不同育苗基质对油茶良种容器苗生长的影响

Effects of Different Nursery Substrata on the Growth of Container Seedlings From Improved Varieties of Oil-tea Camellia

为了掌握油茶苗木的生长规律,便于采取科学合理的育苗技术,研究了在4种不同育苗基质条件下,油茶幼苗苗高、径粗、叶片数的生长规律,分析了4种育苗基质对油茶生长量的增加是否存在显著性差异.结果表明,4种不同基质条件下油茶生长量变化趋势基本保持一致,但对苗高、径粗、叶片数的生长影响不同,对于苗高来说,泥炭土最好,红壤土次之;对于径粗来说,以红壤土最好,泥炭土次之;对于叶片数来说,以泥炭土最好,红壤土和植得乐营养土次之.在生长期内,幼苗苗高和叶片数月增长呈现出"快—慢—快—慢—停止"的规律,而幼苗径粗增长量相对稳定.通过对苗高、径粗、叶片数之间的相关性研究,结果表明两两之间存在极显著正相关.通过研究生长时间与苗高、径粗、叶片数的关系,分别建立了生长模型.

In order to understand the growth law of oil-tea camellia seedlings and to take technical measures to breed, the paper made a comprehensive study of the seedling height, ground diameter and leaf number of oil-tea camellia under four kinds of nursery substrata, and of the difference of growth increment between the different nursery substrata. Results show that the change trend of growth is homogeneous, but it plays a different role in the growth of seedling height, ground diameter and leaf number; that for seedling height, peat soil is the best and red loam comes the next, for ground diameter, red loam is the best and peat soil comes the next and for leaf number, peat soil is the best, and red loam with nutrient soil named ＂zhidele＂ comes the next ; and that in a growth season, the law of monthly increment of seedling height and leaf number is ＂fast-slow-fast-slow-stop＂ while the monthly increment of ground diameter is relatively stable. A correlation study shows that there is a highly significant, positive correlation among the seedling height, ground diameter and leaf number, and accordingly, a series of growth models are established.