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对20种普通胶园土壤实验室培养的试验结果表明,天然有机态氮产生硝态氮的矿化作用有两种明显不同的模式。由Batu Anam、Segamat、Jerangau、Bungor、Durian、Malacca、Briah和Selangor八种土系组成的土组中,当土壤培养延长至12周,从土壤天然有机态氮中释放出的矿质氮主要是铵态氮,硝态氮很少,甚至没有。其余试验的土壤,开起时产生铵态氮,这些累积的铵态氮逐渐转化成硝态氮。可以认为,这些土壤由于缺乏自养硝化细菌,氮的硝化作用主要由异养微生物实现的。 土壤经培养12周之后,每克土壤矿化20—100微克氮,占全氮的2.9—6.4％。天然土壤有机态氮的矿化量,与土壤含沙百分率、全氮矿化百分率和有机碳显著相关,而与全磷、粘土和全氮极显著相关。
The results of laboratory experiments on 20 common soils showed that there are two distinct modes for mineralization of nitrate by natural organic nitrogen. In the soil group consisting of eight soil systems of Batu Anam, Segamat, Jerangau, Bungor, Durian, Malacca, Briah and Selangor, when the soil culture was extended to 12 weeks, the mineral nitrogen released from the soil natural organic nitrogen was mainly ammonium Nitrogen, nitrate Nitrogen is little, not even. The rest of the soil tested started to produce ammonium nitrogen, which accumulated ammonium nitrogen was gradually converted to nitrate nitrogen. It can be assumed that the nitrification of nitrogen in these soils is mainly caused by heterotrophic microorganisms due to the lack of autotrophic nitrifying bacteria. After 12 weeks of incubation, soil mineralized 20-100 micrograms of nitrogen per gram of soil, accounting for 2.9-6.4% of total nitrogen. Mineralization amount of organic N in natural soils was significantly related to soil sediment percentage, total N mineralization percentage and organic carbon, but significantly related to P, C and N.