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液氨是由合成氨加压液化而成的液体氮肥。含氮量高达82.3%。美国自1947年开始在生产上施用液氨以来,1977年液氨施用量已占全部氮肥施用量的39%。目前液氨的直接施用是施肥技术的重大改革,受到许多国家的重视,已逐渐广泛应用于农业生产。六十年代我国已开展了液氨施用的试验研究,近年来先后在北京、浙江等地进行了大规模的生产试验,对液氨施肥机、施用方法及其肥效等问题进行了探讨,已取得一定结果。认为液氨在小麦、水稻、玉米等作物上的肥效比等氮量的其他氮肥高或者相当。为了给合理施用液氨提供科学依据,我们应用~(15)N 标记的液氨及尿素,研究了液氨对水稻的肥效,测定了液氨的肥料利用率。本文报道1979年的试验结果。
Liquid ammonia is a liquid nitrogen fertilizer made of liquefied synthetic ammonia. Nitrogen content as high as 82.3%. Since the United States began applying liquid ammonia in production in 1947, the liquid ammonia application in 1977 accounted for 39% of the total nitrogenous fertilizer application. At present, the direct application of liquid ammonia is a major reform of fertilization technology, which is valued by many countries and has been gradually applied to agricultural production. In the 1960s, China has carried out experimental studies on the application of liquid ammonia. In recent years, large-scale production tests have been carried out in Beijing, Zhejiang and other places. The problems of liquid ammonia fertilizer applicators, application methods and their fertilizer efficiency have been discussed. A certain result. It is considered that liquid ammonia has higher or equivalent fertilizers than other nitrogenous fertilizers such as nitrogen in crops such as wheat, rice and corn. In order to provide a scientific basis for the rational application of liquid ammonia, we used ~ (15) N labeled liquid ammonia and urea to study the effect of liquid ammonia on rice and determined the fertilizer utilization efficiency of liquid ammonia. This article reports the 1979 test results.