【摘要】 番茄对大量元素的吸收数量和比例是K>NO₃—N>Ca>P>Mg,坐果以后,钾素的吸收比例显著增大。果实形成期是番茄一生中营养元素最大吸收期。营养元素吸收量随环境中N/K比的增大而减少。幼苗3叶期以前,对硼比较敏感,随营养液中硼浓度增加,营养元素、特别是磷的吸收受到抑制,但5叶期以后,对硼的耐受能力增大。成苗移植后,适宜浓度的硼可促进番茄对营养元素的吸收,尤以钾素为显著,并可改善体内的碳、氮代谢。更多还原

【Abstract】 1, The amount and proportion of nutrient absorbed by tomato were considerable difference in the order of K>NO₃ -N>Ca>P>Mg. The proportion of K absorbed by tomato after fruit setting has increased remarkably. The period of fruit-formation are most important stage in plant nutrition.2, An increase in ratio of N/K in the nutritive environment to be followed by a decrease in amount of nutrient absorbed.3, The tomato are sensitive comparatively to Boron before three-leaf stage, the absorption of nutritive element was inhibited with the increase in B concentration. The endurance to Boron has raised after five-leaf stage.4, The considerably higher amount of N,P,K absorbed by tomato was observed in the conditions of 1. 0².0/μgg^-1 B during the growing period after transplanting, and the content of non-protien-N are lower, content of soluble sugar and sugar-nitrogen ratio are higher in leaves and/or stems, and the content of NO₃ -N in juice of petioles are lower in treatments of 1. 0². 0/μgg^-1 B compared with treatments of 0. 2⁰. 5μgg^-1 B, it showed that B is advantageous to nutritive absorption and metabolism of carbon and nitrogen of tomato.更多还原