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Organic and Inorganic Nitrogen forms as Affected by Phosphorus Additions in a Maize–Mustard Cropping System
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-05-11 , DOI: 10.1002/clen.202100240
Yang Zhang 1 , Xiaojia Zhang 1 , Chuan Zhou 2 , Ping Lei 3 , Mahendar Kumar Sootahar 1 , Jiupai Ni 3
Affiliation  

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.

中文翻译:

玉米-芥菜种植系统中磷添加对有机和无机氮形式的影响

磷 (P) 有效性影响土壤氮 (N) 形式的积累和富集。然而,在芥菜-玉米轮作系统中,磷添加对土壤氮形态分布和周转的影响尚不清楚。田间试验研究了在芥菜-玉米轮作系统中添加磷对土壤氮形态转换的影响。结果表明,玉米收获后,与未添加P相比,添加P的土壤中铵态氮含量较低。芥菜采收后,施磷土壤中有机氮的形成比未施磷高。此外,玉米收获后,添加P的土壤中的可水解铵N和未知可水解N均小于未添加P的土壤。结构化方程模型结果显示可水解氨基酸 N 的强度,添加P的土壤中可水解氨基糖N和未知可水解N转化为铵态N的程度大于未添加P的土壤,这些有机N形式转化为硝酸盐N的强度较弱。结果表明,P添加通过改变土壤N形式的周转来影响土壤N的积累和富集。
更新日期:2022-05-11
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