缺素培养对大豆营养生长和根系形态的影响

通过营养液栽培试验,探讨了巴西10号和本地2号两个大豆基因型在氮、磷、钾、钙、镁、硫、铁缺乏条件下的缺素症状和植株生物量变化,以及根系形态指标的改变。结果表明,缺素处理对大豆植株生长影响显著,在各种缺素条件下大豆植株生物量均明显降低,地上部与根部均表现出各种营养元素缺乏时的特有症状;缺氮、缺钾、缺钙、缺镁和缺铁处理时大豆总根长和根表面积也均显著降低。大豆对不同缺素处理的反应存在基因型差异。

Effects of different element deficiencies on soybean growth and root morphology

A hydroponic culture was carried out to study the element deficiency symptoms, plant biomass and root morphology of soybean genotypes, BX10 and BD2, under the N, P, K, Ca , Mg, S, Fe and S deficient treatments. The results show that the element deficiencies have significant effects on soybean growth. Plant biomasses are obviously decreased under the different element deficiency treatments. Both shoots and roots of plants show the specific symptoms under the different element deficiencies. In addition, total root lengths and surface areas are significantly decreased under N, K, Ca, Mg and Fe deficient treatments. The responses of BX10 and BD2 to the element deficiencies show genotypic variation.