不同产量水平橡胶品种幼树的氮磷钾营养差异研究

Difference in N,P,K among rubber tree cultivars with different yield components

以7个不同产量水平橡胶品种1年生幼树为材料,研究了橡胶幼树的氮、磷、钾营养差异。结果表明:橡胶品种的产量水平与养分水平之间不存在显著相关性,在供试的7个橡胶品种中,以中低产量品种保亭3406和胶木兼优品种热垦525的叶片氮磷钾含量最低;除不施肥处理橡胶幼树叶片的磷含量随种植时间的延长而增加外,氮、钾含量均表现为8月份最高;此外,与不施肥处理相比,施肥处理橡胶幼树叶片的氮磷含量上升、钾含量下降,其中所有品种的叶片氮含量均极显著增加,保亭3406的叶片磷含量显著增加、其他品种极显著增加,热垦525的叶片钾含量显著减少、其他品种则极显著减少。

The difference in mineral nutrition was studied for seven rubber tree cultivars with different yield components. The results ＇obtained were as follow： No significant difference in correlation was found between different yield components and nutrient content. In the seven varieties, the N,P,K content of the leaf in the low yield （Baoting3406） and the Timber latex （Reken525） were lowest. In the different months, the change of nutrient content was similar besides the unfertilized varieties of P, the nutrient contents were higher in August, but the unfertilized varieties of P was always increased. Compared the fertilized to unfertilized varieties, the content of N,P was increased by fertilized, but the content of K was decreased. There is extremely difference in N,P,K among varieties which using fertilizer. But someone about Baoting3406 was significant difference in P and Reken525 was significant difference in K.