Effect of residue placement and chemical fertilizer on soil microbial biomass under tropical dryland cultivation

Singh, H. K.; Singh, K. P.

doi:10.1007/bf00369304

Cited by 69 publications

(39 citation statements)

References 31 publications

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“…The C/N, C/P and N/P ratios of the microbial biomass observed in this study were within the normal range mentioned in literature, with 2.2-14.1 for C/N (Smith & Paul, 1990;Balota et al, 2003), 5.0 -276 for C/P (Joergensen et al, 1995;He et al, 1997) and 1.0-4.2 for N/P (Singh & Singh, 1993;Balota et al, 2003).…”

Section: Microbial Biomass Ratiosupporting

confidence: 88%

Soil microbial biomass under different management and tillage systems of permanent intercropped cover species in an orange orchard

Balota¹,

Auler²

2011

Rev. Bras. Ciênc. Solo

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SUMMARYTo mitigate soil erosion and enhance soil fertility in orange plantations, the permanent protection of the inter-rows by cover species has been suggested. The objective of this study was to evaluate alterations in the microbial biomass, due to different soil tillage systems and intercropped cover species between rows of orange trees. The soil of the experimental area previously used as pasture (Brachiaria humidicola) was an Ultisol (Typic Paleudult) originating from Caiuá sandstone in the northwestern part of the State of Paraná, Brazil. Two soil tillage systems were evaluated: conventional tillage (CT) in the entire area and strip tillage (ST) (strip width 2 m), in combination with different ground cover management systems. The citrus cultivar 'Pera' orange (Citrus sinensis) grafted onto 'Rangpur' lime rootstock was used. Soil samples were collected after five years of treatment from a depth of 0-15 cm, under the tree canopy and in the inter-row, in the following treatments: (1) CT and an annual cover crop with the leguminous species Calopogonium mucunoides; (2) CT and a perennial cover crop with the leguminous peanut Arachis pintoi; (3) CT and an evergreen cover crop with Bahiagrass Paspalum notatum; (4) CT and a cover crop with spontaneous Brachiaria humidicola grass vegetation; and (5) ST and maintenance of the remaining grass (pasture) of Brachiaria humidicola. Soil tillage and the different cover species influenced the microbial biomass, both under the tree canopy and in the interrow. The cultivation of brachiaria increased C and N in the microbial biomass, while bahiagrass increased P in the microbial biomass. The soil microbial biomass was enriched in N and P by the presence of ground cover species and according to the soil P content. The grass species increased C, N and P in the soil microbial biomass from the inter-row more than leguminous species.Index terms: microbial activity, soil tillage, nutrient cycling, citrus management.

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Section: Microbial Biomass Ratiosupporting

confidence: 88%

Soil microbial biomass under different management and tillage systems of permanent intercropped cover species in an orange orchard

Balota¹,

Auler²

2011

Rev. Bras. Ciênc. Solo

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“…of the material added to the soil, as evidenced previously in many papers (Ocio et al, 1991;Singh & Singh, 1993;Jensen et al, 1997;Goyal et al, 1999). Considering the cover utilized, the behavior was distinct with regard to Cm, presenting a higher value for A. pintoi and smaller values for the treatment without cover (control), which was not different from P. phaseoloides and M. atropurpureum (Table 5).…”

Section: Assaysupporting

confidence: 65%

Perennial herbaceous legumes as live soil mulches and their effects on C, N and P of the microbial biomass

Duda

Guerra

Monteiro³

et al. 2003

Sci. agric. (Piracicaba, Braz.)

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The use of living mulch with legumes is increasing but the impact of this management technique on the soil microbial pool is not well known. In this work, the effect of different live mulches was evaluated in relation to the C, N and P pools of the microbial biomass, in a Typic Alfisol of Seropédica, RJ, Brazil. The field experiment was divided in two parts: the first, consisted of treatments set in a 2 x 2 x 4 factorial combination of the following factors: live mulch species (Arachis pintoi and Macroptilium atropurpureum), vegetation management after cutting (leaving residue as a mulch or residue remotion from the plots) and four soil depths. The second part had treatments set in a 4 x 2 x 2 factorial combination of the following factors: absence of live mulch, A. pintoi, Pueraria phaseoloides, and M. atropurpureum, P levels (0 and 88 kg ha -1) and vegetation management after cutting. Variation of microbial C was not observed in relation to soil depth. However, the amount of microbial P and N, water soluble C, available C, and mineralizable C decreased with soil depth. Among the tested legumes, Arachis pintoi promoted an increase of microbial C and available C content of the soil, when compared to the other legume species ( Pueraria phaseoloides and Macroptilium atropurpureum ). Keeping the shoot as a mulch promoted an increase on soil content of microbial C and N, total organic C and N, and organic C fractions, indicating the importance of this practice to improve soil fertility. ) e manejo dos resíduos da parte aérea das plantas. Não houve variação do C microbiano com a profundidade do solo. Porém, para o P e N microbianos, C orgânico do solo, C solúvel em água, disponível e mineralizável, o aumento da profundidade proporcionou diminuição destas características. As leguminosas usadas influenciaram de maneira diferenciada as variáveis analisadas. O A. pintoi promoveu elevação nos teores de C microbiano e disponível, comparativamente as demais espécies utilizadas ( P. phaseoloides e M. atropurpureum). A manutenção dos resíduos das leguminosas após cada corte promoveu aumentos nos teores de C e N microbianos, C orgânico e N total e frações de C orgânico do solo enfatizando a importância de utilização desta prática para melhorar a fertilidade do solo. Palavras-chave: fósforo microbiano, adubo verde, ciclagem de nutrientes

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“…Nitrogen release from green manures and FYM in a vertisol of central India has shown that the application of a high rate of FYM caused more rapid immobilization of mineral N in soil than a low rate of application [72]. To counter the immobilization demand, initial application of N from external sources to soils has been reported for manures [53] and crop residues [100], and the model provides an option for estimating how much N is required.…”

Section: Nitrogen Dynamics Of Crop Residuesmentioning

confidence: 99%

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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Summary Wastes generated from municipal and agricultural activities have the tremendous potential for application in agriculture as a source of nutrients and as amendments to improve soil organic matter (SOM). A decline in SOM can represent a serious threat to soil fertility and quality. Nitrogen (N) mineralization from organic amendments is important for understanding the N dynamics in terrestrial ecosystems. In this review, quality of the amendments such as C/N ration, N content, and biochemical compositions, etc. are discussed. Since, C/N ratio cannot explain all differences in N mineralization; emphasis has been laid on characterizing different compounds in organic amendments that govern the mineralization process. The importance of simulation models has also been described in modeling N mineralization from some complex materials like compost, animal manures and farmyard manures. These complex simulation models once modified according to the quality of the organic amendments can simulate N mineralization and thus, they can be used for simulating N dynamics in terrestrial eco-systems.

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Effect of residue placement and chemical fertilizer on soil microbial biomass under tropical dryland cultivation

Cited by 69 publications

References 31 publications

Soil microbial biomass under different management and tillage systems of permanent intercropped cover species in an orange orchard

Soil microbial biomass under different management and tillage systems of permanent intercropped cover species in an orange orchard

Perennial herbaceous legumes as live soil mulches and their effects on C, N and P of the microbial biomass

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

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