花铃肥是棉花一生中施肥较多、较集中的一次。试验结果表明，花铃肥施用是否得当，会直接影响棉花的产量高低和品质优劣。在本试验条件下，以亩施纯氮７．５公斤的用量为适宜，表现早熟、高产、优质，较亩施纯氮１２．５、１５公斤的增产１５，９６％、２３．２７％；前期收花量（１０／３１前）较亩施纯氮 １２．５、１５公斤的增产 ３２．６７％、５４．８２％。在 ０～７．５ 公斤／亩的施氮量范围内，棉花纤维品质随施氮量的增加而提高；亩施纯氮１５公斤的处理纤维品质较差。花铃肥用量过多，既增加了成本，又导致减产。效益降低，是不可取的。 Flower boll fertilizer is more fertilizer throughout the life of cotton, more concentrated time. Test results show that the application of flower boll fertilizer is appropriate, will directly affect the level of cotton production and quality advantages and disadvantages. Under the test conditions, with the amount of 7.5 kg of pure nitrogen per acre applied as appropriate, the yield was 15.6% and 23.27% higher than that of 12.5 and 15 kg of pure nitrogen, respectively. The amount of pre-harvest (10/31 before) than the pure nitrogen fertilizer 12.5,15 kg yield 32.67%, 54.82%. Within the range of 0 ~ 7.5 kg / mu nitrogen application, the quality of cotton fiber increased with the increase of nitrogen application rate; the quality of treated fiber of 15 kg Mushu pure nitrogen was poor. Flower boll consumption too much, both increased costs, but also led to cut. Reduced benefits are not desirable.