几种农家堆肥模式中的氮素与有机质变化比较

选择了秸秆覆盖、棚膜覆盖和土层覆盖等3种农家堆肥模式,以无覆盖为对照,比较了各种模式中全氮、铵态氮、硝态氮、有机质、温度和pH值变化.结果表明,随着堆肥的进行,各种模式全氮呈现先下降再上升、铵态氮先上升再下降、硝态氮一直下降,并且最后趋于稳定.棚膜堆肥的全氮、铵态氮、有机质含量一直高于其他处理,而硝态氮含量低于其他处理,因而是一种值得推荐的农家堆肥模式.

Comparation on Variations of Nitrogen and Organic Matter in Several Kinds of Farmyard Composting Processes

Straw mulch,shed film coverage and Soil Strata coverage were chosen as three different farmyard composting modes for study.With unmulched systems as control experiments,changes of total nitrogen,ammonium nitrogen,nitratenitrogen,organic matter,temperature and pH value in three kinds of farmyard composting processes were compared.The results showed that in three processes the content of total nitrogen decreased firstly and then rose,the content of ammonium nitrogen rose firstly and then decreased,the content...