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应用放射性磷矿粉(昆阳矿)和放射性过磷酸钙在浅色草甸土(石灰性冲积物母质)、黄褐土(弱酸性下蜀黄土母质)、及红壤(第四纪红色粘土母质)进行了盆栽试验,试验是在肥料与土壤均匀混合的条件下进行的。X-射线衍射鉴定及放射化学分析证明,磷矿粉经过反应堆处理后,其晶体构造未变,在施用时磷矿粉放射强度的衰变规律与P~(32)相符合。试验结果说明,在含磷比较充足的浅色草甸土上,单独施用磷矿粉虽然并不使小米产量增加,也不提高小米植株中的含磷百分数,但是作物中所含的磷素,仍然有35%是从磷矿粉中摄取而来。当磷矿粉与过磷酸钙混合施用时(每盆加磷矿粉5.64克和过磷酸钙0.90克),在红壤中,黄豆和荞麦的磷有80%以上来自磷矿粉,而来自过磷酸钙和土壤者只分别占4～7%和15%左右。在酸性黄褐土(小粉土)上施用磷矿粉和过磷酸钙混合肥料时,也起增产作用,小米中的磷有12%来自过磷酸钙,34%来自磷矿粉,54%来自土壤。在含磷酸钙363ppm的浅色草甸土中,小米所摄取的磷素只有18%来自磷矿粉,而来自过磷酸钙和土壤的各约占40%。这时磷肥没有使作物增产。当土壤与磷肥均匀混和时,在浅色草甸土和黄褐土中小米各个生长时期对土壤、磷矿粉和过磷酸钙的磷素吸收率,保持相当稳定的比例。但是在红壤中,黄豆和荞麦在生长后期所摄取的磷素,几乎全部来自磷矿粉,虽然在早期只占25—50%。用放射性磷矿粉与有机肥相混合,进行了小麦的砂培试验。一组经过培育腐解以后施用,另一组临时混和施用。结果证明有机肥的腐解过程并不能对磷矿粉的活度起增进作用。培育腐解后的混合肥料或临时混和的,既不使小麦产量较单施有机肥者有所增加,也不使植株的含磷百分数有所提高。
Application of radioactive phosphate rock (Kunyang mine) and radioactive superphosphate on pale meadow soil (calcareous alluvium), yellow cinnamon (weakly acidic loess parent), and red soil (Quaternary red clay parent ) Were potted experiment, the test is carried out in the fertilizer and soil evenly mixed conditions. The results of X-ray diffraction and radiochemical analysis showed that the crystal structure of phosphate rock did not change after the reactor was treated. The decay law of the emission intensity of phosphate rock coincided with P ~ (32). The results showed that phosphorus alone could not increase the yield of millet or increase the percentage of phosphorus in millet plants on the light-colored meadow soil with adequate phosphorus content. However, the contents of phosphorus, There are still 35% from the phosphate rock ingested. When phosphate rock is mixed with superphosphate (5.64 grams per pot plus 0.90 grams of superphosphate), in red soils, more than 80% of the phosphorus in soya and buckwheat comes from rock phosphate and from superphosphate Calcium and soil accounted for only 4 ~ 7% and 15% respectively. Phosphorus and superphosphate fertilizers also play a role in yield enhancement when applied to acidic yellowish brown earth (small silt) with 12% of the phosphorus in the millet coming from the superphosphate, 34% from the rock phosphate and 54% coming from soil. In the pale meadow soil containing 363 ppm calcium phosphate, only about 18% of the phosphorus uptake by millet comes from rock phosphate and about 40% from the superphosphate and soil. At this time, phosphate fertilizer did not increase crops. When the soil was uniformly mixed with the phosphate fertilizer, the phosphorus uptake rate of soil, phosphate rock and superphosphate in each of light-colored meadow soil and yellow cinnamon soil was maintained at a relatively stable ratio. However, in red soil, almost all of the phosphorus uptake by soybeans and buckwheat during the later stages of growth comes from rock phosphate, though it accounts for only 25-50% in the early stages. Radioactive rock phosphate and organic fertilizer were mixed, the wheat sand culture test. One set of fertilizers after the decomposing application, another set of temporary mixed application. The results show that the decomposing process of organic fertilizer does not play an active role in the activity of phosphate rock. Fostering combustible compost or temporary blending does not result in an increase in the yield of wheat over that of organic fertilizer alone, nor does it increase the phosphorus content of plants.