种植模式与密度互作对高粱冠层结构及生产潜能的影响

Effects of Planting Pattern and Density Interaction onCanopy Regulation and Production Potential of Sorghum

以辽宁省农业科学院高粱研究所选育品种辽糯22为材料,设置等行距种植与宽窄行种植两种种植模式,97 500株/hm2、10 500株/hm2、11 250株/hm2、12 000株/hm2等4个种植密度,测定分析农艺性状、冠层结构特征、干物质积累、产量及产量构成因素等指标。结果表明,提高种植密度增加了籽粒产量,降低了单穗粒重和千粒重,增加了高粱株高,降低了茎粗、穗长、茎叶夹角和叶片垂直率,与等行距种植相比,宽窄行种植模式叶片空间分布更合理,干物质积累和产量具有明显优势。

In order to explore the effects of planting pattern and density interaction on canopy regulation and production potential of sorghum.In this study,the sorghum research institute of Liaoning Academy of Agricultural Sciences was used as the material,and two planting modes were set up,including equal row spacing planting and wide and narrow row planting,with four planting densities,including 97500 plants/ha,10500 plants/ha,11250 plants/ha,12000 plants/ha,and the agronomic traits,canopy structure characteristics,dry matter accumulation,yield and yield components were measured and analyzed.The results showed that increasing the planting density increased the grain yield,reduced the grain weight per spike and 1000-grains weight,increased the plant height of sorghum,reduced the stem diameter,panicle length,stem-leaf angle and leaf vertical rate,and compared with the equal row spacing planting,the leaf spatial distribution of the wide and narrow row planting mode was more reasonable,and the dry matter accumulation and yield had obvious advantages.