几种环境因子对白桦种子出苗率及生长量的影响

Effects of several environmental factors on seed germination and growth of betula platyphylla Suk.

白桦作为一种经济植物和景观植物,具有很高的观赏价值。该文设置基质(A)、光照强度(B)、浇水次数(C)、温度(D)4因素3水平的L^(9)(3×4)正交试验,研究白桦播种育苗条件最佳组合。结果显示:播种时间、基质、光照强度、浇水次数、温度等因素对白桦种子出苗率和生长量影响程度不同。出苗期最佳组合为A_(3)B_(3)C_(3)D_(2),草炭土、珍珠岩、蛭石、腐熟鸡粪混合的基质,光照强度为3000Lx,温度为30℃,分别于每天的9:00、15:00~16:00、19:00浇水,出苗率显著提高,苗高生长最佳组合为A3B2C1D2,即采用草炭土、珍珠岩、腐熟鸡粪混合基质,光照强度为400Lx,每天9:00浇水,温度30℃。

In this paper,orthogonal experiment design was used to study the best combination of Betula platyphylla Suk.seedling.The results showed that sowing time,substrate,shading degree,watering amount and temperature had different effects.The best combination was A_(3)B_(3)C_(3)D_(2).The mixture of peat soil,perlite,vermiculite and rotten chicken manure was selected.The shading degree was 50%,and the temperature was 25℃,watering at 9:00,15:00~16:00 and 19:00 every day,respectively.The seedling rate was significantly improved.