论文部分内容阅读
为了确切地了解碳铵在天津地区的肥效情况,以提高碳铵肥效,我们于1982年利用稳定性同位素~(15)N标记的肥料,对碳铵与其它氮肥品种对玉米的氮素利用率及去向进行了试验研究。一、试验概况试验土壤为重壤质潮土。土壤有机质为1.5％,速效磷30ppm,速效钾170ppm,碳酸盐8％,物理性粘粒(<0.01mm)48％,物理性砂粒(>0.01mm)52％。试验在网室内进行,采用直径20厘米,高30厘米无底铁筒,装15市斤土,每筒施硫酸钾2克,过磷酸钙6克,与土充分混匀,装入筒内,筒埋入地下,顶部与土表相平。试验采用稳定性
In order to understand the effect of ammonium bicarbonate fertilizer in Tianjin and improve the efficiency of ammonium bicarbonate, we used stable isotope ~ (15) N labeled fertilizers in 1982 to study the effects of ammonium bicarbonate and other nitrogen fertilizers on nitrogen utilization rate And whereabouts of the pilot study. First, the test profile The test soil is heavy loamy soil. Soil organic matter was 1.5%, available phosphorus 30ppm, available potassium 170ppm, carbonate 8%, physical clay (<0.01mm) 48%, physical sand (> 0.01mm) 52%. Test in the net room, using a diameter of 20 cm, 30 cm high bottomless iron tube installed 15 pounds of soil, potassium sulfate per cylinder 2 grams, 6 grams of superphosphate, fully mixed with soil, into the barrel, Buried into the ground tube, the top and the earth surface phase. Test stability