Studies on Germination Characteristics and Ex-situ Conservation Growth of Extremely Small Populations Paranephelium hainanense
To understand the ecological adaptability of Paranephelium hainanense,seed germination char-acteristics and wild natural population seedlings and seed seeding were carried out to establish ex-situ conserva-tion bases at the Sanya Academy of Forest,the growth and phenology were observed.The results showed that:(1)GGR,a plant growth regulator at a concentration of 200 mg/L,promoted the germination rate of P.hainanense seeds and increased the seedling survival rate by 43.3％and 92.31％,respectively.(2)Six-year-old growth monitoring showed that the survival rates of the two types of ex-situ protected seedlings were above 95％,and the height and net growth volume of field seedlings and seed seedlings increased first and then de-creased with the increase of seedling age.The average height and diameter of the former were 54.81 cm and 5.89 mm,while the latter were 48.75 cm and 3.72 mm,respectively.During the 3 a-6 a period,it main-tained a significantly high growth,crown growth,and diameter growth.In this study,the seedlings of two nat-ural populations of P.hainanense were protected ex-situ.(3)Through phonological observation,the seedlings of two natural populations of P.hainanense have already blossomed and fruited in the ex-situ reserve.With the first flowering age of 5 years,the flowering period was from the end of February to April,and the fruiting peri-od was from May to July,the flowering period and fruiting period were earlier than those of wild plants.Based on the research results,the ex-situ conservation of P.hainanense has achieved some results.
extremely small populationsParanephelium hainanenseex-situ conservationseed germi-nation characteristicsgrowth
万方数据
维普
