论文部分内容阅读
龙眼(Euphoria longana Lam.)是我国南方的珍果,栽培面积居世界第一位。鉴于迄今有关龙眼方面的科研资料尚不多,生产中还存在不少问题,我们将1962—1965四年进行龙眼研究的资料整理出来,供参考研讨。材料与方法供试植株为四川省泸州市长江沿岸冲积沙壤土上的实生龙眼树,树龄为60—200年生。根系分布观察用60年生树,冠径6.5×6.4米,距主干1、2、3.5、5、6.5、8米处共挖6道3.5米深的壕沟,进行观测绘图。根系年生长波观察采用改良式大型根窖法,选60年生结果大年树、小年树、连年稳产树分别建立3个根窖,每10天观测一次地上和地下部生长量。
Longan (Euphoria longana Lam.) Is a rare fruit in southern China, the cultivation area ranks first in the world. In view of the fact that there are not many scientific research materials on longan so far, there are still many problems in production. We have sorted out the data on longan studies from 1962 to 1965 for reference. MATERIALS AND METHODS The test plant was a real longan tree on alluvial sandy loam along the banks of the Yangtze River in Luzhou, Sichuan Province, with an age of 60-200 years. Root distribution observed with 60-year-old tree, the crown diameter of 6.5 × 6.4 m, away from the trunk 1,2,3,5,5,6.5,8 m dig a total of 6 3.5-meter-deep trench, the observation plot. Root growth wave observation using a modified large-scale root pit method, selected 60-year-old tree, small tree, perennial stable tree were established three root pits, observed once every 10 days aboveground and underground growth.