在批林批孔运动推动下,上海郊区群众性科学实验蓬勃开展,科学种田水平不断提高,农业生产连年丰收。为了迎接一九七五年农业大干快上的新形势,我们试制了一种养分速测盒,采用纸上点滴比色法,测定农作物植株体内氮、磷、钾的含量。通过近两年盆栽和田间试验,点滴测定结果,在一定程度上可以反映作物不同生育期的营养状况,为合理施肥和制订其他栽培措施提供了依据,深受群众的欢迎。 Driven by the pro-Lin Pok campaign, the mass scientific experiments in the suburbs of Shanghai flourished, the level of scientific farming continued to increase, and the agricultural production was bumper year after year. In order to meet the new situation of quickening the development of agriculture in 1975, we experimented with a kit for measuring the rate of nutrient contents in crops using the in-drop colorimetric method. Through the past two years of potted and field experiments, the results of instillation assay can reflect the nutritional status of crops at different growth stages to a certain extent, which provides the basis for rational fertilization and other cultivation measures and is well received by the masses.