叶面施肥对窄叶西南红山茶苗木生长的影响

Effect of Foliage Spray on the Growth of Camellia pitardii var. yunnanica Seedlings

选用尿素和磷酸二氢钾对窄叶西南红山茶苗木进行叶面施肥,采用二因素三水平双向随机区组设计,共设置27个小区进行田间试验,分析不同叶面施肥组合对窄叶西南红山茶苗木生长的影响。结果表明:尿素、磷酸二氢钾配施对窄叶西南红山茶苗高、地径、冠幅产量增加的影响优于单施尿素或磷酸二氢钾,喷施3 g/L的尿素和1 g/L的磷酸二氢钾混合肥对窄叶西南红山茶苗木树高、地径和冠幅的促进作用最为显著。通过交互作用分析,尿素和磷酸二氢钾用量分别为2.718 g/L、1.654 g/L,配比为1∶0.608,对苗高的生长最好,达1.455 cm;用量分别为2.499g/L、1.569 g/L,配比为1∶0.628,对地经的生长最好,达0.068 cm。可根据用苗要求,采用不同配方施肥。

This test analyzed effect of different foliage spray mode on the growth of Camellia pitardii var. yunnan- ica Seedlings. Urea and potassium dihydrogen phosphate sprayed to Camellia pitardii var. yunnanica seedlings by a- dopted the two factors of exercise at three levels design on 27 plots by 2-way randomized block design in field experi- ment. The results showed that combined application of CO（ NH2 ）2 and KHzPO4 in proper ration increased the height, ground diameter, crown breadth of Camellia pitardii var. yunnanica, and the effect was better than single application. Especially, the enhancement was remarkable in treatment 5 when spraying medium dose was 3 g/L of CO（ NH2 ）2 and 1 g/L of KH2PO4. Result of interactive analysis showed that it was the best for the height growth, reaching to 1. 455 cm, when spraying dose of CO（NH2）2 and KH2PO4 were 2. 718 g/L,1. 654 g/L and its ratio was 1：0. 608. While dose of 2. 499 g/L, 1. 569 g/L and ratio of 1：0. 628 was best for ground diameter growth, reaching to 0. 068 cm. Therefore, we could adopt different formula fertilization according to the practical requirement.