Soil moisture and soil-litter mixing effects on surface litter decomposition: A controlled environment assessment

Lee, Hanna; Fitzgerald, Jessica; Hewins, Daniel B.; McCulley, Rebecca L.; Archer, Steven R.; Rahn, T.; Throop, Heather L.

doi:10.1016/j.soilbio.2014.01.027

Cited by 107 publications

(71 citation statements)

References 56 publications

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“…Green manure may counterbalance the rapid decrease in soil organic matter brought by the high rates of organic matter decomposition, which occur under conditions of high temperature and ultraviolet radiation (Parton et al, 2007;King et al, 2012) and high soil humidity (Lee et al, 2014). In spite of green manure mixtures being a growing practice in the region (Pimentel et al, 2011;Feitosa et al, 2015;Mouco et al, 2015;Pereira Filho et al, 2016), determinations of their biomass production and especially N fixation are scarce.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fixation of Poaceae and Leguminoseae in a green manure experiment in the Brazilian semiarid region

Neto¹,

Freitas²,

Giongo³

et al. 2017

Aust J Crop Sci

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Mixtures of green manure species, including Leguminosae and Poaceae, planted prior to commercial crops may incorporate more biomass than Leguminosae alone and fix more nitrogen than Poaceae alone. Biomass and nitrogen incorporation of three plant treatmens were compared under irrigation condition. In two mixture treatments, the same seven green manure species were planted together but with different seeding proportions. Treatment (1) (low-legume) had 50% the recommended seeding rate of the legume species (jack beans, cowpea and sunn hemp) and 150% the recommended seeding rate of the non-legume species (maize, pearl millet, sorghum and sun flower). The other treatment (2) (high-legume) had opposite proportions. In the third treatment, no green manure plants were sown and weed plants were allowed to grow. The results showed that biomass (9.1 and 8.2 Mg ha -1 ) and nitrogen accumulation (160 and 161 kg ha -1 ) did not differ between the low-legume and high-legume treatments, respectively, which were 2.5 times higher than those of the weed treatment (3.3 Mg ha -1 and 58.1 kg ha -1 ). Despite the higher non-legume biomass proportion and lower nitrogen concentration, the low-legume treatment symbiotically fixed as much N (52 kg ha -1 ) as the high-legume treatment because sorghum derived more N from the atmosphere (79 %) and maize in the same range as the legume species (37 to 54%). Therefore, sorghum and maize can have high N endophytic fixation and green manure prior to commercial crops can be produced both with legume and Poaceae species mixed together, providing a high input of N and biomass in a short period.

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Section: Introductionmentioning

confidence: 99%

Nitrogen fixation of Poaceae and Leguminoseae in a green manure experiment in the Brazilian semiarid region

Neto¹,

Freitas²,

Giongo³

et al. 2017

Aust J Crop Sci

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“…Soil moisture content shows a parabolic effect on decomposition rates during times of constant soil temperature, with a maximum rate at intermediate levels of moisture (Meentemeyer, 1978;Swift et al, 1979;Lee et al, 2014). High moisture content (VWC > 30%) restricts soil gas exchange leading to low oxygen concentrations and potentially anaerobic conditions (Meentemeyer, 1978;Lee et al, 2014).…”

Section: Decompositionmentioning

confidence: 99%

Nutrient Dynamics and Decomposition of Riparian Arundinaria gigantea (Walt.) Muhl. Leaves in Southern Illinois

Nelson

Schoonover

Williard

2016

ENRR

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Leaf litter quality and quantity can influence soil nutrient dynamics and stream productivity through decomposition and serving as allochthonous stream inputs. Leaf deposition, nitrogen (N)-resorption efficiency and proficiency, and decomposition rates were analyzed in riparian stands of Arundinaria gigantea (Walt.) Muhl. in southern Illinois for the first time to determine potential nutrient cycling from riparian canebrake restoration. Leaf litter was collected from five established canebrakes monthly over one year and a decomposition study was conducted over 72 weeks. Live leaves, freshly senesced leaves, and decomposed leaves were analyzed for carbon (C) and N content. Leaf litterfall biomass peaked in November at twice the monthly average for all but one site, indicating a resemblance to deciduous leaf fall patterns. Nitrogen and C concentrations decreased 48% and 30%, respectively, between live leaves and 72 weeks following decomposition. High soil moisture appeared to slow decomposition rates, perhaps due to the creation of anaerobic conditions. Cane leaves have low resorption proficiency and nutrient-use proficiency, suggesting that these riparian canebrakes are not N limited. Giant cane should be considered in multispecies riparian buffer creation since it has this potential to supply carbon and nitrogen to the soil and to macroinvertebrates in the streams for a longer period of time and year round.

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“…The RH monitoring method has the potential to be applied under field conditions if the ambient RH is monitored simultaneously. Potential future improvements to this method include a consideration of the effects of soil-litter mixing, which may buffer litter moisture (Lee et al, 2014), and a test of the effects of meteorological variables such as direct precipitation, wind, and solar radiation on RH-litter relationships. is based on the relative humidity dynamics of the control (i.e., ambient room relative humidity, (E)) during the measuring period.…”

Section: The Potential Application Under the Field Conditionsmentioning

confidence: 99%

A novel method to continuously monitor litter moisture – A microcosm-based experiment

Wang

Throop

Gill

2015

Journal of Arid Environments

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Soil moisture and soil-litter mixing effects on surface litter decomposition: A controlled environment assessment

Cited by 107 publications

References 56 publications

Nitrogen fixation of Poaceae and Leguminoseae in a green manure experiment in the Brazilian semiarid region

Nitrogen fixation of Poaceae and Leguminoseae in a green manure experiment in the Brazilian semiarid region

Nutrient Dynamics and Decomposition of Riparian Arundinaria gigantea (Walt.) Muhl. Leaves in Southern Illinois

A novel method to continuously monitor litter moisture – A microcosm-based experiment

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