Long-Term Mineral Fertilization Improved the Grain Yield and Phosphorus Use Efficiency by Changing Soil P Fractions in Ferralic Cambisol
文献类型: 外文期刊
作者: Ahmed, Waqas 1 ; Liu, Kailou 3 ; Qaswar, Muhammad 1 ; Huang, Jing 1 ; Huang, Qinghai 3 ; Xu, Yongmei 7 ; Ali, Sehrish 1 ; Mehmood, Sajid 8 ; Ammar Asghar, Rana Muhammad 9 ; Mahmood, Mohsin 9 ; Zhang, Huimin 1 ;
作者机构: 1.Chinese Acad Agr Sci, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
3.Natl Engn & Technol Res Ctr Red Soil Improvement, Nanchang 331717, Jiangxi, Peoples R China
4.Jiangxi Inst Red Soil, Nanchang 331717, Jiangxi, Peoples R China
5.Chinese Acad Agr Sci, Natl Observat Stn Qiyang Agriecol Syst, Qiyang 426182, Peoples R China
6.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Qiyang 426182, Peoples R China
7.Xinjiang Acad Agr Sci, Inst Soil Fertilizer & Agr Water Conservat, Urumqi 830091, Peoples R China
8.Guangzhou Univ, Sch Environm Sci & Engn, Key Guangdong Prov Key Lab Radionuclides Pollut C, Guangzhou 510006, Peoples R China
9.Northwest A&F Univ, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agri Environm Northwest Chin, Minist Agr, Yangling 712100, Shaanxi, Peoples R China
10.Henan Univ Sci & Technol, Coll Agr, Luoyang 471000, Peoples R China
关键词: P fractions; grain yield; P use efficiency; SEM pathways; mineral fertilization
期刊名称:AGRONOMY-BASEL ( 影响因子:3.417; 五年影响因子:3.64 )
ISSN:
年卷期: 2019 年 9 卷 12 期
页码:
收录情况: SCI
摘要: Elevated mineral fertilization may change the composition and increase the availability of soil phosphorus (P) in subtropical paddy soils and thus affect long-term plant growth. However, an understanding of the response of soil P fractions to long-term nitrogen, phosphorus and potassium (NPK) additions remains elusive. This study aimed to explore the responses of soil P-fractions and their mobility to different long-term chemical fertilization rates under a double rice cropping system. The rates of nitrogen (N), phosphorus (P), and potassium (K) in the low NPK treatment (LNPK) were 90, 45, and 75 kg ha(-1) year(-1), respectively, and in the high NPK treatment (HNPK), they were 180, 90, and 150 kg ha(-1) year(-1), respectively. The results showed that the concentrations of soil organic matter (SOM), total P, Olsen P, total N, and mineral N were remarkably increased under HNPK by 17.46%, 162.66%, 721.16%, 104.42%, and 414.46%, respectively, compared with those under control (CT). Compared to the CT P fractions, HNPK increased the labile P fractions (i.e., NaHCO3-Pi and NaHCO3-Po) by 322.25% and 83.53% and the moderately labile P fractions (i.e., NaOH-Pi, NaOH-Po and HCl. dil. Pi) by 163.54%, 183.78%, and 3167.25% respectively, while the non-labile P was decreased by the HNPK addition. P uptake and grain yield were increased by LNPK and HNPK by 10.02% and 35.20%, respectively, compared with CT. P use efficiency indices were also higher under HNPK than under LNPK. There was a strong positive relationship between grain yield and P use efficiency (R-2 = 0.97). A redundancy analysis (RDA) showed a strong correlation between soil chemical properties and the labile and moderately labile P pools. Structural equation modeling (SEM) revealed that SOM, mineral N, and available P strongly control the labile P pool. In conclusion, NPK additions under the paddy soils significantly influences the soil P fractions. The soil P dynamics and the mechanisms governing the interactions between plants and soil nutrients are clearly explained in this study.
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