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在温室条件下,以每桶施用26g N+1.76g P+20g K为对照,进行6个不同硅肥施用水平处理(20,40,60,80,120和150 g/桶)桶栽试验,探讨硅肥对新台22号甘蔗产量构成因素、光合特性、N、P、K和Si的影响。结果表明,大部分硅肥(硅酸钙)处理较对照显著提高甘蔗叶片光合速率、蒸腾速率及气孔导度;不同硅肥处理之间的甘蔗叶片P含量差异不大,部分处理的P含量略有增加;施用硅肥可显著降低叶片N、K含量,但随着硅肥施用量的增加,叶片Si含量逐渐提高。硅肥处理较对照显著提高每桶甘蔗干物质含量(26%～70%)和甘蔗产量(30%～60%)。此外,在收获期,硅肥处理的甘蔗植株硅含量可达2.64%。
Under greenhouse conditions, six barrels of N application level (20, 40, 60, 80, 120 and 150 g / barrel) were used to control the application of 26g N + 1.76g P + Fertilizer Effects on Yield Constituents, Photosynthetic Characteristics, N, P, K and Si of Sugarcane at Xintai No. 22. The results showed that most of the silicon fertilizers (calcium silicate) significantly increased the photosynthetic rate, transpiration rate and stomatal conductance of sugarcane leaves compared with the control. There was no significant difference in the content of P between the different silicon fertilizers, and the partial content of P The content of N and K in leaves increased significantly. However, with the increase of silicon fertilizer application, the content of Si in leaves increased gradually. Compared with the control, the silicon fertilizer treatment significantly increased the dry matter content (26% -70%) and sugar cane production (30% -60%) per barrel. In addition, silicon content of sugarcane plants treated with silicon fertilizers reached 2.64% at harvest time.