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| Effects of dairy cattle slurry and chemical fertilizer on the soil phosphorus balance of spring maize fields in northeast China |
| Received:April 21, 2022 Revised:July 13, 2022 |
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| KeyWord:dairy cattle slurry;soil phosphorus deficit;Olsen-P;CaCl2-P;maize |
| Author Name | Affiliation | E-mail | | JIANG Baiwen | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LIU Lihong | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LIU Junhui | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | YU Shiyuan | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LIANG Yuan | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | SHEN Haifeng | Beijing Danqingnuohe Technology Co., Ltd., Beijing 100193, China | | | SHAO Hui | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | shaohuineau@neau.edu.cn |
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| Abstract: |
| To investigate the effects of dairy cattle slurry combined with chemical fertilizer on maize yield, plant nutrient uptake, soil phosphorus leaching, and phosphorus loss, six treatments were set up under the following field conditions： N 200 kg·hm-2, P2O5 100 kg· hm-2, and K2O 80 kg·hm-2 were the total nutrient input, including no fertilizer（CK） , conventional fertilizer application（F） , and combined fertilizer and dairy cattle slurry applications of 30, 60, 90 t·hm-2, and 120 t·hm-（ 2 hereinafter abbreviated as FL30, FL60, FL90, FL120） , according to the different amounts of cattle slurry. Results showed that compared with F treatment, the maize yield under the FL120 treatment was the highest, reaching 14.72 t · hm-2, with an increase of 32.14%. The soil phosphorus accumulation under the FL120 treatment was the highest, reaching 129.40 kg·hm-2, indicating that a high proportion of dairy cattle slurry application could improve crop yield and soil available phosphorus content. The phosphorus content and phosphorus accumulation of corn treated with FL60 were the highest, indicating that the combination of dairy cattle slurry and chemical fertilizer could promote the absorption of phosphorus and improve the nutrient utilization efficiency of crops. According to the relationship between soil Olsen-P and CaCl2-P, the critical value of soil phosphorus leaching was 48.99 mg · kg-1, and the content of Olsen-P in the FL90 and FL120 soil exceeded the critical value of phosphorus leaching, indicating that a large amount of dairy cattle slurry would aggravate phosphorus leaching; this would result in phosphorus loss and potential environmental harm. Therefore, when combining dairy cattle slurry with chemical fertilizer, the recommended amount of cattle slurry should be controlled within 90 t·hm-2. |
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