| Effects of different organic materials returning on crop yield and phosphorus composition in irrigated desert soil |
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| DOI：10.7606/j.issn.1000-7601.2025.01.10 |
| Key Words: organic materials phosphorus component wheat\|maize rotation long term positioning test irrigated desert soil |
| 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 | | ZHAO Tianxin | College of Resources and Environment, Gansu Agricultural University, 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: |
| A long\|term positioning experiment was carried out in Zhangye City, Gansu Province from 2011 to 2022. A total of 8 treatments were set up: no fertilizer control (CK), conventional fertilizer application (NP), 70% conventional fertilizer application + cow manure (NF), 70% conventional fertilizer application + biogas residue (ZZ), 70% conventional fertilizer application + sludge (WN), 70% conventional fertilizer application + chicken manure (JF), 70% conventional fertilizer application + bacterial residue (JZ) and 70% conventional fertilizer application + pig manure (ZF). The effects of six types of organic materials, used as substitutes for 30% of the fertilizer, on crop yield and soil phosphorus composition were investigated. This study aims to provide a scientific basis for improving phosphorus utilization efficiency through the combined application of fertilizers and organic materials. The results showed that the grain yield of WN, JF and ZF treatment increased by 7.0%~9.4% compared with that of the NP treatment. The yield of corn treated with NF, ZZ, WN, JF, and ZF increased by 4.4% to 6.5% compared to that treated with NP.The addition of organic materials significantly affected total phosphorus, available phosphorus, inorganic phosphorus components and the proportion of available phosphorus and inorganic phosphorus components in total phosphorus. Except biogas residue, the total phosphorus of the other 5 organic materials was increased by 8.6%~96.5% compared with that of the NP treatment. Compared with the NP treatment, the content of available phosphorus and its proportion in total phosphorus increased by 107.6%~480.1% and 78.9%~226.3%, respectively, among which ZF and JF had the highest increase. The ZF treatment exhibited the highest Ca2-P, showing an increase of 1 144.9% compared to the NP treatment. Additionally, the proportion of Ca2-P in the organic material treatments increased by 60% to 568% relative to the NP treatment. Compared with the NP treatment, the content of Ca8-P in soil treated with ZF and JF increased by 207.6% and 199.1%, respectively. The proportion of Ca8-P in JF, JZ and ZF treatment increased by 29.7%~60.9% compared with the NP treatment. The proportion of Al-P in the NF, WN, JF and ZF treatments increased by 30.8%~123.1% compared with the NP treatment. The proportion of Fe-P in the WN treatment increased by 83.6% compared with the NP treatment. In summary, the combined application of organic materials and fertilizer achieved the purpose of reducing fertilizer application and increasing crop yield, and increased the contents of total phosphorus, available phosphorus, Ca2-P, Ca8-P, Al-P and Fe-P in soil. |
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