施肥与芸苔素内酯对赣无油茶叶片养分和生长的影响

Effect of Fertilization and BRs Application on Leaf Nutrition and Plant Growth of ‘Ganwu’ Clone of Camellia oleifera

为了研究不同类型肥料及不同浓度芸苔素内酯(BRs)在油茶"赣无"优良无性系上的应用效果,选择鸡粪、复合肥、生物有机肥和油茶专用肥以及0.020、0.033 mg/L和0.067 mg/L浓度的芸苔素内酯,采用裂区试验设计,进行连续2 a的试验,在油茶不同生长期调查采样并测定各项指标。结果表明:施复合肥+喷施0.020 mg/L芸苔素内酯油茶高生长最快;施专用肥+喷施0.020 mg/L芸苔素内酯油茶冠幅面积增加最大;喷施0.033 mg/L芸苔素内酯油茶叶片SPAD值最高;施专用肥+喷施0.067 mg/L芸苔素内酯油茶叶片SPAD值增加最多;不施肥+喷施0.067 mg/L芸苔素内酯叶片氮含量最高,其次是施专用肥+喷施0.033 mg/L芸苔素内酯;施有机肥+喷施0.020 mg/L芸苔素内酯叶片磷含量最高;施复合肥+喷施0.020 mg/L芸苔素内酯叶片钾含量最高;施专用肥+喷施0.033 mg/L芸苔素内酯叶片干物质含量最高。

Taking chicken manure, compound fertilizer, bio-organic fertilizer, specialty fertilizer for camellia as basal dressing and BRs with different concentrations of O. 067 mg/L, 0. 033 mg/L and 0. 020 mg/L as top dress- ing according to Split Plot Design method, a two-year experiment was conducted by successive sampling survey at different growing stages and specific indexes measurement to study the effect of applying varied types of fertilizers and different concentrations of BRs on the growth of ‘Ganwu＇ Clone of Camellia oleifera. The results obtained were as follows：The optimal height growth of ‘Ganwu＇ Clone plants was acquired by applying the compound fertilizer plus spraying 0. 020 mg/L of BRs ; the maximum increment of the crown amplitude was got by applying the special- ty fertilizer plus spraying 0. 020 mg/L of BRs. The highest SPAD value was obtained by spraying O. 033 mg/L BRs top dressing; the most increase of SPAD value was got by applying the specialty fertilizer plus top dressing with0. 067 mg/L of BRs. The highest N content in the leaves was got by spraying 0. 067 mg/L of BRs without any fertil- izer application, which was followed by applying the specialty fertilizer plus spraying 0. 020 mg/L of BRs. The highest P content in the leaves was obtained by applying organic fertilizer plus top dressing with 0. 020 mg/L of BRs ; the highest K content in the leaves was realized by applying the compound fertilizer plus spraying 0. 020 mg/L of BRs; whereas the highest dry matter content of leaves was obtained by applying the specialty fertilizer plus top dressing with 0. 033 mg/L of BRs.