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应用放射性同位素评价生物学过程的生命活动,是一种准确而客观的方法。法国利用~(32)P对粉状及颗粒肥料磷进入冬小麦植株的情况进行了研究,结果表明,颗粒肥料磷能较好地被作物吸收。保加利亚用~(32)P进行定位田间试验,研究了磷进入蕃茄植株的效率与土壤养分供给的关系。8年试验表明,每公顷施N、P、K各240公斤时,磷的利用率提高(19.1％),施用过量时,使土壤中无机磷含量大大增加,而肥料利用率则降低到11.4％。进入三叶草和莓系植株中的~(32)P,可以用作土壤供磷水平的指标,当植株缺磷时,示踪磷在这
The use of radioisotopes to assess the biological activity of biological processes is an accurate and objective method. France used ~ (32) P to study the situation of phosphorus and powdered fertilizer entering winter wheat plants. The results showed that phosphorus could be well absorbed by crops. In order to study the relationship between the efficiency of phosphorus in tomato plants and the supply of soil nutrients, Bulgaria (32 P) was used to conduct field experiments. Eight years of experiments showed that the phosphorus utilization rate increased by 19.1% when N, P, K was applied at a rate of 240 kg per hectare. When applied in excess, the content of inorganic phosphorus in soils increased greatly while the fertilizer utilization rate decreased to 11.4% . Into the clover and raspberry plants in the ~ (32) P, can be used as an indicator of soil phosphorus levels, when plants lack phosphorus, phosphorus in this