硅肥对浙南山区晚稻的增产效果

Yield-increasing effect of high effective silicon fertilizer on late rice in southern mountain region of Zhejiang province

试验研究了硅肥对浙南山区晚稻生产应用效果及最佳施用量和施用方式。结果表明，在浙南山区晚稻施用硅肥150～450kg／hm^2能增产15％-18．5％，增产的原因是增施硅肥能增强水稻抗逆能力、提高水稻抗病性、有利增加有效穗和千粒重等，并以150kg／hm^2的施用量和以50％基施、50％在水稻孕穗期喷施的施用方法为最佳。

The experiments were carried out to study the effect of high - effective silicon fertilizer application on late rice yield in southern mountain region of Zhejiang province. The most proper rate and method of the application were studied as well. The resuits showed that the grain yield increased by 15% - 18.5% when 150 -450 kg per hectare of high- effective silicon fertilizer was applied to the late - rice, because silicon could improve adversity tolerance and disease resistance of rice and increase spikelet bearing number and 1000 - grain weight. The most proper rate of silicon fertilizer application was 250 kg per hectare, and the most proper application was 50% silicon fertilizer as basal and 50% foliar spray at boot stage.