Seasonal and Temporal Variation in Soil Microbial Biomass C, N and P in Different Types Land Uses of Dry Deciduous Forest Ecosystem of Udaipur, Rajasthan, Western India

Abstract

Patel et al.: Seasonal and temporal variation in soil microbial biomass C, N and P in different types land uses of dry deciduous forest -377 - Abstract. The soil microbial biomass of soil is being increasing recognized as sensitive indicator of soil quality. Its knowledge is fundamental for sustainable environment management. The soil microbial biomass C, N and P were studied in four different land uses of dry tropical forest of Udaipur, Rajasthan, Western India to assess the influence of abiotic, physico-chemical variables and difference in different land uses (mixed forest, butea plantation, grassland and agricultural lands) on the seasonal variation in soil microbial biomass. Microbial biomass C, N and P were highest during rainy season and lowest during winter in all the four different land use with the exception of microbial N which was lowest in summer in mixed forest and butea plantation. Microbial biomass C and N were shown to be significantly correlated to the abiotic and physico-chemical variables of the soil, such as soil temperature, relative humidity, soil moisture, organic C, total N, clay, and pH. Present study clearly shows that land use has a significant effect on microbial biomass C, N and P in soil by altering natural soil characteristics under the same ecological conditions.

Aplicación de inóculos líquidos de microorganismos nativos en el suelo: efecto en el crecimiento de plántulas de maíz

“…Velikonja et al (2003) usaron otra mezcla microbiana para acelerar la descomposición de residuos vegetales urbanos con una ganancia de 28% en la mineralización del C en comparación con testigos no tratados. Se ha sugerido, utilizar las poblaciones microbianas como reservorios vivientes de nutrientes (Efthimiadou et al, 2010;Patel et al, 2010). En experimentos realizados con plántulas de maíz en macetas adicionadas con residuos de E. americana, Payán et al (2013) obtuvieron mayores crecimientos utilizando inóculos microbianos con cepas nativas que sin ellas.…”

“…Las diferencias signif icativas (P < 0.05) en alturas de planta, solo se observaron entre algunos tratamientos microbianos 15 días después de la emergencia, y el tratamiento sin microbios no se diferenció de los tratados, lo que indica que si los nutrientes de los residuos de poda se conservaron en la biomasa microbiana, no se dio una mayor liberación de nutrientes por lo menos en los 63 días de duración Tratamientos T0 T1 T2 T3 T4 T5 T6 Tratamientos T0 T1 T2 T3 T4 T5 T6 Tratamientos T0 T1 T2 T3 T4 T5 T6 Tratamientos T0 T1 T2 T3 T4 T5 T6 Tratamientos T0 T1 T2 T3 T4 T5 T6 V del experimento. Este resultado pudo deberse a la falta de un inoculo adecuado o a la falta de actividad del mismo ya que Patel et al (2010) encontraron que la productividad de arroz (Oryza sativa) en la India se mejoró debido a un aumento en biomasa microbiana del suelo concomitantemente con una mayor liberación de nutrientes 50 días después de la aplicación de un abono verde, manteniendo un flujo anual de N a través de la biomasa microbiana de 30-45 kg ha -1 año -1 . La biomasa (peso seco de follaje, tallo y raíces) al f inal del experimento solo mostró diferencias signif icativas (P < 0.05) entre los tratamientos y el control T0, y fueron estadísticamente similares entre ellos (Figura 4).…”

The Effect of Biodiesel by-Products on Germination and Plant Growth

“…Studies have investigated whether the utilization of glycerol by microorganisms is a great possibility to convert that into value-added products (Barbirato et al, 1998;Johnson and Taconi, 2007;Yazdani and Gonzalez, 2007). The measurment of biologically active functions of organic matter, such as microbial biomass C, N, P and potential C, N and P mineralization were better able to reflect changes in soil quality and productivity (Patel et al, 2010). Biebl et al (1998) have analysed fermentation of glycerol by Klebsiella pneumoniae (Biebl et al, 1998;Zeng et al, 1993).…”

Effect of Water Availability on Soil Microbial Biomass in Secondary Forest in Eastern Amazonia

“…The dynamics of SMB are determined by biotic and abiotic factors that vary in space and over time in both natural and man-modified ecosystems (Jenkinson and Ladd, 1981;Wardle and Hungria, 1994). Variation in SMB over time is closely associated with changes in water availability in the soil (Patel et al, 2010), and its study contributes to the understanding of release and mineralization patterns (Wardle, 1998) of nutrients that will consequently be available for plants (Singh et al, 1989;Luizão et al, 1992).…”