论文部分内容阅读
一、概况本种加勒比松 Pinus caribaea Morvar caribaea(typical)原产于古巴的那尔—德里奥省西部,松树岛西北部。地理分布为北纬22°10′-22°50′、西经83°13′—84°10′之间。垂直分布,海拔46—335米。广东省林业厅1964年从古巴引进本种加勒比松种子20公斤,分发到湛江、汕头等地造林,这批林木生长良好。佛山林科所1974年,从湛江的母树中,引入优树接穗,共27个无性系,建立搜集圃。次年进行种子园嫁接,以一年生湿地松为砧木,1975—1978年,共嫁接170亩。株行距5×5米,穴状整地,规格为60×60×50厘米,每穴施30斤基肥。其中,1975年嫁接的植株,接后当年林地间
I. Overview The species of Pinus caribaea Morvar caribaea (typical) native to Cuba in the western part of Nuevo-Lírio Province, northwest pine island. The geographical distribution is between latitude 22o 10’-22o 50 ’north and longitude 83o 13’-84o 10’ west. Vertical distribution, elevation 46-335 meters. The Forestry Department of Guangdong Province introduced 20 kg of this species of Caribbean pine from Cuba in 1964 and distributed them to Zhanjiang and Shantou for afforestation. These forests have enjoyed good growth. Foshan Forestry Branch 1974, Zhanjiang from the mother tree, the introduction of superior scion, a total of 27 clones, the establishment of collection nursery. The following year grafting seed orchard, annual pine sip rootstock, 1975-1978, a total of 170 acres of grafting. Plant spacing 5 × 5 meters, hole preparation, specifications for the 60 × 60 × 50 cm, 30 kg per hole fertilizer facilities. Among them, the grafted plants in 1975, then the woodland