摘要
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 aims to clarify the optimum density of‘Longping 206＇variety in Huaibei Area andprovide theoretical basis for supporting the good seed. Field experiment was carried out to investigate theeffects of different densities on yield, agronomy traits and ear characters, and was arranged in a single factorrandomized block design. The results showed that during the density of 30000 to 75000 plants/hm2, with theincrease of density, the yield increased significantly, when the density reached 75000 plants/hm2, the yieldreached maximum; but during the density of 75000 to 120000 plants/hm2, the yield decreased significantlywith the increase of density, but there was no significant difference among the treatment of 75000, 60000 and90000 plants/hm2. The equation of density and yield, y=0.31036xe（- 0.000012182x）（r=0.994＊＊） revealed that themaximum productivity of plant could not exceed 310.36 g, the density of maximum yield was 82085 plants/hm2 and the maximum theoretical yield was 9372.4 kg/hm2. With the increase of planting density, the plant height,ear height, lodging rate and empty stalk rate increased significantly. Double ear rate, ear length, row numberand 1000-grain weight were decreased significantly. The optimum density of‘Longping 206＇in Huaibei Areawas 60652 plants/hm2.
出处
《中国农学通报》
CSCD
2014年第24期167-170,共4页
Chinese Agricultural Science Bulletin
基金
安徽省农业委员会"安徽省玉米振兴计划支撑技术研究"
安徽省农业委员会"安徽省玉米产业技术体系"
安徽省战略性新兴产业项目"优质高产玉米新品种的选育及产业化"(11010301026)
关键词
夏玉米
适宜密度
隆平206
淮北
summer maize optimum density Longping 206 Huaibei
