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1987年用~(15)N 和~(32)P 示踪法研究了掺合肥料的肥效。~(32)P 示踪结果说明,所有掺合肥料处理中作物对肥料磷的利用率为32.4—47.3%。其中氯化铵加磷铵和尿素加磷铵,磷的利用率分别为47.3%和43.6%。而尿素加普钙为32.4%,前者与后者相比差异达极显著水准。~(15)N 示踪表明,作物对所有掺合肥料中氮的利用率为49.2—63.8%,与单施尿素相比,氮肥利用率提高11.9—26.6%,差异极显著。由于水稻对掺合肥料的氮磷利用率提高,产量也相应地提高,与对照相比增产190—249%,与单施尿素相比。增产52.5—83.6%,达极显著差异。
In 1987, the fertilizer effect of blended fertilizer was studied by ~ (15) N and ~ (32) P tracing methods. The results of ~ (32) P tracing showed that the utilization rate of fertilizer P by all crops was 32.4-47.3%. Ammonium chloride plus ammonium chloride and urea plus ammonium phosphate, phosphorus utilization were 47.3% and 43.6%. The urea plus calcium was 32.4%, the former compared with the latter a very significant difference. The trace of ~ (15) N shows that the utilization rate of nitrogen in all blended fertilizers is 49.2-63.8%. Compared with single application of urea, the utilization rate of nitrogen fertilizer increased by 11.9-26.6%, the difference is extremely significant. Due to the increased N and P utilization rate of rice, the yield increased correspondingly with the yield of 190-249% compared with the control, as compared with that of urea alone. Increase 52.5-83.6%, reaching a very significant difference.