论文部分内容阅读
甜菜对氮素的需求量较大,一般土壤中的含量常不能满足其需要,须通过施肥予以补充。对于甜菜在不同生育期对氮素的需求量,已有很多报道,但如何正确施用氮肥,以满足其在不同生育期对氮素的需求,提高氮肥的利用率,这方面的报道甚少。笔者于1990～1991年进行了同等量氮肥不同施用方法的试验,看出氮肥不同施用方法对甜菜的长势及产质量影响很大,说明合理施用氮肥是甜菜增产、增糖的重要手段之一。材料与方法
Beet nitrogen on the larger demand, the general content of the soil often can not meet their needs, to be supplemented by fertilization. There have been many reports on the demand of nitrogen for sugarbeet at different growth stages. However, there are few reports on how to apply nitrogen fertilizer correctly to meet the demand of nitrogen in different growth stages and improve the utilization rate of nitrogen fertilizer. In 1990 ~ 1991, the author carried out the same amount of nitrogen fertilizer application methods test, we can see that different application methods of nitrogen fertilizer have a great influence on the growth and yield and quality of sugar beet, indicating that rational application of nitrogen fertilizer is one of the important means of sugar beet production and sugar increase. Materials and Methods