[Objective]To explore suitable chemical control period for big peanut.[Method]Shanghua 6 was used as the experimental material to study the effects of the main characters and yield of big fruit peanut under the different chemical control plant height by adopting split area design.[Result]With the increase of chemical control plant height,the main stem height,lateral branch length,total branch number,fruit branch number and mature fruit number per plant of peanut increased in the condition of conventional and high-density.Mature fruit number per plant,yield per plant of conventional density planting were higher than that in high density,while the trend of full fruit rate,kernel percent were the opposite.With the increase of chemical control plant height,the yield showed increasing trend.The yield reached the highest when chemical control plant height was 40 cm.[Conclusion]This study provides a theoretical basis for peanut high-yield cultivation.%[目的]探索大果花生适宜的化控时期.[方法]以商花6号为试验材料,采取裂区设计,研究不同株高化控对大果花生主要性状和产量的影响.[结果]对不同株高化控,花生在常规密度和高密度种植条件下,其主茎高、侧枝长、总分枝数、结果枝数和单株饱果数均随植株化控高度增加而增加;常规密度种植条件下花生的单株饱果数、单株生产力大于高密度种植条件下的植株,饱果率和出仁率则相反;花生无论是常规密度还是高密度种植,其产量均随株高的增加而增加,且花生株高达40cm时,产量最高,化控效果最佳.[结论]该研究为花生高产栽培提供了理论依据.
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