海桑育苗技术及其幼苗生长规律的研究

The Studies on Seedling Nursing Techniques of Sonneratia carseolaris and Its Seedling Growth Rhythm

对红树植物海桑采种期、播种与育苗技术，幼苗生长规律及其与主要环境因子的关系进行研究。结果表明：海南省东寨港海桑采种期以第一次果成熟的７～８月份为最佳；用本土（海泥）和客土（营养土）均可作床播种，但移植时后者比前者苗高提高２６．８％；容器育苗基质以配制营养土为最佳，培育的苗木粗壮，出圃时苗木合格率高达９８．４％，海泥其次，红壤土最差；苗高与地径年生长过程具较明显的后期生长，变化规律可用Ｙ（ｔ）＝１／（ａ＋ｂｅ－ｔ）曲线方程表达；

The paper deals with seed collection period,seed sowing,seedling nursing techniques,seedling growth rhythm and essential environmental factors on Sonneratia carseolaris .The results have shown that July to August are the best period for the seed collection in Dongzhai Harbor of Hainan Province.Both sea mud and nutritive soil can be used for sowing bed,but the latter seedling height was 26.8% higher than that of the former before transplanting.The best container substrate is the mixed nutritive soil,on which, the seedlings grow very well and the seedling certified rate can reach to 98.4% when lifted from nursery, the sea mud that is short of phosphorus is the second,and the red soil that is short of nutriment is the third.The anaphase growth has evidently presented in the annual growth period of seedling height and basal diameter,and the growth rhythm can be analyzed by the equation Y(t)=1/(a+b e -t ) .It has been revealed by using grey relation analysis method that the sea water saltness and rainfall are the essential environmental factors affecting the seedling growth.