Effects of compost stability on plant growth, microbiological parameters and nitrogen availability in media containing mixed garden-waste compost

Keeling, A.A.; Griffiths, Bryan S.; Ritz, Karl; Myers, M. G.

doi:10.1016/0960-8524(95)00138-7

Cited by 31 publications

(10 citation statements)

References 15 publications

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“…The difference in age between the two composts also may have resulted in a different compost microbiology, and hence different microbial populations added to the soil. Keeling et al (1995) found an increased population of protozoa, especially ciliate, in young compost compared to more mature compost, and this difference remained visible when the composts were mixed with sand and grit (at a rate of 50% compost in the mixture) and used as growth medium. The compost microfauna was not analysed in this experiment, but because of the relatively low dose of compost added, we think that it is unlikely that any difference in compost microbiology would have a major and lasting impact on the overall soil microbiology.…”

Section: Discussionmentioning

confidence: 99%

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Neve

2004

Soil Biology and Biochemistry

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We have studied the possibilities of manipulating N mineralization from high N vegetable crop residues by the addition of organic materials, with the aim of initially immobilizing the mineralized residue N with a view to stimulating remineralization at a later stage. Residues of leek (Allium porrum) were incubated with soil, alone and in combination with straw, two types of green waste compost (with contrasting C:N ratios) and tannic acid. Evolution of mineral N was monitored by destructive sampling. After 15 weeks, molasses was added to part of the samples in each treatment, and incubation continued for another 12 weeks. All materials added during the first incubation stage, except the low C:N compost, resulted in significant immobilization of the residue N. The immobilization with the high C:N compost (41.4 mg N kg 21 soil) was significantly larger than with tannic acid and straw (both immobilized about 26 mg N kg 21 soil). In the straw treatment, remineralization started in the first stage of incubation from day 50 onwards. The addition of molasses caused a strong and significant remineralization in the second stage (equivalent to 73% of the N initially immobilized) in the treatment with the high C:N ratio compost. In the case of tannic acid, there was no consistent effect on mineralization from addition of molasses. This was attributed to the fact that the immobilization observed was due to chemical rather than biological fixation of the residue N. A number of non-toxic organic wastes could be considered for use in mediating release of immobilized N from high N crop residue materials in an attempt to synchronize residue N availability with crop N demand. q

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Section: Discussionmentioning

confidence: 99%

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Neve

2004

Soil Biology and Biochemistry

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“…E.mail:akeeling@haac.ac.uk on soil free living nitrogen fixer (FLNF) populations and grass yields. The compost was derived from garden green waste (tree branches, hedge-trimmings and weeds), and has been fully described (Keeling et al, 1995). The purpose of the experiment described here was to determine the effects of repeated glucose addition twice weekly for 8 weeks) on the yields of grass in a well-established sward, and on the numbers of N2-fixers.…”

Section: Introductionmentioning

confidence: 99%

Application of glucose at low concentrations to grass swards in waste-derived compost can significantly increase long-term yields

et al. 1996

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Carbohydrates have a range of effects on soil, dependent on the frequency and concentration of the application. Small quantities of glucose have the effect of accelerating the removal of available N (NH +, NO~) through incorporation into the bodies of microorganisms. This reduces plant growth (Jenkinson, 1985), the rate of which depends largely on the presence of available N (Addiscott et al., 1991). However, in theory, if appropriate soil glucose concentrations are maintained, asymbiotic N2-fixation will occur, supplying extra nitrogen nutrition to plants over an extended period. Here, it is demonstrated that the use of 0.028 M glucose and an appropriate source of N2-fixing bacteria (green waste-derived compost) can result in increased grass dry matter yields of over 50% in a glasshouse experiment.

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“…Residual turbidity-The stability of the micro aggregates to dispersion, was evaluated using the residual turbidity method (Lynch & Elliott 1983). Soil samples (0.5 g, 1.0 to 2.0 mm) were placed in test tubes containing 30 ml solution adjusted to SAR value of five or 20, having a total electrolyte concentration of 10 meq/1.…”

Section: Compost Science and Utilizationmentioning

confidence: 99%

Determining Optimal Maturity of Compost Used for Land Application

Sela

Goldrat

Avnimelech

1998

Compost Science & Utilization

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Effects of compost stability on plant growth, microbiological parameters and nitrogen availability in media containing mixed garden-waste compost

Cited by 31 publications

References 15 publications

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Application of glucose at low concentrations to grass swards in waste-derived compost can significantly increase long-term yields

Determining Optimal Maturity of Compost Used for Land Application

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