乌桕(S·sebiferum Roxb.)是我国特有的木本油料树种,桕籽油是重要的工业原料,具有广泛的用途,因而被普遍栽培利用。多年来,在提高乌桕的产量和质量方面有许多研究,但在有关苗木矿质营养方面的研究,还未见报导。因此,我们进行了本项试验,试图寻找乌桕苗期的缺素症状,以及各常量元素对生长的效应,从而为营养诊断、施肥管理、培养壮苗等提供科学依据。 S. Sebiferum Roxb. Is a woody oilseed species endemic to China. Sesame oil is an important industrial raw material and has been widely used for a wide range of purposes. For many years, there have been many studies on improving the yield and quality of the black jackals. However, there has been no report on the research on the mineral nutrition of the seedlings. Therefore, we conducted this experiment in an attempt to find out the deficiency symptoms of Asparagus officinalis, and the effect of each major element on the growth so as to provide a scientific basis for nutrition diagnosis, fertilization management and cultivation of strong seedlings.