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通过对水稻双株秧在不同施N量和不同栽插密度下的研究，结果表明：以施用90g／m2N肥、栽240苗／m2处理的有效穗和经济产量最高。就有效穗和经济产量两个经济性状来说，施N量和密度间分别存在极显著和显著的互作效应。在施N量低时（如45g／m2），要有较高的栽插密度（如270苗／m2），才有较高的有效稳和经济产量。因此，在施N量低时应加大栽插密度，以保证足够的有效穗。施N量和密度对颖花数、结实率、株高均无显著影响。因此，栽双株秧必须有较高的N肥施用量和适宜的基本苗数，最后才可能有一个理想的产量。
The results showed that the application of 90g / m2 N fertilizer, planting 240 seedlings / m2, the effective panicle and the highest economic yield. For the two economic traits of effective panicle and economic yield, there is a significant and significant interaction effect between nitrogen application rate and density respectively. In the low N fertilizer (such as 45g / m2), have a higher transplanting density (such as 270 seedlings / m2), have a higher effective stable and economic output. Therefore, the application of N should be increased when planting density density in order to ensure adequate effective panicle. N application rate and density on the number of spikes, seed setting rate, plant height had no significant effect. Therefore, planted double plant seedlings must have a higher N fertilizer application and the appropriate number of basic seedlings, and finally may have an ideal yield.