[ Objective] The purpose was to ascertain the suitable planting density of cotton in north Xinjiang. [ Method] With Xinluzao33 as tested cotton variety,the influences of different planting densities of 9.0 × 104, 1.35 × 105, 1.80 × 105,2.25 × 105, 2.70 × 105 and 3.15 × 105 plants/hm2 on its yield traits were studied. [ Result]The growth period of cotton was delayed along with the increase of planting density. Planting density showed significantly negative correlation with the plant height,leaf number,fruit spur nurnber,bud number,boll number,boll weight and fiber yield of cotton. The dry matter accumulation in different organs of cotton was showed as S-type curve and it was fastest in blossing and bollforming stage. When the planting density was 2.25 × 105 plants/hm2 ,the boll weight,fiber yield ,seed cotton and lint yields were highest. [ Conclusion ] The suitable planting density of early-maturity cotton variety in north Xinjiang was 2.25 × 105 plants/hm2.%[目的]确定北疆棉花的适宜种植密度.[方法]以新陆早33为供试棉花品种,研究不同种植密度(9.0、13.5、18.0、22.5、27.0、31.5万株/hm)对其产量性状的影响.[结果]棉花生育期随种植密度的增加而延后;种植密度与棉花株高、叶片数、果枝数、蕾数、铃数、铃重、衣分均呈显著负相关;棉花不同器官于物质积累均呈"S"型曲线,花铃期棉花干物质积累最快;密度为22.5万株/hm处理棉花的铃重、衣分、籽棉和皮棉产量最高.[结论]北疆早熟棉花品种的适宜种植密度为22.5万株/hm.
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