Study

Effects of organic matter amendments on net primary productivity and greenhouse gas emissions in annual grasslands

  • Published source details Ryals R. & Silver W.L. (2013) Effects of organic matter amendments on net primary productivity and greenhouse gas emissions in annual grasslands. Ecological Applications, 23, 46-59

Actions

This study is summarised as evidence for the following.

Action Category

Other biodiversity: Add compost to the soil

Action Link
Mediterranean Farmland

Soil: Add compost to the soil

Action Link
Mediterranean Farmland
  1. Other biodiversity: Add compost to the soil

    A replicated, randomized, controlled, paired study in 2008–2011 in grazed annual grasslands in California, USA, found more plant biomass in plots with added compost, compared to plots without added compost. Plants: More plant biomass (measured as carbon) was found in plots with added compost (50–175 more g C/m2/year, above ground, dry weight). Methods: Composted organic green waste was added to three treatment plots (129 g total N/m2), but not six control plots, at each of two sites (coastal grassland in Nicasio and valley grassland in Browns Valley). The plots were 25 x 60 m. Above-ground plant biomass was measured at the end of the growing season (1,800 cm2/plot).

     

  2. Soil: Add compost to the soil

    A replicated, randomized, controlled, paired study in 2008–2011 in grazed annual grasslands in California, USA, found more organic matter and carbon dioxide in soils with added compost, compared to soils without added compost. Organic matter: More organic carbon was found in soils with added compost, compared to soils without added compost, in three of seven comparisons (350–1,000 more g C/m2). Greenhouse gases: More carbon dioxide was found in soils with added compost, compared to soils without added compost, in four of six comparisons (150–250 more g CO2-C/m2/year), but no differences were found in other greenhouse gases (methane: –1.4 to –2.5 g CH4-C/ha/day; nitrous oxide: 0.1–1.0 g N2O-N/ha/day). Methods: Composted organic green waste was added to three treatment plots (129 g total N/m2), but not to six control plots, at each of two sites (coastal grassland in Nicasio and valley grassland in Browns Valley). The plots were 25 x 60 m. Greenhouse gases were measured in flux chambers, every 1–4 weeks for three years. Organic carbon was measured in soil samples that were collected at the end of the growing seasons (May or June, nine soil cores/plot, 7 cm diameter, 10 cm depth).

     

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 17

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust