Effects of organic matter application on microbial biomass and available nutrients in various types of paddy soils

Shibahara, Fujiyoshi; Inubushi, Kazuyuki

doi:10.1080/00380768.1997.10414727

Cited by 46 publications

(30 citation statements)

References 19 publications

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“…Others have indicated that the soil microbial biomass is a more sensitive indicator of soil fertility than soil organic-matter content because it responds readily to changes in soil physical and chemical properties (Shibahara and Inubushi 1997). Our results indicate that microbial biomass C values were significantly affected by soil N contents and organic-matter contents (Figure 3).…”

Section: Discussionsupporting

confidence: 66%

Excessive Nitrogen Inputs in Intensive Greenhouse Cultivation May Influence Soil Microbial Biomass and Community Composition

Hao

Christie

Fang

et al. 2009

Communications in Soil Science and Plant Analysis

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Intensive greenhouse vegetable-production systems commonly utilize excessive fertilizer inputs that are inconsistent with sustainable production and may affect soil quality. Soil samples were collected from 15 commercial greenhouses used for tomato production and from neighboring fields used for wheat cropping to determine the effects of intensive vegetable cultivation on soil microbial biomass and community structure. Soil total nitrogen (N) and organicmatter contents were greater in the intensive greenhouse tomato soils than the open-field wheat soils. Soil microbial carbon (C) contents were greater in the greenhouse soils, and soil microbial biomass N showed a similar trend but with high variation. The two cropping systems were not significantly different. Soil microbial biomass C was significantly correlated with both soil total N and soil organic matter, but the relationships among soil microbial biomass N, soil total N, and organic-matter content were not significant. The Biolog substrate 2323 utilization potential of the soil microbial communities showed that greenhouse soils were significantly higher (by 14%) than wheat soils. Principal component (PC) analysis of soil microbial communities showed that the wheat sites were significantly correlated with PC1, whereas the greenhouse soils were variable. The results indicate that changes in soil microbiological properties may be useful indicators for the evaluation of soil degradation in intensive agricultural systems.

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Section: Discussionsupporting

confidence: 66%

Excessive Nitrogen Inputs in Intensive Greenhouse Cultivation May Influence Soil Microbial Biomass and Community Composition

Hao

Christie

Fang

et al. 2009

Communications in Soil Science and Plant Analysis

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“…After addition of rice straw into the paddy soil, the C/N ratio changed from 18:1 to 24:1, indicating a relative large increase of soil carbon content and C/N ratio (Conrad and Klose 2006). Rice straw increased concentration of available nutrients and microbial biomass (Shibahara and Inubushi 1997). It also increased copies of bacterial and archaeal 16S rRNA in anaerobic slurries of Italian paddy soil (Weber et al 2001;Conrad and Klose 2006), suggesting microorganisms might have been actively involved in the mineralization of rice straw.…”

Section: Introductionmentioning

confidence: 86%

Dynamics of sulfate reduction and sulfate-reducing prokaryotes in anaerobic paddy soil amended with rice straw

Liu

Zheng

et al. 2009

Biol Fertil Soils

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Incorporation of rice straw to soil is a common agricultural practice in rice cultivation. In anaerobic paddy soil, the complete mineralization of organic matter to CH 4 and CO 2 is accomplished by the sequential reduction of nitrate, ferric iron, sulfate, and methanogenesis. In order to estimate the temporal changes of sulfate-reducing prokaryotes (SRP) as decomposers of organic matters, the effects of rice straw amendment on the dynamics of sulfate reduction and SRP were investigated by combining the monitoring of CH 4 , sulfate, and organic acids with molecular tools such as soil DNA extraction, real-time PCR, cloning, sequencing, and phylogenetic analysis. The incorporation of rice straw into paddy soil significantly increased concentrations of sulfate, formate, acetate, propionate, and lactate and CH 4 production. The rate of sulfate reduction in the straw-amended slurries was significantly higher than that in the unamended slurries. The dsrAB gene copy numbers of SRP in the straw-amended soil slurries ranged from 4.26×10 6 to 1.96×10 8 per gram of dry soil, which were significantly higher than those in the unamended control ranging from 1.99×10 6 to 7.90×10 7 per gram of dry soil. Significant correlations were observed between SRP dsrAB gene copy numbers and the concentrations of sulfate and acetate. Cloning and sequencing analyses showed a clear shift of SRP community structure between treatments and time.In the straw-amended slurries, Clostridia-like SRP significantly increased, while Deltaproterobacteria-like SRP (Sytrophobacter, Desulfobacterium, Desulfovibrio, and Desulfomonile) decreased during the incubation period. Novel uncultured SRP were abundant in the straw-amended slurries and changed during the incubation period.

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“…Soil microbial biomass carbon (C MB ): For the study of environmental and anthropogenic influences on living part of soils the determination of C MB is widely used (Pappendick 1991, Shibahara and Inubushi 1997, Filip 2001. Expected high level of biomass was determined in cambisols (average 556 µg/g dry soil, SD 167), while three localities in the mountain area were quite high in biomass (599-625 µg/g dry soil).…”

Section: Resultsmentioning

confidence: 99%

Microbial characteristics, carbon and nitrogen content in cambisols and luvisols

Růžek¹,

Voříšek²,

Strnadová³

et al. 2004

PLANT SOIL ENVIRON

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Tested soils (1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002) were defined by chemical, textural and microbial characteristics. From the tests which describe cambisols, the following parameters have to be stressed. The higher level of C org (1.20-1.76%), which resulted in quite high microbial biomass carbon content (396-625 µg/g dry soil), high control respiration (0.45-0.80 mg CO 2 /h/ 100 g dry soil) and potential nitrification with (NH 4 ) 2 SO 4 (6.7-18.4 mg N-NO 3 /8 days/100 g dry soil). Studied luvisols reached typical levels: C org (0.97-1.22%), C MB (398-503 µg/g dry soil), control respiration (0.46-0.57 mg CO 2 /h/100 g dry soil), potential nitrification with (NH 4 ) 2 SO 4 (3.2-9.9 mg N-NO 3 /8 days/100 g dry soil). Lower levels of organic carbon and a medium level of microbial biomass raised in higher ratio C MB /C org (average 4.0%). Highly significant differences (p < 0.01) between cambisols and luvisols were determined for C org , N t , pH(KCl), C MB , C MB /C org , C E , control respiration and potential nitrification, while the difference in potential ammonification with peptone was at level p < 0.05. With the exemption of ratio C MB /C org all cambisol characteristics were higher than luvisol ones. Studied soils were evaluated by six biological criteria (C MB ; ratios: C MB /C org , C E /C MB , potential/control respiration, potential/ control ammonification, potential/control nitrification). These criteria distinguished tested soils into three groups. The first one includes two localities in the mountain region (Červená Voda 809, 810; altitude 565-590 m) defined as stagnic cambisols with higher content of C org (1.40, respective 1.76%) and simultaneously with the highest biomass of micro-organisms from all tested soils (C MB , 625, respective 621 µg/g dry soil). It is not surprising that microbial activities (respiration, nitrification) at these localities were also high. The majority of the studied localities (one eutric cambisol and four luvisols) belongs to the medium group. The third group includes two localities (Neumětely -haplic luvisol, Čistá u Rakovníka -eutric cambisol) where biological criteria was mostly the worst. In the period 1993-2002 microbial biomass carbon was for both sites in the range of 357-458 µg/g dry soil which are not so bad values, but in comparison with localities in mountain wet region they are low. This status was issued in the lower ratio C MB /C org (2.71-3.77%).

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Effects of organic matter application on microbial biomass and available nutrients in various types of paddy soils

Cited by 46 publications

References 19 publications

Excessive Nitrogen Inputs in Intensive Greenhouse Cultivation May Influence Soil Microbial Biomass and Community Composition

Excessive Nitrogen Inputs in Intensive Greenhouse Cultivation May Influence Soil Microbial Biomass and Community Composition

Dynamics of sulfate reduction and sulfate-reducing prokaryotes in anaerobic paddy soil amended with rice straw

Microbial characteristics, carbon and nitrogen content in cambisols and luvisols

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