土壤氮素矿化及氮对苜蓿生产的影响研究

Study on Effects of Soil Nitrogen Mineralization and Nitrogen Fertilization on Alfalfa Production

结合苜蓿草地,详细阐述了土壤氮素矿化过程及影响土壤氮素矿化的主要因素。温度、湿度、深度、土壤理化性质、肥料施入、土壤动物及微生物均对土壤氮矿化有影响,其中土壤温度和湿度是影响土壤氮素矿化的重要因子。在总结氮肥施用对苜蓿根瘤、草产量、种子产量和苜蓿品质影响的基础上,提出了今后应结合土壤氮素矿化,进行苜蓿草地氮素调控的研究。

The soil nitrogen mineralization progress and the main influencing factors in alfalfa grassland are introduced.Temperature,humidity,depth,soil physical and chemical properties,fertilizer,soil animals and microorganisms all have impact on soil nitrogen mineralization,and the soil temperature and humidity are the important factors influencing the soil nitrogen mineralization.The effects of nitrogen fertilization on root nodules,grass yield,seed yield and quality of alfalfa are summarized.The nitrogen regulation in alfalfa grassland should be studied combining with soil nitrogen mineralization.