栽培時期によるホウレンソウの無機成分の変動について

根の有用性

抄録

The amounts of inorganic components in cultivated spinach for every term were investigated. Every sample was separated into 3 parts (leaf, stem and root). The spinaches were cultivated for a period of 2 months on a farm with the same soil conditions.After 2 months from sowing, 10 samples of the spinaches were harvested during each November, January and March term. The moisture, ash and inorganic component contents (K, Mg, Ca, Fe, Mn, Zn and Cu) in each sample were analyzed. The results are as follows.
(1) The amounts of the components (K+Ca+Mg) in the spinaches (100g) harvested in November and March were in the order of leaf>root>stem. The order of the January term was leaf>stem>root.
(2) The amount of K was 82.4-97.0% of the components (K+Ca+Mg). The component amounts (K+Ca+Mg) was dependent on that of K.
(3) The amount of Mg shows little difference in any cultivation term or any part.
(4) The amount of components (Fe+Mn+Zn+Cu) in the roots was the highest for any cultivation term.
(5) The amount of Fe in the roots was the highest for any cultivation term.
(6) It was found that the roots of the spinach were valuable as source of the inorganic components.