Long-term fertiliser (organic and inorganic) input effects on soil microbiological characteristics in hydromorphic paddy soils in China

Soil Research ◽  
2019 ◽  
Vol 57 (5) ◽  
pp. 459
Author(s):  
Yiren Liu ◽  
Hongqian Hou ◽  
Jianhua Ji ◽  
Zhenzhen Lv ◽  
Xiumei Liu ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Agricultural Science ◽  
Paddy Soils ◽  
Community Diversity ◽  
Soil Microbial ◽  
Microbiological Characteristics ◽  
Inorganic Fertiliser

This study investigated long-term fertilisation effects on soil microbiological characteristics of hydromorphic paddy soils. The study was conducted in 30-year-old experimental plots with various treatments involving chemical fertiliser (nitrogen, phosphorus, and potassium) alone or in combination with manure in relation to a control in a rice–rice–fallow system at the farm at Jiangxi Academy of Agricultural Science. The soil microbial biomass carbon (SMBC) and nitrogen (SMBN), microbial enzyme activity, and microbial community structure were analysed. Changes in levels of SMBC and SMBN in response to combinations of organic–inorganic fertilisers were significantly higher than for inorganic fertiliser treatment. Furthermore, activities of microbial enzymes (sucrase, urease, proteinase, acid phosphatase, and catalase) were significantly higher in combined than in inorganic fertiliser and control treatments. Additionally, the richness and evenness of soil bacteria were decreased by long-term fertilisation, especially inorganic, whereas the Shannon–Weiner and richness indexes of soil fungi were higher. Long-term fertilisation with high doses of combined organic–inorganic input significantly increased microbial biomass, enzyme activity, and fungal community diversity. However, the same input decreased bacterial community diversity. This study will be useful for improving fertilisation management in hydromorphic paddy soils.

scholarly journals Comparative analysis of certain soil microbiological characteristics of the carbon cycle

2016 ◽  
pp. 137-141
Author(s):  
Bence Mátyás ◽  
Judit Horváth ◽  
János Kátai
Keyword(s):  
Microbial Biomass ◽  
Soil Respiration ◽  
Carbon Cycle ◽  
Microbial Biomass Carbon ◽  
Co2 Production ◽  
Biomass Carbon ◽  
Soil Microbial ◽  
Microbiological Characteristics ◽  
Long Term Experiment

In our researches, we examine the soil microbial parameters related to the carbon cycle. In this study, we compare the changes of microbial biomass carbon (MBC) and the soil CO2 production in soil samples which were taken in spring and autumn. The 30 years old long-term experiment of Debrecen-Látókép is continued in our experiments. The long-term fertilization experiment was set in 1983, and our sample was taken in spring 2014. The examinations of soil respiration processes and factors that influence soil respiration are required in optimal management. In our study, we interested to know how the growing levels of fertilization influence the soil respiration and microbial biomass carbon under non-irrigated and irrigated conditions in maize mono, bi, and triculture.

scholarly journals Soil Microbial Biomass Carbon under Rhizosphere and Non- Rhizosphere of Maize after a Long-Term Nitrogen Fertilization and Tillage Systems

2013 ◽  
Vol 16 (1) ◽  
pp. 63-68
Author(s):  
. Dermiyati ◽  
Eva Firdaus ◽  
Muhajir Utomo ◽  
Mas Achmad Syamsul Arif ◽  
Sutopo Ghani Nugroho
Keyword(s):  
Microbial Biomass ◽  
Nitrogen Fertilizer ◽  
Soil Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Maize Plant ◽  
Biomass Carbon ◽  
Tillage Systems ◽  
Soil Microbial ◽  
Soil Microbial Biomass Carbon

This research aimed to study the soil microbial biomass carbon (SMBC) under maize plant after a long-term application of nitrogen fertilizer and tillage systems (at the 37th growing season). The treatments were arranged in a factorial (3x3) in a randomized completely block design with 3 replications. The first factor was tillage systems, namely intensive tillage (IT) system, minimum tillage (MT) system, and no tillage (NT) system, and the second factor was the long-term application of nitrogen fertilizer, namely 0, 100, and 200 kg N ha-1. Data were analyzed using an orthogonal contrast test and a correlation test between SMBC and organic-C, total-N, and pH of the soil. The results showed that, in the rhizosphere and non-rhizosphere of maize plant, MT system increased the SMBC compared to NT and IT systems. However, application of long-term application of nitrogen fertilizer did not increase the SMBC. Nevertheless, fertilizer application of 100 kg N ha-1 increased the SMBC compare to 200 kg N ha-1.Furthermore, the combination of MT system and 100 kg N ha-1 could increase the SMBC compared to the other combined treatment between tillage systems and N fertilization doses. The SMBC was higher in the rhizosphere than in non-rhizosphere of maize plant.Keywords: Non-rhizosphere, rhizosphere, soil microbial biomass carbon, tillage systems

scholarly journals Soil microbial dynamics and enzyme activities as influenced by biofertilizers and split application of vermicompost in rhizosphere of wheat (Triticum aestivum. L.)

2021 ◽  
Vol 42 (5) ◽  
pp. 1370-1378
Author(s):  
S. Aechra ◽  
◽  
R.H. Meena ◽  
S.C. Meena ◽  
S.L. Mundra ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Microbial Population ◽  
Microbial Biomass Carbon ◽  
Biological Properties ◽  
Biomass Carbon ◽  
Split Application ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Phosphatase Enzyme

Aim: A field experiment was conducted during rabi season to determine the effect of biofertilizers and split application of vermicompost on biological properties (microbial biomass carbon and nitrogen, microbial populations and enzyme activities) in rhizosphere of wheat. Methodology: The experiment was laid out in factorial randomized block design with three replications consisting of twenty treatment combinations. Soil samples were collected from the plots at 0-15 cm depth after harvest of wheat crop and soil biological properties analyzed using standard analytical procedure. Results: The experiment results indicated that among biofertilizers treatments, seed inoculation with Azotobacter + PSB + KMB + ZnSB (B5) resulted in a significant higher soil microbial biomass carbon, microbial biomass nitrogen, population of bacteria, fungi and actinomycetes, dehydrogenase activity and acid phosphatase enzyme activity in comparison to control. Similarly, application of vermicompost as 50 % VC at sowing + 50 % VC at tillering (V3) were obtained improved microbial biomass carbon and nitrogen, microbial population, dehydrogenase activity and acid phosphatase enzyme activity while remaining at par with 75 % VC at sowing + 25 % VC at tillering (V4) proved superior in comparison to rest of the treatments due to continuous supply of nutrients throughout the crop cycle. Grain and straw yield of wheat also increased due to the application of biofertilizers and vermicompost over the control. Interpretation: Biofertilizers (Azotobacter, PSB, KMB and ZnSB) and split application of vermicompost enhanced the soil microbial population and enzymatic activities which sustained the soil health for better wheat production.

scholarly journals The Contribution of Microorganisms to Soil Organic Carbon Accumulation under Fertilization Varies among Aggregate Size Classes

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2126
Author(s):  
Jinjing Lu ◽  
Shengping Li ◽  
Guopeng Liang ◽  
Xueping Wu ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Aggregate Size ◽  
Carbon Accumulation ◽  
Community Diversity ◽  
C Storage ◽  
Soil Aggregate Fractions

Long-term fertilization alters soil microbiological properties and then affects the soil organic carbon (SOC) pool. However, the interrelations of SOC with biological drivers and their relative importance are rarely analyzed quantitatively at aggregate scale. We investigated the contribution of soil microbial biomass, diversity, and enzyme activity to C pool in soil aggregate fractions (>5 mm, 2–5 mm, 1–2 mm, 0.25–1 mm, and <0.25 mm) at topsoil (0–15 cm) from a 27-year long-term fertilization regime. Compared to CK (no fertilization management), NP (inorganic fertilization alone) decreased all of the microbial groups’ biomass, while NPS and NPM (inorganic fertilization plus the incorporation of maize straw or composted cow manure) significantly reduced this negative effect of NP on microbial biomass and increased the microbial contribution to C pool. The results show that microbial variables were significantly correlated with SOC content in >0.25 mm aggregates rather than in <0.25 mm aggregates. Fungal variables (fungal, AM biomass, and F/B ratio) and enzyme activities (BXYL and LAP) in >0.25 mm aggregates explained 21% and 2% of C, respectively. Overall, organic matter addition could contribute to higher C storage by boosting fungal community and enzyme activity rather than by changing microbial community diversity in macro-aggregates.

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