soil organic nitrogen的意思|示意

In low fertility soils, the effects of organic materials on soil microbial biomass nitrogen was rather apparent, about 4 times of high fertility soil.

土壤肥力不同，有机物料对微生物体的影响效果不同，在低肥力土壤上的效果突出，约为高肥力土壤的4倍。

The influence of application of organic and nitrogen fertilizer on the content of alkali hydrolysable N in fertilities soil was studied.

对设施土壤中长期施有机肥与氮肥对土壤中碱解氮含量的影响进行了研究。

Results showed that energy and materials input were mainly organic. There were surplus of nitrogen, phosphorus and potassium in the farmland soil pool.

结果表明：该农户生态系统能量和物质的投入均以有机为主，农田土壤库中氮、磷、钾均有盈余。

Results showed that soil total nitrogen and organic nitrogen fractions were significantly influenced by long-term application of chemical fertilizer and manure.

结果表明，长期施用化肥和有机肥对土壤全氮和土壤有机氮组成有显著影响。

A comprehensive review of the studies on soil organic nitrogen compounds and the types of its mineralizable models is presented.

就目前土壤有机氮组分方面的研究情况作一简要综述，探讨土壤有机氮矿化模型类型，以及今后其模型研究的方向。

The results showed that straw application increased crop yield, soil organic carbon accumulation, soil total nitrogen and phosphorus content as well as phosphorus activation.

结果表明，秸秆还田提高了作物产量，增加了土壤有机碳积累和土壤氮磷含量，且能活化土壤磷素。