不同种植密度和栽培形式对辽单565光合性能、农艺性状及产量的影响

Effect of Different Planting Densities and Cultivation Methods on Photosynthesis Character,Agronomic Traits and Yield of Liaodan565

以矮秆耐密型玉米辽单565为试材,研究不同种植密度和栽培形式对其光合性能、农艺性状及产量的影响。结果表明,叶面积指数随着种植密度的增加总体上呈增加趋势,当种植密度超过6.75万株/hm2时,宽窄行处理叶面积指数较高。除清种处理外,光合速率随着种植密度的增加总体上呈单峰曲线变化,当种植密度超过6.00万株/hm2时,二比空和宽窄行栽培形式光合速率较高。与穗位叶和穗下叶叶向值相比,穗上叶的叶向值较高。随着种植密度的增加,穗位高逐渐增加,穗长和百粒重逐渐下降。与其他栽培形式相比,大垄双行栽培形式在不同种植密度下茎粗和穗长变化较小,且茎粗表现较好。不同生态区域测产结果表明,栽培形式间和种植密度间均存在极显著差异,栽培形式与种植密度互作极显著,在缩距增密、大垄双行和宽窄行栽培形式基础上,种植密度超过6.00万株/hm2时,辽单565易获高产。

Effect of different planting densities and cultivation methods on photosynthesis character,agronomic traits and yield were conducted with dwarfing high density resistance maize Liaodan565.The results showed that LAI was an increase trend with planting density increased,LAI of wide-narrow row spacing cultivation was higher than that of other cultivation methods,when planting density surpass 6.75×104 plant/ha.Photosynthetic rate was almost express to a single peak curve except for traditional cultivation,which photosynthetic rate of two-one row interval planting and wide-narrow row spacing cultivation methods were higher than that of other cultivation methods when planting density surpassed 6.0×104 plant/ha.Compared with Lov of ear and below ear,Lov of above ear was relative higher.The ear height was an increase trend and the ear length and 100-kernal weight of that were decrease trends with planting density increased.Compared with other cultivation methods,ear diameter was relative higher,which and ear length of that was changed smaller in the double line at one width ridge.The yield result at different ecological zones showed that differences between cultivation methods and planting densities were all quite significantly,the interaction between cultivation methods and planting density was very significant.Yield was easy to obtain high yield when planting density exceeded 6.0×104 plant/ha on the basis of narrow row spacing and short planting spacing,double line at one width ridge or wide-narrow row spacing cultivation.