论文部分内容阅读
橡胶的苗期具有特别旺盛的高生长习性,定植时使用壮苗和下足基肥,当年可抽生5～6蓬叶,年终苗高可达200公分以上,这时的茎粗与苗高的比例大约为1:80～100(公分)。翌年春由于顶端生长优势,抑制侧芽萌生,如果不控制其高生长,可长至4～5米高,使胶树高粗比例失调,妨碍茎围的增粗,因为茎围增粗是主要的经济效益。所以在定植的当年要创造条件促其高生长,而在第二年春控制高生长,促使胶苗在适当的高度上分枝,扩大营养面,造就矮、匀、轻、疏的理想树冠。这对于橡胶幼树的速生进而缩短非生产期具有重要的经济价值。
Rubber seedling has a particularly strong high growth habit, when planting strong seedlings and the use of the next foot-based fertilizer, then pumping 5 to 6 Pui leaves, the end of the year-old seedlings up to 200 cm above, when the stem thick and seedling height The ratio is about 1: 80 ~ 100 (cm). The next spring due to the top of the growth of the top growth, inhibition of buds sprouting, if you do not control the high growth, can grow to 4 to 5 meters high, so that the gum height ratio disorders, hinder stem thickening, stem thickening is the main Economic benefits. Therefore, in the year of colonization, conditions should be created to promote its high growth. In the following year, the spring will control the high growth, prompting the seedlings to branch at a proper height, expanding the nourishing noodles and creating the ideal canopy with short, uniform, light and sparse. This has important economic value for the quick growth of rubber saplings and shortening the non-production period.