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本试验利用~(32)P 标记磷酸二钙,研究碳铵和磷酸二钙混合肥和两种单质肥料分施对谷子吸收肥料磷的影响。通过同位素示踪试验证明:当含氮量为1.91%时,氮磷混合肥比单施磷的处理,其磷肥利用率提高31.46%;含氮量为3.59%.5.08%,8.64%和11.28%的氮磷混合肥,磷肥利用率分别比单施磷的处理提高32.96%.62.23%.117.32%和170.46%。但含氮量从1.91—11.28%的碳铵和磷酸二钙混合肥与碳铵和磷酸二钙单质肥分施相比,谷子对肥料磷的吸收利用无显著差异。
This experiment used ~ (32) P labeled dicalcium phosphate to study the effects of ammonium bicarbonate and dicalcium phosphate fertilizers and the application of two kinds of elemental fertilizers on phosphorus uptake of millet. The results of isotope tracing experiments showed that when the nitrogen content was 1.91%, the N and P fertilizers increased the phosphorus utilization rate by 31.46% and the N contents by 3.59%, 5.08%, 8.64% and 11.28% Of nitrogen and phosphorus mixed fertilizer, phosphorus fertilizer utilization rates were increased by 32.96%, 62.23% .117.32% and 170.46%, respectively. However, compared with ammonium bicarbonate and dicalcium phosphate fertilizers, ammonium nitrogen and dicalcium phosphate fertilizers with nitrogen contents ranging from 1.91-11.28% had no significant difference in fertilizer phosphorus uptake.