杉木种子园产量和品质的影响因子分析

对浙江省５个杉木１代种子园结实，气候和土壤条件进行了多年监测。该地区杉木种子园处子产量和品质的影响因子可总分为生物因子，环境因子和人为因子３个方面。无性系遗传特性是影响种子园产量的基础条件；而种子产量年度变动的首要影响因子是球花授粉不良，其次是病虫危害，两者可造成球果损失６５％左右。生物因子和自然环境因子均是杉木种子产量和品质同影响因子，而人为的栽培管理是提高种子产量和品质的主动影响因子。建园初期

Analysis of the Factors Affecting Output and Quality of Seeds From Chinese Fir Seed Orchard.

Dased on statinary observations on cone setting,climate and soil condition of five Chinese fir seed orchards in Zhejiang Province, there the influence factors of seeding could be divided into three parts; clone's genetic train (or clone's biology),environment, and humans activity (cultivation and management). The clone's genetic train is the basic factor affecting seed production and quality of Chinese fir seed orchard. While the first important factor that makes year's alteration in seed produciton is cone flowering in bad polleination,and the Second is the harm of insects and diseases, both could decrease the seed production about 65%. The fator of human's cultivation and managment is different from else two factors related above, for its initiative and important in improving seed quality and yield condition. The techniques of building the gard at primary period are chiefly as follows: sellecting high genetic gain and will bearing tree clones, and disposing them that are close in flowering within a plot,and choosing the sunny or semi sunny slopes to build the Chineses fir seed orchard where ground is open, terrain slopes gently, and the soil moderate fertility or more. When trees begin to seeding, it is important to pollinate in man made and to control the damage of insects and diseases. Otherwise adequate fertiliaztion and plant thinning must be paid attention to the trees grown in full flourish. Through intensive cultivation and management, man could condition the influence of bad environment to the gard, and so ensure to that a high yield continually.