关键词: 锥栗, 种仁发育期, 坚果, 淀粉, 矿质元素

Abstract: In order to realize scientific fertilization and achieve high and stable yield，we investigated
changes of main mineral elements（N，P，K，Ca，Mg，Mn，Fe，Zn，and Cu）in developing fruits i.e.
kernel，prickly burs，and pericarp & seed coat，and different type of leaves in‘Changmangzi’. In addition，
dynamic changes of the weight of different tissues of the fruit were also measured. Compared to the
embryo initiation stage，nut weight，kernel weight，and total starch weight in the kernel increased by 6.14
g（92.4%），4.97 g（99.43%），3.82 g（99.92%），respectively，at the stage of nut maturity. Cu contents
in the leaves of bearing branch and the leaves of foliage branch showed a significant decrease tendency，
while P and Zn showed an increase tendency. In the prickly burs，Ca，Fe，and Cu contents had a decrease tendency，while Zn increased at the early stage and then decreased，and other mineral elements did not
change significantly. In the pericarp & seed coat，N，P，K，Mg and Cu contents had a slight change at the
early stage an then decreased significantly；Ca and Zn increased at the early stage and then decreased. In
the kernel，N，P，K，Ca，Mg，Mn，Fe，Zn，and Cu contents had a decrease tendency，while their gross
had an increase tendency. The total starch in the kernel was significantly and negatively correlated with the
contents of Cu in the leaves of bearing branch，the leaves of foliage branch，and the prickly burs，and the
contents of K，Mn in the pericarp & seed coat，while significantly and positively correlated with the
contents of N，P，K，Mg，Mn，Fe，Zn，and Cu in the kernel.

Key words: chinkapin, kernel development period, nut, starch, mineral elements