Soil phosphorus transformation characteristics in response to molybdenum supply in leguminous crops

Muhammad Shoaib Rana; Cheng Xiao Hu; Muhammad Shaaban; Muhammad Imran; Javaria Afzal; Mohamed G Moussa; Ali Mohamed Elyamine; Parashuram Bhantana; Muhammad Hamzah Saleem; Muhamad Syaifudin; Muhammad Kamran; Md Ashrafuzzaman Shah; Xuecheng Sun

doi:10.1016/j.jenvman.2020.110610

Soil phosphorus transformation characteristics in response to molybdenum supply in leguminous crops

J Environ Manage. 2020 Aug 15:268:110610. doi: 10.1016/j.jenvman.2020.110610. Epub 2020 May 14.

Affiliations

¹ Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Micro-elements Research Center, College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan, 430070, China.
² Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Micro-elements Research Center, College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address: hucx@mail.hzau.edu.cn.
³ Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan.
⁴ Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, 510642, PR China.
⁵ Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Micro-elements Research Center, College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan, 430070, China; Soil and Water Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Abou Zaabl, 13759, Egypt.
⁶ MOA Key Laboratory of Crop Ecophysiology and Farming in the Middle Reaches of Yangtze River, College of Plant Science and Technilogy, Huazhong Agricultural University, Wuhan, 430070, China.
⁷ Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Micro-elements Research Center, College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
⁸ Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Micro-elements Research Center, College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address: sxccn@mail.hzau.edu.cn.

PMID: 32383643
DOI: 10.1016/j.jenvman.2020.110610

Abstract

Phosphorus (P) is one of the most restrictive essential elements to crop growth and development due to less availability in the soil system. Previous studies have reported the synergistic effects between molybdenum (Mo) and P fertilizer on P uptake in various crops. However, an induced long term effect of Mo on soil P dynamics in the rhizosphere and non-rhizosphere has not been reported yet in leguminous crops. In this study, a long term field experiment was conducted to explore the P transformation characteristics and bioavailability in Mo-deficient (-Mo) and Mo-enriched (+Mo) soil under leguminous (broad bean-soybean) cropping system. The results indicated that long-term Mo application increased the plant dry matter accumulation (14.23%-35.27%, for broad bean; 24.40%-37.46%, for soybean) from March-September. In rhizosphere soil, the percent decrease in pH (8.10%) under +Mo treatment of the soybean crop was recorded more during September as compared to broad bean crop. Under Mo supply, H₂O-Pi fraction increased up to 28.53% and 43.67% while for NaHCO₃-Pi this increase was up to 5.61% and 11.98%, respectively in the rhizosphere soil of broad bean and soybean, whereas, residual-P exhibited the highest proportion of P fractions. Moreover, compared with -Mo, +Mo treatments significantly increased the soil acid phosphatase (broad bean = 17.43 μmol/d/g; soybean = 28.60 μmol/d/g), alkaline phosphatase (broad bean = 3.34 μmol/d/g; soybean 6.35 μmol/d/g) and phytase enzymes activities (broad bean = 2.45 μmol/min/g; soybean = 5.91 μmol/min/g), transcript abundance of phoN/phoC genes and microbial biomass P (MBP) in rhizosphere soil. In crux, the findings of this study suggest that long term Mo application enhanced P bioavailability through increased available P, MBP, P related enzymes activities and their genes expressions which may represent a strategy of Mo to encounter P deficiencies in the soil system.

Keywords: Broad bean; Molybdenum; P enzymes; Phosphorus fractions; Rhizosphere; Soybean.

MeSH terms

Fabaceae*
Molybdenum
Phosphorus
Rhizosphere
Soil Microbiology
Soil*

Substances

Soil
Phosphorus
Molybdenum