosphorus （AP）， and available potassium （AK） contents and crop yield under different cover and tillage measures. The results showed that soil AP content in each treatment showed a trend of first increasing and then decreasing with the advancement of crop growth period while the soil AK content showed a gradually decreasing trend with the advancement of crop growth period. The NH+4-N， NO-3-N， AP and AK contents of each treatment showed a gradually decreasing trend as the soil depth deepened. The dry mass and yield of each treatment were significantly improved by 3.29%~11.96% and 4.29%~14.77%， respectively compared to the CK treatment. Except for the NH+4-N content in the 0~20 cm and 20~40 cm soil layers in 2022， the nutrient contents in all other soil layers showed a significant positive correlation with crop yield （P<0.05）， the influence of soil AK content on crop yield was higher. |
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