不同种植密度对江汉平原地区小麦产量的影响

Effects of Different Density on Wheat Yield in Jianghan Plain

为了探寻郑麦9023在江汉平原地区的最适播种密度,设置基本苗120、150、180、210、240、270万/hm2等6个密度水平,探讨了不同播种密度对小麦叶片SPAD值、地上部单茎干物质积累量、穗粒重、产量等的影响。结果表明,叶片SPAD值、地上部单茎干物质积累量以及穗粒重均随密度的增加而下降,且下降幅度呈逐渐加大的趋势,籽粒产量随密度的增加呈先升高后下降的趋势,其中,以基本苗240万/hm2时达最高,产量为5812.5kg/hm2。

Six density levels(1.2,1.5,1.8,2.1,2.4,2.7million/hm2 of basic seedling)were set up to explore the optimum planting density of Zhengmai 9023 in Jianghan Plain.Based on the analysis of the SPADvalues,dry matter accumulation per stem,single spike grain weight and yield.The results indicated that with the planting density increased,the SPAD values,dry matter accumulation per stem and single spike grain weight decreased,and decrease amplitude has a tendency to increase gradually.The yield first increased and then decreased,desity of 2.4million/hm2 obtained the highest yield for the production 5812.5kg/hm2.