Studies on Reproductive Law and Precocity and Prolificacy of Non-astringent Persimmon

The non-astringent persimmon cultivar germplasm bank, including 13 pollination constant non-astringent(PCNA) and 7 pollination variant non-astringent(PVNA) cultivars introduced from Japan and the local non-astringent persimmon cultivar(Luo Tian),has been established since 1987. The biological features and economic traits of fruit crop for the 20 non-astringent persimmon cultivars were investigated. The lzu(early ripening),Jirou(medium maturity),Fuyu and Suruga(late maturity)are larger in fruit size amongst PCNA cultivars. Nishimura is the earliest in fruit maturity and Shougatsu latest in maturity with the largest size fruit in PVNA cultivars. The experimental orchard,densely planted and intensively managed,began to bear fruits 2 years after planting,and produced desirable yield in the third year and reached the highest yield record of 14 987.10 kg/hm2 in the fifth to seventh year.