母株年龄、气温和降雨频度对蛇皮果萌条生长的影响

Roles of raining frequency, air temperature and mother tree age in growing performance of Salacca zalacca stump plants

蛇皮果萌条是蛇皮果高空压条的基础。为了提高蛇皮果高空压条育苗效率,研究了海南文昌市、澄迈县和定安县3地的母株年龄、气温和降雨频度对蛇皮果萌条生长的影响。结果表明,2年生以下的蛇皮果植株几乎没有萌条,2～3年的蛇皮果植株萌条能力急速上升,17年生蛇皮果母株的萌条生长速度显著小于2～3年生蛇皮果母株。在降雨频度相近且约为0.5时,日最高气温对萌条生长速度有明显的影响,年龄较大的萌条生长速率在气温23～32℃随温度先上升后下降,而年龄较小的萌条呈上升趋势;在气温相差不大时,萌条生长速率均随降雨频度的增加而减少,萌条生长适宜的降雨频度约为0.5。

Stump plant of Salacca zalacca is the base of upper air layering of S. zalacca. In order to study the breeding efficiency, the effects of raining frequency, air temperature and mother tree age on growth of S. zalacca stump plants in Wenchang, Changmai and Dingan of Hainan were investigated. The results show that the Salak plants less than 2-year-old had hardly any coppice shoot, the sprouting ability of 2-year-old and 3-year-old Salak plants rapidly rose and the coppice shoot growth velocity of 17-year-old Salak mother tree was significantly less than that of 2-year-old and 3-year-old Salak mother tree; When the rainfall frequencies of different coppice shoot ages were similar and about 0. 5, the daily maximum temperature had an obvious effect on coppice shoot growth velocity, the growth velocity of the older coppice shoot first increased then decreased within 23℃ - 32℃ , while that of the younger took a rising trend; When the temperature difference was not great, the growth velocity of the coppice shoots deduced with rise of the rainfall frequencies, the suitable rainfall frequency for coppice shoot growth was 0.5.