淮北地区玉米 ‘隆平206’ 适宜密度研究

为明确玉米‘隆平206’在淮北地区的适宜种植密度,为良种配套良法提供依据。采用单因素随机区组设计,研究不同密度对玉米产量、穗部性状和农艺性状等的影响。种植密度在30000-75000株/hm2范围,玉米的产量随着密度的增加而增加,75000株/hm2处理玉米的产量最高;75000-120000株/hm2范围内,玉米的产量随着密度的增加而下降。60000株/hm2、90000株/hm2处理玉米的产量与75000株/hm2处理玉米的产量无显著差异。产量-密度关系符合等比型产量-密度关系的基本特征,玉米产量和密度方程为y=0.31036xe（-0.000012182x）（r=0.994＊＊）,由方程可得,该试验的最高单株生产力不超过310.36 g,玉米最高产量的密度为82085株/hm2,最高理论产量为9372.4kg/hm2。随着种植密度的增加,株高、穗位高显著增高;倒伏率、空秆率显著增大;双穗率显著减少;穗长显著变短;行数显著减少;千粒重显著降低。淮北地区玉米‘隆平206’适宜的密度为60652株/hm2。

The study of suitable density of corn LONGPING 206 in Huaibei district

Abstract: In order to consider a suitable density of corn LONGPING 206 in Huaibei district, the study sets a different level of corn cultivation density and expounds effect between density with corn output, agricultural characters and spike index. In the wake of increase with cultivation density, the result responses to prominent rise of corn height, spike height, area of falling, vacant sticks and prominent descend of corn double spikes, spike length, rows of spikes as well as weight of a thousand seeds. Following with the rise of cultivation density, the corn output increases firstly and then descends prominent. The output is highest in the density of 75000 spikes per hectare, but it is not prominent with the density of 60000 spikes and 90000 spikes. A equation of corn density with yield, Y(Kg/hm2)=0.31036xe(-0.000012182x)(r=0.994**) reveals that the highest yield of a spike is less than 310.36g, the highest yield density is 82085 spikes per hectare, and the yield is 9372.4 Kg per hectare theoretically. The ultimate conclusion shows that a density of 60652 spikes per hectare is optimal in Huaibei district.