小省藤苗木生长对遮阴和施肥的响应

为促进优良藤苗的生长，采用L₉（3⁴）正交设计开展施肥试验，探讨其对小省藤苗木生长的影响。结果表明：处理组合的地径、苗高、叶片数和冠幅分别为0.28～0.51 cm、13.5～16.9 cm、1.5～3.4片/株和11.8～16.7 cm，处理组合间呈现极显著或显著差异（P<0.01或P<0.05）；正交9个处理组合的4个指标均极显著地优于对照（P<0.01），遮阴90%与施3 g/株过磷酸钙和0.7 g/株尿素生长最优。遮阴是影响苗高和叶片数的主导因子（R_A>R_C>R_B），影响地径和冠幅的主导因子则是尿素（R_C>R_A>R_B），即小省藤对遮阴和N肥的需求较高。

Growth Response of Calamus gracilis Seedlings to Shading and Fertilization

To promote the growth of fine rattan seedlings, the L9 (34) orthogonal design was applied to find out the effects of shading and fertilization on seedling growth of Calamus gracilis. The results showed that there were significant differences of the basal diameter (0.28−0.51 cm), seedling height (13.5−16.9 cm), leaf number (1.5−3.4) and canopy width (11.8−16.7 cm) between treatment combinations (P< 0.01 orP<0.05); The four indexes of 9 orthogonal treatments were significantly better than those of the control TC (ck) (P<0.01); the optimal levels is under the shade of 90%, 3 g/plant calcium superphosphate and 0.7 g/strain urea. So that shade is the dominant factor of height growth and leaf number (RA>RC>RB), and urea is the dominant factor of ground diameter and crown width (RC>RA>RB). That is showed the light and N fertilizer restrained the growth of C. gracilis seedlings.