Data provider:

Icon data provider

The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

مقال مجلة

Wildfire-produced charcoal directly influences nitrogen cycling in ponderosa pine forests  [2006]

DeLuca, T.H.; MacKenzie, M.D.; Gundale, M.J.; Holben, W.E.;

استعراض النص الكامل

Fire is the primary form of disturbance in temperate and boreal forest ecosystems. However, our knowledge of the biochemical mechanisms by which fire stimulates forest N cycling is incomplete. Charcoal is a major byproduct of forest fires and is ubiquitous in soils of most forest ecosystems, yet the biological function of charcoal in soils of forest ecosystems has been greatly overlooked. We conducted a suite of laboratory experiments on soils from ponderosa pine (Pinus ponderosa Laws) forests to determine the influence of charcoal on soil N dynamics and in particular, nitrification. The addition of NH4(+) to forest soils had absolutely no effect on nitrification demonstrating that this process is not substrate limited. The amendment of these soils with NH4(+) and field collected charcoal (1% w/w) significantly increased the nitrification potential, net nitrification, gross nitrification, and decreased the solution concentrations of plant secondary compounds (phenolics). Charcoal had no effect on nitrification in soils (from a grassland site) that had naturally high rates of nitrifier activity. The increase in gross nitrification in forest soils and lack of effect on grassland soils suggests that charcoal may alleviate factors that otherwise inhibit the activity of the nitrifying microbial community in forest soils. These results reveal the biological importance of charcoal and advance our mechanistic understanding of how fire drives nutrient cycling in te
mperate and boreal ecosystems.

استعراض النص الكامل


معلومات ببليوغرافية

Journal Article
في أجريس منذ:
صفحة البداية:
صفحة النهاية:
جميع العناوين:
" Wildfire-produced charcoal directly influences nitrogen cycling in ponderosa pine forests "
مسائل أخرى:
" Includes references "


Soil Science Society of America journal

الرقم التسلسلي المعياري الدولي (ردمد) : 0361-5995