施肥对省藤移植苗木生长的影响

Effects of three fertilizers on growth of Calamus transplanting seedlings

采用U13(1312)均匀试验设计,探究N、P、K这3种肥料对小省藤和盈江省藤苗木生长性状的影响。结果表明:(1)60 d和120 d时的最大株高分别为16.0 cm和26.0 cm,最大地径分别为5.7 mm和10.6 mm,最多叶片数分别为3片·株-1和4片·株-1。(2)60 d和120 d时的处理组合间平均苗高、地径和叶片数差异均为极显著。(3)2次理论优水平组合均为仅施0.67 g·株-1K肥和2.67 g·株-1P肥的盈江省藤生长最佳,与实际最优水平组合在藤种和P肥水平上一致,N肥保持在低水平。(4)盈江省藤苗木对肥力需求高于小省藤,小省藤生长速度缓慢可能与自身生理特性以及土壤肥力浓度偏高抑制其生长有关,同时K肥对2种省藤影响则不大。

The effects of nitrogen, phosphorous and potassium fertilizers on growth traits of transplanting seedlings of Calamus.nambariensis var. yingjiangensis and C. gracilis seedlings were investigated by adopting U13（13^12） uniform design. The results show that （1） in 60 days and 120 days the transplanted plant height values were 16.0 em and 26.0 cm respectively, the ground diameter values were 5.7 mm and 10.6 mm, the leaf number were 3 and 4 pieces per tree respectively. （2） The discrepancies of average height, diameter and leaf number among 12 treatment combinations were extremely significant. （3） The results of two theoretical optimal level combinations indicated that the seedlings C. nambariensis var. yingfiangensis fertilized 0.67 g potassium per plant and 2.67 g phosphorous per plant grew best, which was consistent with the actual best level combination in species and phosphorous level, and both combinations of N fertilizer maintained at low level. （4） The demand quantity of C. nambariensis var. yingjiangensis seedlings to fertilizers were more than that of C. gracilis, whose growth rate tended to slow may be related with C. gracilis own physiological properties and the growth was restrained by higher concentration of fertilizers. Moreover, the effects of K fertilizer to both Calamus growth were not remarkable.