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关于甜菜施用磷肥的增产效果,已经被农业生产所证实,并为糖农普遍接收。但是目前在磷肥施肥方法和施肥数量上还有不同看法。据苏联的一些研究材料认为:水溶性磷在土壤中移动范围不超过0.5cm,国内在华北地区土壤条件下的研究结果,磷肥移动范围在1cm 左右。磷肥这个特点与施肥技术关系是很密切,无论是施肥时期,施肥方法还是施肥数量,都要考虑磷肥在土壤中的活动状况。鉴于上述情况我们于1980年在内蒙农科院土壤条件下,应用~(32)P 研究水溶性磷肥(过磷酸钙)做种肥,追肥和根外追肥,测定甜菜吸收利用情况。
The yield increase effect of applying phosphate fertilizer to beet has been confirmed by agricultural production and widely accepted by sugar farmers. However, there are still different opinions on the methods and fertilization amounts of phosphorus fertilizers. According to some Soviet research materials: water-soluble phosphorus in the soil does not move within the range of 0.5cm, the domestic soil conditions in North China, the results of the study, the scope of phosphate fertilizer movement in about 1cm. The characteristics of phosphate fertilizer and fertilization technology is very close, whether it is fertilization period, fertilization methods or the amount of fertilizer, have to consider the activity of phosphate fertilizer in the soil. In view of the above situation, we used ~ (32) P to study water-soluble phosphate fertilizer (superphosphate) as fertilizer, top dressing and top dressing in the soils of Inner Mongolia Academy of Agricultural Sciences in 1980, and determined the absorption and utilization of sugar beet.