在过去的10年中,马来西亚每年更新和新种植的橡胶约4万公顷左右,这样的种植规模年需苗木约1700万株,包括芽接桩,大树桩和袋育苗等不同类型的种植材料。要准备这些材料,每年需采集种子约2300万粒。 然而这些年来,主要由于座果低和落果,致使种子产量普遍减少。对此曾提出过多种原因:气候条件以及有关管理方面 In the past 10 years, about 40,000 hectares of rubber have been renewed and newly planted each year in Malaysia. Such planting requires about 17 million seedlings per year, including various types of planting materials such as spruce pile, big tree stump and bagging seedling. To prepare these materials, about 23 million seeds need to be collected each year. However, over the years, there has been a general decrease in seed production, mainly due to low fruit set and fruit drop. There have been many reasons for this: climatic conditions and related management aspects