本试验以红花标记杂交棉鲁05 H9为材料，研究不同密度条件下缓控释肥对其生育进程及产量的影响。结果表明：鲁05 H9在不同处理条件下生育进程稳定，施缓控释肥四桃比例更为合理，伏桃和早秋桃所占比例较大；随着密度增大，总产量提高，群体铃数也增加，但单株铃数和平均铃重降低，密度对单株铃数的影响达到显著水平；与常规施肥相比，施缓控释肥可以提高平均铃重，同时影响产量及其构成因素；密度和施肥方式的交互作用对产量及其构成因素的影响未达到显著水平。在产量最高的4．2万株/hm2密度条件下，缓控释肥处理每公顷可以增收472元。因此，综合经济及环保效益，鲁05 H9在黄河流域棉区可以结合较高密度和缓控释肥方式加以推广应用。%With the HB hybrid Lu 05H9 as experiment material, the effects of slow controlled release fertilizer on growth progress and yield of cotton were studied under different densities .The results showed that the growth progress of Lu 05 H9 was stable under different treatment conditions .The treatment with slow con-trolled release fertilizer made the percentage of four kinds of boll more reasonable , and increased the percent-age of summer boll and early-autumn boll .The number of population bolls and total yield increased with the increase of density , but the number of bolls per individual plant and average single boll weight decreased . Plant density had the significant influences on the boll number per plant .Compared with the conventional fer-tilizer, the slow controlled release fertilizer could improve the average weight of single boll , but reduce the yield and its components .The interaction effect of density and fertilizer was insignificant on yield and its com-ponents .The economic benefit could increase by 472 yuan per hectare with slow controlled release fertilizer at the density of 42 thousand plants per hectare .So considering higher economic and environmental benefit , the cultivar Lu 05 H9 could be applied in the Yellow River zone combined with higher density and slow controlled release fertilizer .
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