Organic and Inorganic Nitrogen forms as Affected by Phosphorus Additions in a Maize–Mustard Cropping System. Issue 7 (17th May 2022)

• Record Type: Journal Article
• Authors: Zhang, Yang; Zhang, Xiaojia; Zhou, Chuan; Lei, Ping; Sootahar, Mahendar Kumar; Ni, Jiupai
• Is Part Of: Clean. Volume 50:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-17
• Subjects: mustard–maize rotation -- nitrogen forms -- nitrogen turnover -- phosphorus addition -- structural equation modeling; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.202100240
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract: Phosphorus (P) availability affects the accumulation and enrichment of soil nitrogen (N) forms. However, the effect of P addition on the distribution and turnover of soil N forms in the mustard–maize rotation system is unclear. A field experiment is conducted to investigate the effect of P addition on the turnover of soil N forms in a mustard–maize rotation system. The results show that after maize harvesting, the levels of ammonium N in soil with P addition are smaller compared to those without P addition. The organic N forms in soil with P addition are greater compared without P addition after mustard harvest. Moreover, the hydrolysable ammonium N and unknown hydrolysable N in soil with P addition are smaller than those without P addition after maize harvest. Structured equation model results show the intensities of hydrolysable amino acid N, hydrolysable amino sugar N, and unknown hydrolysable N transformed into ammonium N in soil with P addition are greater than those without P addition, and the intensities of these organic N forms transformed into nitrate N are weaker. The results indicate that P addition affect the accumulation and enrichment of soil N by altering the turnover of soil N forms. Abstract : The turnover of soil nitrogen forms is an important component of the geochemical cycle, which is of great significance to the global ecology. The effect of phosphorus addition on the turnover between soil organic nitrogen forms and inorganic nitrogen forms are analyzed. Field experimental results indicate that phosphorus addition promotes the mineralization of organic nitrogen and the turnover among organic nitrogen forms.