N-enriched biochar increases carbon, nitrogen, and phosphorus accumulation associated with changes in plant ecological stoichiometry in subtropical rice paddy fields

IF 1.6 4区农林科学 Q1 Agricultural and Biological Sciences

Experimental Agriculture Pub Date : 2023-07-05 DOI:10.1017/S001447972300008X

Jie Hei, Xiaolei Yin, Weiqi Wang, J. Sardans, Chun Wang, Xiaoxuan Chen, A. Tariq, F. Zeng, A. Alrefaei, J. Peñuelas

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引用次数: 1

Abstract

Summary N-enriched biochar can increase the accumulation of carbon (C), nitrogen (N), phosphorus (P), and biomass in rice plants. On the other hand, the biomass and C, N, and P contents of plant organs are important indicators to reflect plant C, N, and P storages. We established control, 4 t ha−1, and 8 t ha−1 N-enriched biochar treatment plots in a subtropical paddy field in China to investigate the effect of these treatments on C, N, and P storages, ecological stoichiometry in various rice plant organs, and their relationships with edaphic factors. The application of N-enriched biochar increased the biomass and storages of C, N, and P in rice roots, stems, leaves, and grains, mainly at 4 t ha−1. The application of N-enriched biochar decreased the C/N and C/P ratios of rice organs, but increased their N/P ratio. Changes in C/N were mainly due to the changes in storage, while N/P was positively correlated with N storage of stems, leaves, and grains and negatively correlated with P storage in roots. Pearson’s correlation analysis revealed that pH was negatively correlated, and soil N content was positively correlated with P storage in various organs of rice. In addition, soil P content and chlorophyll were positively correlated with N storage. In conclusion, we found that the application of N-enriched biochar improved plant N and P storage and stoichiometrical relations among rice organs.

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富含氮的生物炭增加了亚热带稻田中碳、氮和磷的积累，这与植物生态化学计量的变化有关

富氮生物炭能增加水稻植株碳(C)、氮(N)、磷(P)和生物量的积累。另一方面，生物量和植物各器官C、N、P含量是反映植物C、N、P储量的重要指标。在中国亚热带水田建立对照、4 t ha - 1和8 t ha - 1富氮生物炭处理小区，研究不同处理对水稻各器官碳、氮、磷储量、生态化学计量的影响及其与土壤因子的关系。施用富氮生物炭增加了水稻根、茎、叶和籽粒的生物量和碳、氮、磷储量，主要在4 t ha−1时增加。施用富氮生物炭降低了水稻各器官的碳氮比和碳磷比，但提高了各器官的氮磷比。C/N的变化主要是由于储量的变化，而N/P与茎、叶和籽粒的氮储量呈正相关，与根系的磷储量呈负相关。Pearson相关分析显示，土壤pH与水稻各器官磷储量呈负相关，土壤N含量与水稻各器官磷储量呈正相关。此外，土壤磷含量和叶绿素含量与氮储量呈正相关。综上所述，施用富氮生物炭改善了水稻植株氮磷储量及各器官间的化学计量关系。

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来源期刊

Experimental Agriculture 农林科学-农艺学

CiteScore

2.50

自引率

6.20%

发文量

审稿时长

24 months

期刊介绍： With a focus on the tropical and sub-tropical regions of the world, Experimental Agriculture publishes the results of original research on field, plantation and herbage crops grown for food or feed, or for industrial purposes, and on farming systems, including livestock and people. It reports experimental work designed to explain how crops respond to the environment in biological and physical terms, and on the social and economic issues that may influence the uptake of the results of research by policy makers and farmers, including the role of institutions and partnerships in delivering impact. The journal also publishes accounts and critical discussions of new quantitative and qualitative methods in agricultural and ecosystems research, and of contemporary issues arising in countries where agricultural production needs to develop rapidly. There is a regular book review section and occasional, often invited, reviews of research.