| Response of phosphorus components in black loessial soil to long\|term different fertilization treatments |
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| DOI：10.7606/j.issn.1000-7601.2025.05.18 |
| Key Words: black loessial soil inorganic phosphorus component fertilization method long\|term fertilization |
| Author Name | Affiliation | | YE Gengkang | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | E Shengzhe | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Institute of Soil and Fertilizer and Save Water Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YUAN Jinhua | Institute of Soil and Fertilizer and Save Water Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Yuntao | Institute of Soil and Fertilizer and Save Water Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LU Gangbin | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Peng | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Yana | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to scientifically manage soil phosphorus nutrition, the black loessial soil in Jingchuan County, Gansu Province was selected as the research object. The experiment was designed with six treatments, including no fertilization (CK), nitrogen fertilizer alone (N), nitrogen and phosphorus with fertilization (NP), straw plus nitrogen and phosphorus fertilizer (SNP), farmyard manure (M), and farmyard manure plus nitrogen and phosphorus (MNP). The determination of phosphorus component content in black loessial soil by long\|term targeted fertilization was studied, and correlation analysis was conducted. The results showed that， (1) Compared with no fertilization treatment (CK), long\|term application of nitrogen and phosphorus fertilizer (NP), farmyard manure (M), and farmyard manure plus nitrogen and phosphorus fertilizer (MNP) significantly increased soil total phosphorus content, with increases of 212.47 mg·kg-1, 382.39 mg·kg-1, and 600.54 mg·kg-1, respectively. The three treatments of phosphorus fertilizer (NP, SNP, and MNP) and farmyard manure (M) significantly increased soil available phosphorus content compared with the control CK, with increases of 6.70 mg·kg-1, 7.57 mg·kg-1, 42.99 mg·kg-1, and 29.25 mg·kg-1, respectively. Except for the application of nitrogen fertilizer (N) alone, other treatments significantly increased the content of Ca2-P, Ca8-P, Fe-P, and Al-P. Among them, the application of farmyard manure plus nitrogen-phosphorus fertilizer (MNP) increased the most, with increases of 42.80 mg·kg-1, 122.10 mg·kg-1, 28.10 mg·kg-1, 61.70 mg·kg-1, respectively. (2) The correlation analysis results showed that the total phosphorus content had an extremely significant positive correlation with Ca2-P, Ca8-P, Fe-P, and Al-P (P<0.01), with Ca8-P having the highest R2 coefficient and an explanatory power of 88.88%, followed by Ca2-P, Al-P, and Fe-P. The available phosphorus content was extremely significantly positively correlated with Ca2-P, Ca8-P, Fe-P, and Al-P (P<0.01), with Ca2-P having the highest the R2 coefficient and an explanatory power of 97.90%, followed by Ca8-P, Al-P, and Fe-P. In summary, long-term different fertilizer applications had a certain effect on the phosphorus components of the black loessial soil. Except for the single application of nitrogen fertilizer (N), all other treatments could increase the content of the active phosphorus components. For the contents of Ca2-P, Ca8-P, Fe-P, and Al-P, the combination of farmyard manure and nitrogen-phosphorus fertilizer (MNP) had the best effect on increasing the content. For the contents of O-P, the application of farmyard manure (M) had the most significant improvement. The five fertilization treatments all significantly reduced the potential phosphorus source (Ca10-P) content compared to the control (CK). Ca8-P, Ca2-P, Al-P, and Fe-P showed extremely significant positive correlations with the total phosphorus content. Among them, Ca8-P had the highest correlation coefficient with the total phosphorus （R2=0.887）, while Ca2-P, Al-P, Ca8-P, and Fe-P have an extremely significant positive correlation with the available phosphorus content, with Ca2-P having the highest correlation coefficient with the available phosphorus （R2=0.979）. |
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