摘要
好气培养条件下,白浆土有机N矿化量随培养时间延长而增长,但增加速度趋于下降,两者之间的数量关系遵从化学反应一级方程式。不同处理之间N矿化位势值高低排列顺序为:有机肥(403.55mg/kg)>秸秆还田(365.36mg/kg)>化肥(335.25mg/kg)>免耕(328.05mg/kg)>深翻(324.74mg/kg)>CK(268.65mg/kg)。N矿化位势值在3种耕法中未表现出明显差异。有机N矿化半衰期与施肥有关,有机肥处理的矿化半衰期最长,CK处理最短,有机肥比CK处理多4.12周。各施肥处理之间N矿化速率常数相差不大。
The amount of organic nitrogen mineralization increased but the increasing speed descended with incubation time in aerobic condition, and their relationship followed chemical first-order reaction equation. The order of nitrogen mineralization potential of different treatments was： Organic manure （403.55 mg/kg） 〉Straw returning back to field （365.36 mg/kg）〉Chemical fertilizers （335.25 mg/kg）〉No-tillage （328.05 mg/kg）〉Deep harrowing （324.74 mg/kg）〉 CK （268.65 mg/kg）, and no significant difference was found among the three tillage ways. The half-time of the organic nitrogen mineralization related with fertilization, and the half-life of the organic manure treatment was longest, 4.12 weeks longer than CK＇s （the shortest）. No significant difference in mineralization rate constant was found among all treatments.
出处
《土壤》
CAS
CSCD
北大核心
2007年第2期314-317,共4页
Soils
关键词
白浆土
耕作
施肥
氮素矿化
Albic soil, Cultivation, Fertilization, Nitrogen mineralization
