Struvite as P Fertilizer on Yield, Nutrient Uptake and Soil Nutrient Status in the Rice-Wheat Rotation System: A Two-Year Field Observation
文献类型： 外文期刊
作者： Wang, Jizheng 1 ; Xue, Lihong 1 ; Hou, Pengfu 1 ; Hao, Tianjia 1 ; Xue, Lixiang 2 ; Zhang, Xi 2 ; Sun, Tianyi 1 ; Lobanov, Sergey 3 ; Yang, Linzhang 2 ;
作者机构： 1.Nanjing Agr Univ, Nanjing 210095, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Zhongling St 50, Nanjing 210014, Peoples R China
3.Shanghai Phosmag Environm Technol Co Ltd, Shanghai 200438, Peoples R China
关键词： struvite; P reduction; grain yield; nutrient use efficiency; P apparent balance; rice-wheat rotation
期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN：
年卷期： 2023 年 13 卷 12 期
页码：
收录情况： SCI
摘要： Long-term large inputs of phosphorus (P) fertilizer in China have caused serious soil P accumulation, low P use efficiency (PUE) and high risk of P loss. Controlling the amount of P fertilizer applied presents an inevitable choice for improving the PUE. Struvite recycled from agricultural wastewater rich in N and P concentrations are capable of slow nutrient release, improving nutrient uptake and enabling the reuse of nutrients from environmental sources when applied to agricultural land. A two-year field experiment was conducted to investigate the effects of struvite combined with P reduction under a rice-wheat rotation system in eastern China. A total of five treatments were set up, including conventional fertilization (FP), a struvite substitution of 100% P fertilizer (SP), a 50% P reduction with struvite substitution (RSP), no application of N fertilizer (N0) and no application of P fertilizer (P0). Grain yield, crop N and P uptake, N and P use efficiency (NUE and PUE) and soil nutrient status were assessed. Under the same P application rate, the yield and aboveground biomass of the SP treatment were slightly higher than those of FP treatment, but the crop P uptake, PUE and soil available P content were significantly increased. The RSP treatment did not reduce yield with 50% P reduction, and significantly improved the PUE and soil available P content. Crop N uptake and NUE were also found to be increased in SP and RSP treatments with struvite substitution. The P apparent balance showed that both the SP and FP treatments had a P surplus, but the RSP treatment had a P break-even, and the soil available P content remains stable compared with the initial value. The results indicate that struvite application could improve the soil P availability and crop nutrient uptake then promote the crop yield. To increase the nutrient use efficiency of crops while ensuring crop yield and soil fertility, appropriate P reduction combined with struvite as a P fertilizer could be sustainable in the rice-wheat rotation system in the long run.
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