摘要
本文用砂滤管法研究了甜菜生育期间黑土0～120 cm 的矿化率和不同有机肥及其不同施肥水平的矿化率。结果表明,耕层土壤的矿化率显著高于心土层和底土层;不同有机肥矿化率顺序为鸡粪>马粪>猪粪>牛粪;同种有机肥随施量水平的增加,其矿化率也呈增加趋势;增施氮肥可显著地提高土壤氮的矿化率,说明化肥氮对土壤有机质的矿化具有显著的激发效应。
The method of sand filter tube was used to study the mineralization rate of black soil(0～120 cm)and different organic manures with different manuring levels.The results indicatedthat the mineralization rate of the tilth soil(0～30 cm)>sub soil(30～60 cm)>hasal soil(60～120 cm).the mineralization rates of different organic manures were sequenced aschicken>horse>pig>cattle.The mineralization rate of any kind of the manures increasedwith its increased application.Increasing nitrogen could increase the mineralization rate ofsoil N.significantly.It can be seen that fertilizer N.has significant exciting effect on themineralization rate of soil organic matter.The result helps apply N quantitatively,increasesuigar yield and decrease the cost of manure.
基金
国家自然科学基金
霍英东教育基金会资助.
关键词
甜菜
黑土
有机肥
砂滤管
矿化率
sugar beet
black soil
organic manure
mineralization rate
sand filter tube
