The Effect Of Zinc And Boron Micro-Fertilizer Applied In The Soil At The Early Tillering Stage Of New-Planting Sugarcane

The new Taiwan Sugar 22 was used as experiment material in the study. At the early tillering stage of sugarcane, Zinc, boron was used by soil application. In order to study the effect of zinc, boron, zinc + boron on the yield and quality, we analysed the physiological characters of+1 leaves , nourishment characters of+3 leaves , photosynthetic characters and investigated agronomic characters. The results were shown as follow.1. In photosynthetic pigment and photosynthesis: The treatments of zinc, zinc + boron raised chlorophyll a, chlorophyll b, total chlorophyll content, improved the net photosynthetic, transpiration rate, stomata conductance。2. In physiological characters: All the treatments improved NR activity, especially zinc; the treatments of boron , zinc + boron decreased POD activity, but the treatment of zinc is higher than CK at the first stage of sugarcane growth, and lower at the end stage. All treatments improved the acid invertase activity expect the late stage of sugarcane growth. The treatments of zinc , zinc + boronhad active effect on the content of soluble sugar and soluble protein. The MDA content of zinc , boron, zinc + boron were lower than CK.3.In nourishment condition : The treatment of zinc could increase the whole zinc content of+3 leaves, and the treatment of boron increased the whole boron content of +3 leaves, and the treatment of zinc+ boron increased the whole zinc and boron contents of+3 leaves. The treatments of zinc, zinc + boron promoted the whole potassium, phosphoric content of+3 leaves , and the boron treatment improved the whole nitrogen, potassium, calcium contents of +3 leaves. the treatments of zinc, zinc+boron had a little function on the absorption of magnesium。4. In the agronomic characters: Compared with CK, the treatments of zinc, boron, zinc + boron increased tillering rate, the effective stem and the average stem weight, and the treatments of zinc, zinc + boron promoted the stem length.5. In the yield of sugarcane: All treatments improved the actual sugarcane yield. The sequences were zinc + boron> zinc> boron >CK. Compared with CK, the treatments of zinc, boron, zinc + boron increased the yield of per acre by 1.17%, 0.33%, 6.05% respectively .6. In sugar quality : Compared with CK, the treatments of zinc , boron and zinc + boron increased the sucrose of sugarcane by 0.68 %( average value), 0.09 %( average value), 0.41%( average value) respectively. The treatments of zinc, zinc + boron increased the juice gravity of sugarcane by 0.54%( average value)and 1.72%( average value) respectively, but the treatment of boron decreased juice gravity by 0.45%( average value). The treatments of zinc, boron, zinc+ boron increased sucrose yield 76.3 kg/666.7m~2, 13.4 kg/666.7m~2, 91.2 kg/666.7m~2 respectively.7. According to the general comparison , the treatment of zinc + boron was the best of all at the condition of this experiment.