一种新型硅肥在两系杂交水稻上的增产效果研究

采用多点田间试验,研究了在江淮、沿江地区增施新型硅肥对两系杂交稻产量的影响。结果表明,增施新型硅肥能够显著提高两系杂交水稻产量、优化产量结构并提高水稻抗性。当硅肥施用量从3 000 g/hm~2增加到12 000 g/hm~2时,产量增幅从2.76%提高到7.84%;水稻移栽后35 d,硅肥施用量为7 500 g/hm~2时,产量较对照显著提高6.2%,茎蘖成穗率达到67.3%,显著高于对照,结实率较对照提高3.2%,达到显著水平;增施新型硅肥后稻瘟病、稻曲病、纹枯病和二化螟等主要病虫害发病率显著下降,第1~4节间长度缩短0.15~0.85 cm,第2、3节茎秆壁增厚,提高了两系杂交稻的抗倒能力。

Effect of a new type silicon fertilizer application on yield of two-lines hybrid rice

Multipoint field experiment was conducted to study the effect of application of new type of silicon fertilizer on two-line hybrid rice yield in Jianghuai area. The result showed that silicon fertilizer application significantly improved the rice yield, optimized the structure of yield and raised the desease resistance. The yield increased from 2. 76% to 7.84% when the amount of silicon fertilizer applied increased from 3000 g/hm2 to 12000 g/hm2 . The yield and seed setting rate significantly increased by 6.2% and 3.2%, respectively. The percentage of earring-tillers was 67.3% and significantly higher than that of control. The main pest and diseases of rice such as blast disease, rice false smut, banded sclerotial blight and rice stem borer decreased significantly after applying silicon fertilizer. The length of 1th ~4th internode of rice shortened by 0.15~0.85 cm. The basal stem wall of 2nd and 3rd internode thickened. So the lodging resistance of two-line hybrid rice was improved.