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试验内容是在不同施肥量和施用时期条件下,研究硝酸铵和硫酸铵的氮素平衡以及硝化抑制剂对土壤和肥料氮素损失的影响。试验用渗滤器进行。圆柱状容器的土地面积为0.2平方米,装土255公斤。保持原土壤层次:耕作层25厘米,过渡层15厘米,沉积层45厘米。供试土壤为生草灰化中壤土,盐提 pH5.6,全氮量144毫克/100克土,有效 P_2O_612.4毫克/100克土,有效 K_2O 26.0毫克/100克土。装盆前对耕作层按全部水解酸量施用了石灰。标记氮肥施用期:玉米在春播前租7—8叶期,冬黑麦于早春和孕穗初期。施肥量为硝铵80和160
The content of the experiment is to study the nitrogen balance of ammonium nitrate and ammonium sulfate and the effect of nitrification inhibitor on the nitrogen loss of soil and fertilizer under different fertilizer rates and application time. The test was carried out with a percolator. Cylindrical containers of land area of 0.2 square meters, earth 255 kg. Maintain the original soil level: tillage layer 25 cm, 15 cm transition layer, sediment layer 45 cm. The test soil was grass loamy ashing loam, the pH of the salt was raised to 5.6, the total nitrogen content was 144 mg / 100 g soil, the effective P_2O_612.4 mg / 100 g soil and the effective K_2O 26.0 mg / 100 g soil. Plows were applied to the tillage layer by the total amount of hydrolysed acid applied before the trough. Marking Nitrogen fertilization period: corn in the spring before sowing 7-8 leaf stage, winter rye in early spring and booting early. Fertilizer amount of ammonium nitrate 80 and 160