ギョウジャニンニクの生育に伴う無機成分含有量の変化

Abstract

This study describes the seasonal development and corresponding changes in nutrient content in Allium victorialis L. ssp. platyphyllum Hult.1. Plants elongated rapidly from the sprouting stage to the end of the leafing stage in July; the leaves then gradually shrivelled during the defoliating stage between August and October. After attaining maximum diameter, bulb size remained nearly constant until the defoliating stage. During this stage, small undeveloped sprout leaf continued to elongate. Fresh and dry weights of plants increased proportionately with leaf elongation. After elongation ceased, both fresh and dry weights diminished slightly until September, then they both increased until November.2. The amounts of N and P per plant increased from April to August and remained at this level thereafter. K and Ca contents increased from April through June. With the loss of leaves, the amounts of K and Ca gradually decreased. These results indicate that the plants absorb nutrients actively during the period of rapid growth.3. Each element was most abundant in leaves during the stages of sprouting, flower stalk development, and flowering. The elements were translocated from leaves to the bulbs and roots as the leaves senesced and the bulbs matured. The amount in the undeveloped sprout leaf increased from June to November. Allium victorialis L. ssp. platyphyllum Hult. possess the highest P content among species of Allium.