Dynamic changes in soil chemical properties and microbial community structure in response to different nitrogen fertilizers in an acidified celery soil

Abstract

To determine the effects of different kinds of nitrogen fertilizer, especially high-efficiency slowrelease fertilizers, on soil pH, nitrogen (N) and microbial community structures in an acidic celery soil, four treatments (CK, no N fertilizer; NR, urea; PE, calcium cyanamide fertilizer; and SK, controlled-release N fertilizer) were applied, and soil pH, total soil N, inorganic N, and soil microbial biomass C were analyzed. Phospholipid fatty acids (PLFAs) were extracted and detected using the MIDI Sherlock microbial identification system. The PE treatment significantly improved soil pH, from 4.80 to >6.00, during the whole growth period of the celery, and resulted in the highest celery yield among the four treatments. After 14 d application of calcium cyanamide, the soil nitrate content significantly decreased, but the ammonium content significantly increased. The PE treatment also significantly increased soil microbial biomass C during the whole celery growth period. Canonical variate analysis of the PLFA data indicated that the soil microbial community structure in the CK treatment was significantly different from those in the N applied treatments after 49 d fertilization. However, there was a significant difference (P < 0.05) in soil microbial community structure between the PE treatment and the other three treatments at the end of the experiment. Calcium cyanamide is a good choice for farmers to use on acidic celery land because it supplies sufficient N, and increases soil pH, microbial biomass and the yield of celery.

Effects of integrated biocontrol on bacterial wilt and rhizosphere bacterial community of tobacco

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Wheat-root associated prokaryotic community: interplay between plant selection and location

“…Soil is a main seed bank for root-associated microbial communities. It determines initial microbial inoculants, and also shapes microbial community compositions through physical and chemical properties, including soil particle size distribution, soil pH, nutrient profiles and moisture (Li et al 2014;Shi et al 2019;Wagner et al 2016;Wu et al 2019b;Zheng and Gong 2019). Climatic factors affect microbiota through regulating the metabolic activities of microorganisms (Crowther et al 2019).…”

An optimal combined slow-release nitrogen fertilizer and urea can enhance the decomposition rate of straw and the yield of maize by improving soil bacterial community and structure under full straw returning system

“…Deep application of slow-release fertilizer improved the structure, distribution, and diversity of the microbial community in the rice rhizosphere compared with broadcasting (Chen et al, 2022). Wu et al (2019) found that slow-release fertilizer application did not significantly alter the structure of the microbial community in acidic soil compared with conventional fertilization. The conclusions regarding the impact of slow-release fertilizer on the soil bacterial community are not unified, possibly due to various factors such as soil texture, physical and chemical properties, geographical location, and agricultural management methods.…”