沙棘结实规律及其应用的研究

沙棘能源林不仅生产薪材，而且还要利用它的果实生产医用沙棘油和食用果汁，以取得综合效益。作者引用单位生物量的产果量即经济系数作为研究沙棘结实规律的依据，发现同一年龄阶段不同立地条件下的经济系数是接近的，从而使其结实规律的研究在不考虑立地条件的情况下进行。研究表明中国沙棘的结实规律是:Ⅰ龄级为营养生长期，Ⅱ龄级为初果期，Ⅲ—Ⅷ龄级为盛果期，经济系数稳定在20%左右，Ⅸ龄级进入衰果期；沙棘果实中的维生素C的含量有随树龄的增加而增加的趋势，但到盛果期后趋于一致。试验结果为沙棘能源林栽培技术和轮伐期的确定、为不同林

THE STUDY ON THE FRUIT BEARING LAWS OF SEABUCKTHORN PLANTS AND THE APPLICATION

Seabuckthorn energy forest not only produces firewood, the seabuckthorn fruit also can be used to produce medicinal seabuckthorn oil and edible fruit juice to get comprehensive benefit. The writer first quotes the yield per unit biomass, that is economis coefficient, as the basis to study fruit bearing laws of seabuckthorn plants. The study found that the economic coefficients in same age class in different ecological environment are approximate, and this makes it possible the study of fruit bearing laws need not consider the affecting of ecological enviroment. The study of fruit bearing laws of chinese seabuckthorn (Hippophae rhamnoides L. sub. sinensis) shows that, I age class is nutrition growth period, Ⅱ age class is early priod of fruit bearing, Ⅲ～Ⅷ age class is prosperous period of fruit bearing (the economic coefficinets are about 20 percent), after Ⅺ age class is decline period of fruit bearing;with the increasing of plant ages, the amount of vitamin C will increase, but the amount of vi-tamin C tend to approximate after prosperous period of fruit bearing. The results provide theoretical basis for seabuckthorn energy forest cultivation technique, determination of rotation cutting period and fruit of different ages processing and utilization.