Dynamics of soil total C and N, microbial biomass, and water-soluble C in tropical agroecosystems

Mazzarino, Marı́a Julia; Szott, L. T.; Jimenez, Miguel

doi:10.1016/0038-0717(93)90028-a

Cited by 86 publications

(47 citation statements)

References 33 publications

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“…The C : N ratio of soil microbial biomass varied from 7 : 1 to 13 : 1 (Table 3). These ratios were lower than microbial biomass C : N ratios of 13É5 : 1È16É5 : 1 reported for some soils of tropical agroecosystems (Mazzarino et al 1993). The C : N ratio probably reÑected the variation in OC and N input.…”

Section: Soil Treatmentmentioning

confidence: 81%

The cation exchange properties and microbial carbon, nitrogen and phosphorus in savanna Alfisol under continuous cultivation

Goladi

Agbenin

1997

J. Sci. Food Agric.

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Section: Soil Treatmentmentioning

confidence: 81%

The cation exchange properties and microbial carbon, nitrogen and phosphorus in savanna Alfisol under continuous cultivation

Goladi

Agbenin

1997

J. Sci. Food Agric.

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“…Surprisingly, at 750 mm from Senna hedges, there was as much soil water as elsewhere in the plots, but soil moisture decreased between 750 and 3000 mm from Senna. Increases in soil moisture close to managed hedges relative to elsewhere seem quite common (Lal, 1989;Mazzarino et al, 1993;Chirwa et al, 1994;Govindarajan et al, 1996), and have been variously ascribed to reduced evaporation, improved moisture penetration and increased presence of organic matter which improved soil water holding capacity. However, intuitively, where soil moisture removal by plants rather than by evaporation, surface runoff or drainage is the main source of soil moisture removal, a trend of decreased soil moisture content in proximity of trees will develop.…”

Section: Soil Watermentioning

confidence: 99%

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et al. 2001

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and Gliricidia sepium (Jacq.) Walp. growing in association with maize (Zea mays L.) were examined in semiarid Kenya during the long rains of 1996 and 1997. Even although tree roots penetrated more deeply than maize roots, maximum root length densities for both tree species and maize occurred in the top 200 mm of the soil profile where soil moisture was frequently recharged by rains. Populations of roots in plots containing trees were dominated by tree roots at the beginning of the growing season but because tree roots died and maize root length increased during the cropping season, amounts of tree and maize roots were similar at the end of the season. Thus, there was evidence of temporal separation of root activity between species, but there was no spatial separation of the rooting zones of the trees and crops within that part of the soil profile occupied by crop roots. Tree root length density declined with increasing distances from rows of trees and with depth in the soil profile.Although Grevillea trees were largest, plots containing G. sepium trees always contained more tree roots than plots containing G. robusta trees and Gliricidia was more competitive with maize than Grevillea. Overall, Gliricidia reduced crop yield by about 50% andGrevillea by about 40% relative to crop yield in control plots lacking trees and reductions of crop yield were greatest close to trees. There was less soil moisture in plots containing trees than in control plots. Such difference between control plots and plots containing trees were maximal at the end of the dry season and there was always less soil moisture close to trees than elsewhere in the plots. Plots containing Gliricidia trees contained less soil water than plots containing Grevillea trees.

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“…If the measurement was conducted in 0.01 M CaCl2 or 1 M KCl solution, the data would have been converted to pH in water by multiplying the value with 1.1 (Mao et al 1992;Joergensen and Castillo 2001;Cerri et al 2006). The majority of soil organic C values were obtained by the Walkley-Black method (Srivastava and Singh 1991;Mazzarino et al 1993;Motavalli et al 2000), using potassium dichromate sulphuric acid oxidation as described, for example, by Nelson and Sommers (1982). Loss of ignition was sometimes used to determine soil organic C (Northup et al 1999;Michelsen et al 2004).…”

Section: Soil Chemical Propertiesmentioning

confidence: 99%

The benefit of top soil and fertilizer mixture to improve the ex-coal mining land

2017

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Abstract. Sopialena, Rosfiansyah, Sila S. 2017. The benefit of top soil and fertilizer mixture to improve the ex-coal mining land. Nusantara Bioscience 9: 36-43. The mining activities have led severe impacts on some environmental issues including a decrease in soil fertility, which affects the ability of soil to supply soil nutrients to growing plants, a destruction in soil structure, and the loss of microorganisms, which are important for reforming process to treat organic materials. In this regards, reclamation of mined degraded land has been continually used to improve soil structure and its microorganisms. In practice, for large scale reclamation, fertilizer use can primarily enhance soil qualities in improving plant's growth and yield. It is suggested that healthy soil should contain millions of microorganisms at the aggregation which leads to the improvement of soil nutrients and its structure, as the medium for plant growth. For this purpose, therefore, this study aimed to determine the impact of organic fertilizer (Ostindo) and top soil mixture on microbial diversity, soil fertility and the growth of sengon (Paraserianthes falcataria L. Nielsen). This study made use of a randomized block design, using four treatments and five replications including P0: without top soil and fertilizer, P1: with top soil but without fertilizer, P2: without top soil but with fertilizer, P3: mixture of top soil and fertilizer. The results showed that a mixture of top soil and fertilizer has successfully increased in the number of fungal genus, starting from two genus (Phytium and Penicillium) turning into five genus (Phytium, Fusarium, Penicillium, Aspergillus, and Rhizoctonia), as well as in the number of nematode genus, from two (Dorylaimus and Rhabditis) turning into five genus (Dorylaimus, Steinernema, Dorylaimus, Hoplolaimus, and Mononchus). This study indicated that the mixture has significantly improved soil health in ex-coal mining land, which was viable through the pH level (almost neutral), the significant increase of C, N and P 2 O 5 , and also the growth of Sengon. In conclusion, this study succeeds in demonstrating that the mixture of top soil and fertilizer has enhanced the microbial diversity, soil fertility, and sengon growth.

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Dynamics of soil total C and N, microbial biomass, and water-soluble C in tropical agroecosystems

Cited by 86 publications

References 33 publications

The cation exchange properties and microbial carbon, nitrogen and phosphorus in savanna Alfisol under continuous cultivation

The cation exchange properties and microbial carbon, nitrogen and phosphorus in savanna Alfisol under continuous cultivation

Untitled

The benefit of top soil and fertilizer mixture to improve the ex-coal mining land

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