为明确国审小麦新品种邯麦13号在冀南麦区适期播种（10月10日）条件下的适宜种植密度，设基本苗密度270万、360万、450万、540万和630万株/hm2计5个处理，研究了不同种植密度对小麦产量、产量构成因素、有效分蘖成穗率、收获指数和叶面积指数等主要性状的影响。结果表明：邯麦13号在适播期内播量弹性较大，10月10日播种条件下适宜的基本苗密度为270万～450万株/hm2，其中密度为360万株/hm2时产量最高。并明确了小麦高产的主要原因是收获指数较高、有效分蘖成穗率高、单株次生根条数多、单株干物重高。%To determine the suitable planting density for new wheat variety Hanmai No.13 in southern Hebei Province which sowed in suitable date ( October 10 ) , the effects of different planting densities ( 270 ×10 4 , 360 ×104, 450 ×104, 540 ×104 and 630 ×104plants/hm2) on yield, yield component factors, effective tillering rate, harvest index and leaf area index were studied.The results showed that the seeding rate range of Hanmai No.13 was wide in suitable sowing period.The suitable planting density of basic seedlings was 270 ×104-450 ×104 plants/hm2 while sowed in October 10, and the highest yield was obtained in the planting density of 360 ×104.It determined that the higher harvest index and effective tillering rate , more secondary roots and dry weight of single plant leaded to the high yield.
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