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定植前的准备
非洲菊栽培地点应该具备土层深厚、土质肥沃疏松、光照充足、地下水位低、水电设施完备、交通便利等条件.南方地区可以采用塑料大棚进行栽培,北方地区一般利用日光温室进行栽培. 相似文献
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Zhao ErjingZhang Weijia Lin JunYang Dongjie Havugimana Jean JacquesZhang Jing 《Vacuum》2011,86(3):290-294
ITO thin films were prepared by changing the experimental parameters including gas flow ratio, sputtering pressure and sputtering time in DC magnetron sputtering equipment. The stable experimental parameters of Ar flow at 70 sccm, O2 flow at 2.5 sccm ∼ 3.0 sccm, sputtering pressure around 0.5 Pa, and sputtering time of 80 s were obtained. Under these parameters, we had achieved the ITO thin films with low resistivity (<4 × 10−4 Ω ? cm) and high average transmissivity (95.48%, 350 nm ∼ 1100 nm). These ITO thin films were applied in nanocrystalline silicon solar cells as top transparent conductive layer. The solar cell test result showed that the open circuit voltage (Voc) was up to 534.9 mV and the short circuit current density (Jsc) was 21.56 mA/cm2. 相似文献
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