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微量元素虽在土壤和植物体内含量很少,但却是植物生长发育必不可少又互不可替代的营养元素。然而,近几年来新引进我国的由野生变家化栽培的天然糖源植物甜叶菊施用微量元素效果如何,还未见报导。笔者通过1982—1983年两年试验,初获成效,现简报于下,以供参考。试验设计与方法试验共设计了11个处理:0.1％硼,0.25%硼,0.02％钼,0.05％钼,0.1％锰,O.05％锰,0.2％锌,0.05％锌,O.4%铜,O.02%铜,喷清水(对照)。每亩根外喷施溶液100斤,按小区计量施用。肥源硼用H_3BO_4(B 17％),钼用(NH_4)_6Mo_fO_(24)·H_2O(Mo
Although trace elements in the soil and plants in small amounts, but it is essential for plant growth and development of irreplaceable nutrients. However, in recent years, the introduction of our country by the wild changes in the natural cultivation of sugar plant Stevia rebaudiana trace elements effect of application, has not been reported. The author passed two years of 1982-1983 test, the initial success, is now briefed on for reference. A total of 11 treatments were designed for the experimental design and the method test: 0.1% Boron, 0.25% Boron, 0.02% Molybdenum, 0.05% Molybdenum, 0.1% Manganese, 0.05% Manganese, 0.2% Zinc, 0.05% Zinc, Copper, O.02% copper, spray water (control). Spray the solution per acre outside the 100 kg, according to plot measurement and application. Fertilizer boron with H_3BO_4 (B 17%), molybdenum with (NH_4) _6Mo_fO_ (24) · H_2O (Mo