论文部分内容阅读
我们于1976—1978年应用~(15)N 对氮肥增效剂 CP、ASU 在我省主要水稻土上进行了试验研究。试验采用盆栽、盆栽模拟大田、大田微区和大田小区结合进行。研究结果如下:1.~(15)N 示踪结果表明,在我省几种主要水稻土上水稻对碳铵、尿素的利用率不高,在习惯的分次面施条件下碳铵的利用率一般为24.3—29.5%,土壤固结率为37%,损失量为48%;尿素的利用率一般为31.35—35.52%,固结率47—50%,损失量为20—30%。2.氮肥增效剂的应用效果:试验结果说明增效剂的效果在不同土壤上反应不一致。在我省肥力水平
In 1976-1978, we applied ~ (15) N on the nitrogen and phosphorus builders CP and ASU in the paddy soil of our province. Experiments using potted plants, potted field simulation, Daejeon and Daejeon district combined. The results of the research are as follows: 1. The tracing results of ~ (15) N show that the utilization rate of ammonium bicarbonate and urea is not high for paddy soils in several major paddy soils in our province, The rate is generally 24.3-29.5%, the soil consolidation rate is 37% and the loss is 48%. The urea utilization is generally 31.35-35.52%, the consolidation rate is 47-50% and the loss is 20-30%. 2. Nitrogen synergist application effect: The test results show that the effect of synergist in different soil reaction is inconsistent. Fertility in our province