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在湘南红壤丘陵水稻种植区,采用田间试验与盆栽试验相结合的研究方法,对第四纪红土发育的红黄泥水稻土施用硅肥研究取得良好效果。即在常规施肥的基础上施用硅肥,分蘖苗增加31.2%,有效穗增加17.1%,水稻产量提高8.2%,差异显著。在水稻生殖生长期施用硅肥,对增加每穗颖花数、减少颖花退化,提高结实率和千粒重均有明显的效果,籽粒重量增加47.7%,效果极显著。
In the southern Hunan red soil hilly rice growing areas, field experiments and pot experiments were used to study the effect of applying silicon fertilizer on the red-yellow paddy soil developed in the lateritic red clay. That is, applying silicon fertilizer on the basis of conventional fertilization, the tillering seedling increased by 31.2%, the effective panicle increased by 17.1% and the rice yield increased by 8.2%, the difference was significant. Silica fertilizer applied in the reproductive growth stage of rice significantly increased the number of spikelets per spike, reduced the spikelet degeneration, increased the seed setting rate and 1000-grain weight. The grain weight increased by 47.7% and the effect was remarkable.