N Fertilization Dependent Bacterial and Archaeal Changes in Paddy Soil View Full Text


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Chapter Info

DATE

2021-03-16

AUTHORS

Sakthivel Ambreetha , Kalyanasundaram Geetha Thanuja , Subburamu Karthikeyan , Dananjeyan Balachandar

ABSTRACT

Paddy ecosystem naturally serves as a micro-habitat for diversified soil microbiome and its oxic-anoxic interface is the hub of multiple bio-geochemical cycles. However, in the Anthropocene era, paddy fields are not exempted from vigorous human interventions. On one hand the cropping of short duration high yielding varieties requiring high nutrient inputs and the other specifically, the heavy dosage of nitrogen inputs often extremely higher than the recommended dose. Furthermore, the inefficient agricultural practices lead to loss of applied N through volatilization, leaching, and low nitrogen use efficiency. In all the cases, imbalance in N level instantly alters the diversity of N-dependent bacterial and archaeal populations. Asia contributes to 90% of global rice production and many of its agricultural lands are constantly occupied with year-round paddy crops for decades. In such areas, prolonged imbalance in N might have a serious impact on soil microbiome subsequently collapsing the natural N transformations in the paddy ecosystem. The abundance of N transforming microbes such as nitrogen-fixing bacteria, ammonia-oxidizing bacteria/archaea, nitrite oxidizers, nitrate oxidizers, denitrifying bacteria, and anaerobic ammonia oxidizers are the key players in sustainable paddy cultivation. Planning a balanced N fertilization certainly helps in proper maintenance of soil health to ensure persistent crop production and sustainability. Hence, a detailed understanding of the adverse impact of higher and sub-optimal dosage of N fertilizers on paddy microbiome is critical. This chapter details the importance of microbial-mediated N transformations in paddy ecosystem followed by the impact of imbalanced N fertilization over soil microbial abundance and the soil health thereof. More... »

PAGES

63-86

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-030-51886-8_3

DOI

http://dx.doi.org/10.1007/978-3-030-51886-8_3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1136418401


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