The effects on N2 fixation (C2H2 reduction), bacterial population and rice plant growth of two modes of straw application to a wetland rice field

Ladha, J. K.; Tirol‐Padre, Agnes; Daroy, M. L. G.; Punzalan, Gloria C.; Watanabe, Iwao

doi:10.1007/bf00257643

Cited by 20 publications

(12 citation statements)

References 17 publications

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“…The curve suggests that organic matter of rice straw consisted of at least two components, one rapidly decomposable (half-life, 17 days) and the other slowly decomposable (half-life, 58 days). BNF during the straw decomposition seems to be related to the rapidly decomposable component as reported by YONEY AMA et aL (1977) andLADHA et aL (1987). In the following experiments glucose and cellulose were supplied to soil as representative substances in straw.…”

Section: Exp 1: Decomposition Rate Of Rice Straw In Paddy Soilsupporting

confidence: 60%

Effect of application of glucose, cellulose, and rice straw on nitrogen fixation (acetylene reduction and soil-nitrogen components) in anaerobic soil

Adachi¹,

Watanabe

Kobayashi

et al. 1989

Soil Science and Plant Nutrition

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Section: Exp 1: Decomposition Rate Of Rice Straw In Paddy Soilsupporting

confidence: 60%

Effect of application of glucose, cellulose, and rice straw on nitrogen fixation (acetylene reduction and soil-nitrogen components) in anaerobic soil

Adachi¹,

Watanabe

Kobayashi

et al. 1989

Soil Science and Plant Nutrition

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“…In the third cultivation, both growth-promotive and -inhibitory effects of straw and cellulose application, respectively, were observed but were not significant, probably because cellulose was not applied before the third cultivation (hence the effect of cellulose application was represented by the residual effect of the previous cellulose applications), and the addition of chemical fertilizer may have diluted the effects of straw and cellulose application. Based on the rice yield with and without straw application, Ponnamperuma (1984) and Ladha et al (1987) reported the increase of shoot and grain dry weight by straw application in field experiments. Ladha et al (1986), on the other hand, did not observe a significant increase in grain yield by straw application.…”

Section: Treatmentmentioning

confidence: 98%

“…In addition, biological nitrogen fixation (BNF) in paddy fields is generally enhanced by rice straw application. Evidences indicated the beneficial effect of rice straw incorporation on nitrogen fixation (acetylene reduction and soil-nitrogen components) and bacterial multiplication (Rice and Paul 1972;Yoneyama et al 1977;Matsuguchi 1979;Harper and Lynch 1984;Santiago-Ventura et al 1986;Ladha et al 1987;Adachi et al 1989). The enhancement of BNF by rice straw application could be considered for more efficient use of organic matter with the benefit of BNF and for the development of low-input technology for sustainable crop production.…”

mentioning

confidence: 95%

Promotive and inhibitory effects of rice straw and cellulose application on rice plant growth in pot and field experiments

Adachi

Chaitep

Senboku

1997

Soil Science and Plant Nutrition

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“…However, these rates of N2 fixation should be used with caution because the 15N measurements were made under laboratory conditions. Time-course measurements of N2 fixation using acetylene reduction methods (ARA) generally showed stimulation from a few days to about 40 days after straw application, followed by a gradual decline (Ladha et al, 1986b(Ladha et al, , 1987. When the N gain was expressed per g of straw added, it ranged from 2 to 4 mg N fixed g-l straw added.…”

Section: N2 Fixation In Flooded Soilsmentioning

confidence: 99%

Biological N2 fixation by heterotrophic and phototrophic bacteria in association with straw

Roper

Ladha

1995

Plant Soil

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IntroductionAsymbiotic diazotrophs Straw components and their direct utilisation by diazotrophs Aerobic and anaerobic cellulose degradation N2 fixation in soils by bacteria using products of straw decomposition N2 fixation in flooded soils N2 fixation in dryland soils Factors affecting N2 fixation associated with straw Ways to enhance straw-associated N2 fixation Conclusions References AbstractMuch of the crop residues, including cereal straw, that are produced worldwide are lost by burning. Plant residues, and in particular straw, contain large amounts of carbon (cellulose and hemicellulose) which can serve as substrates for the production of microbial biomass and for biological N2 fixation by a range of free-living, diazotrophic bacteria. Microorganisms with the dual ability to utilise cellulose and fix N2 are rare, but some strains that utilize hemicellulose and fix N2 have been found. Generally, cellulolysis and diazotrophy are carried out by a mixed microbial community in which N2-fixing bacteria utilise cellobiose and glucose produced from straw by cellulolytic microorganisms. N2-fixing bacteria include heterotrophic and phototrophic organisms and the latter are 212 apparently more prominent in flooded soils such as rice paddies than in dryland soils. The relative contributions of N2 fixed by heterotrophic diazotrophic bacteria compared with cyanobacteria and other phototrophic bacteria depend on the availability of substrates from straw decomposition and on environmental pressures. Measurements of asymbiotic N2 fixation are limited and variable but, in rice paddy systems, rates of 25 kg N ha-1 over 30 days have been found, whereas in dryland systems with wheat straw, in situ measurements have indicated up to 12 kg N ha-l over 22 days. Straw-associated N2 fixation is directly affected by environmental factors such as temperature, moisture, oxygen concentration, soil pH and clay content as well as farm management practices. Modification of managements and use of inoculants offer ways of improving asymbiotic N2 fixation.In laboratory culture systems, inoculation of straws with cellulolytic and diazotrophic microorganisms has resulted in significant increases in N2 fixation in comparison to uninoculated controls and gains of N of up to 72 mg N fixed g-~ straw consumed have been obtained, indicating the potential of inoculation to improve N gains in composts that can then be used as biofertilisers. Soils, on the other hand, contain established, indigenous microbial populations which tend to exclude inoculant microorganisms by competition. As a consequence, improvements in straw-associated N2 fixation in soils have been achieved mostly by specific straw-management practices which encourage microbial activity by straw-decomposing and N2-fixing microorganisms.Further research is needed to quantify more accurately the contribution of asymbiotic N2 fixation to cropping systems. New strains of inoculants, including those capable of both cellulolytic and N2-fixing activity, are needed to improve the N content of biofe...

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The effects on N2 fixation (C2H2 reduction), bacterial population and rice plant growth of two modes of straw application to a wetland rice field

Cited by 20 publications

References 17 publications

Effect of application of glucose, cellulose, and rice straw on nitrogen fixation (acetylene reduction and soil-nitrogen components) in anaerobic soil

Effect of application of glucose, cellulose, and rice straw on nitrogen fixation (acetylene reduction and soil-nitrogen components) in anaerobic soil

Promotive and inhibitory effects of rice straw and cellulose application on rice plant growth in pot and field experiments

Biological N2 fixation by heterotrophic and phototrophic bacteria in association with straw

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