在美国夏威夷进行温室试验,测定了澳洲坚果的树体需硼量和土壤需硼量。供试土壤采自商盘栽培澳洲坚果的夏威夷,为典型的水成火山灰始成土。试验设10个硼水平(0—32毫克硼/公斤土),定期监测外观症状、叶片干重、叶片硼浓度和土壤溶液的硼浓度,以确定植株对硼处理的反应。澳洲坚果的树体需硼量比其它作物高,叶 Greenhouse experiments were conducted in Hawaii, USA to determine the amount of tree boron and soil boron requirement for macadamia trees. The test soil was collected from Hawaii, a marketplace for macadamia nuts, typical of volcanic ash. Ten boron levels (0-32 mg boron / kg soil) were set up and the appearance symptoms, leaf dry weight, leaf boron concentration and boron concentration of the soil solution were regularly monitored to determine the plant’s response to boron treatment. Macadamia tree needs more boron than other crops, leaves