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• W1996289980 abstract "In this study, leguminous crops like Atylosia scarabaeoides, Centrosema pubescens, Calopogonium mucunoides, and Pueraria phaseoloides. grown as soil cover individually in the interspaces of a 19-yr-old coconut plantation in S. Andaman (India) were assessed for their influence on various microbial indices (microbial biomass C, biomass N, basal respiration, ergosterol, levels of ATP, AMP, ADP) in soils (0–50 cm) collected from these plots after 10 years. The effects of these cover crops on . CO2 (metabolic quotient), adenylate energy charge (AEC), and the ratios of various soil microbial properties viz., biomass C : soil organic C, biomass C : N, biomass N : total N, ergosterol : biomass C, and ATP : biomass C were also examined. Cover cropping markedly enhanced the levels of organic matter and microbial activity in soils after the 10-yr-period. Microbial biomass C and N, basal respiration, . CO2, ergosterol and levels of ATP, AMP, ADP in the cover-cropped plots significantly exceeded the corresponding values in the control plot. While the biomass C : N ratio tended to decrease, the ratios of biomass N : total N, ergosterol : biomass C, and ATP : biomass C increased significantly due to cover cropping. Greater ergosterol : biomass C ratio in the cover-cropped plots indicated a decomposition pathway dominated by fungi, and high . CO2 levels in these plots indicated a decrease in substrate use efficiency probably due to the dominance of fungi. The AEC levels ranged from 0.80 to 0.83 in the cover-cropped plots, thereby reflecting greater microbial proliferation and activity. The ratios of various microbial and chemical properties could be assigned to three different factors by principal components analysis. The first factor (PC1) with strong loadings of ATP : biomass C ratio, AEC, and . CO2 reflected the specific metabolic activity of soil microbes. The ratios of ergosterol : biomass C, soil organic C : total N, and biomass N : total N formed the second factor (PC2) indicating a decomposition pathway dominated by fungi. The biomass C : N and biomass C : soil organic C ratios formed the third principal component (PC3), reflecting soil organic matter availability in relation to nutrient availability. Overall, the study suggested that Pueraria phaseoloides. or Atylosia scarabaeoides were better suited as cover crops for the humid tropics due to their positive contribution to soil organic C, N, and microbial activity. Langzeiteffekte von Leguminosen als Deckfrucht in den Böden einer Kokosnussplantage auf die mikrobiellen Indikatoren und deren Verhältnisse zueinander Der Langzeiteintrag durch Leguminosen in Böden kann verschiedene Effekte auf die mikrobielle Biomasse und deren Aktivität haben. In dieser Studie wurde der Einfluss von Leguminose-Pflanzen wie Atylosia scarabaeoides, Centrosema pubescens, Calopogonium mucunoides und Pueraria phaseoloides als Deckfrucht zwischen den Stämmen einer 19 Jahre alten Kokosnussplantage in S. Andaman (Indien) auf verschiedene mikrobielle Indikatoren und ihre Verhältnisse in Böden (0–50 cm) nach einem Zeitraum von 10 Jahren untersucht. Nach 10 Jahren hatten die Deckfrüchte die Gehalte an organischem Material und die mikrobielle Aktivität in den Böden gesteigert. Der mikrobielle Biomassenkohlenstoff und -stickstoff, die basale Atmung, der metabolische Quotient (. CO2), Ergosterol- und Adenylatgehalte (ATP, AMP, ADP) der Flächen mit Deckfrüchten überstiegen die der Kontrollfläche. Während das Biomasse-C:N-Verhältnis tendenziell durch Deckfrüchte sank, stiegen das Biomasse-N:Gesamt-N-, Ergosterol:Biomasse-C- und das ATP:Biomasse-C-Verhältnis signifikant an. Das Verhältnis Biomasse-C:organischer C stieg mit Deckfrüchten an, allerdings war der Anstieg nicht signifikant. Deckfrüchte führten zu einem signifikantem Anstieg des . CO2 und des AEC (Adenylate Energy Charge). Dies zusammen mit den höheren ATP:Biomasse-Verhältnissen legt die Schlussfolgerung nahe, dass Deckfrüchte (speziell Pueraria phaseoloides oder Atylosia scarabaeoides) die mikrobielle Aktivität und die Effizienz der Substratnutzung langfristig durch die bessere Verfügbarkeit organischen Materials deutlich erhöhen." @default.
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• W1996289980 date "2004-03-30" @default.
• W1996289980 modified "2023-10-04" @default.
• W1996289980 title "Long‐term effects of leguminous cover crops on microbial indices and their relationships in soils of a coconut plantation of a humid tropical region" @default.
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• W1996289980 doi "https://doi.org/10.1002/jpln.200321294" @default.
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