橡胶树树干注输营养液施肥法成效初探

采用树干注射输液法在老龄RRIM600橡胶树上进行相同配比不同浓度的营养液注输施肥试验。连续注输营养液2个月和4个月后分别对各试验处理后橡胶树胶乳的产量和叶片中养分元素含量进行定量分析。结果显示:在本试验条件下,树干注输营养液施肥法对橡胶树的胶乳产量没有显著的影响,但有助于提高橡胶树叶片中营养元素含量。相同配比不同浓度的营养液连续注输2个月后橡胶叶片中大部分养分元素含量均有一定程度的增长,连续注输4个月后各试验处理的差异开始显现。输液后叶片中养分元素增长量最大的溶液配比浓度为:尿素0.1 g/L,磷酸二氢钾6.81 mg/L,硫酸钾50.6 mg/L,硫酸镁34.5 mg/L,硫酸铜1 mg/L,硫酸亚铁1.39 g/L,硫酸锰2 mg/L,硫酸锌1 mg/L,硼酸2 mg/L。

Preliminary Studies on.,Fertilization Effect through Trunk Injection of Nutrient Solution in Hevea Brasiliensis

Trunk injection of nutrient solution fertilization was implemented on aging RRIM600 Hevea brasiliensis with the formulae of the same proportion but different densities. The latex yielding and nutrients content in leaves were recorded respectively after two and four month continuous infusion of different formulae. The results showed, under these scenarios, while trunk infusion fertilization has no significant effect on latex yielding, it has increasing effect on nutrients content in leaves. The nutrients content in leaves are generally increased after two month treatment with formulae of the same proportion but different densities, and significant variations emerged among distinct set of experiments after four month treatment. Thereinto, maximizing the nutrients content increment is the formula as follows： urea 0.1g/L,monopotassium phosphate 6.81 mg/L, potassium sulfate 50.6 mg/L, magnesium sulfate 34.5 mg/L, copper sulfate 1 mg/L, ferrous sulfate 1.39 g/L, manganese sulfate 2 mg/L, zinc sulfate 1 mg/L, boric acid 2 mg/L.