Effects of Codonopsis pilosula straw substrate on the yield and economic benefits of potato pre-basic seed in the Northwest arid region
To investigate the impact of traditional cultivation substrate alternatives and new mixed substrates on potato pre-basic seed production,a split-plot experiment was conducted in Dingxi City in 2023.The experiment fo-cused on potato varieties as the main plots with two cultivars:'Longshu No.7' (V1) and 'Jizhangshu No.12' ( V2) .The sub-plots involved 11 different cultivation substrates created by mixing codonopsis stem,peat soil,ver-miculite,and coco peat in various volume ratios:T1 ( 20% Codonopsis+50% peat soil+30% vermiculite ),T2 (30% Codonopsis+40% peat soil+30% vermiculite),T3 (50% Codonopsis+20% peat soil+30% vermiculite),T4 ( 70% Codonopsis+30% vermiculite ),T5 ( 100% Codonopsis ),T6 ( 20% Codonopsis+40% peat soil+40% coco peat),T7 ( 30% Codonopsis+30% peat soil+40% coco peat),T8 ( 50% Codonopsis+10% peat soil+40% coco peat),T9 (60% Codonopsis+40% coco peat),CK1 (100% vermiculite),and CK2 (100% coco peat).The study examined the effects of these different cultivation substrates on the growth,yield,and economic benefits of po-tato pre-basic seed production.The results showed that when Codonopsis stem was mixed with peat soil,vermiculite,or coco peat,the survival rates of virus-free seedlings for 'Longshu No.7' and 'Jizhangshu No.12' ranged from 33.30% to 100.00% and 63.48% to 100.00% respectively.The mix of 20% Codonopsis,50% peat soil,and 30% vermiculite ( T1 ) provided the optimal conditions for 'Longshu No.7 ',achieving the highest total yield,total output,economic benefit,and input-output ratio.Specifically,the total yield,total output,economic benefit,and input-output ratio were 5650.98 kg·hm-2,2.4954 million CNY·hm-2,1.6538 million CNY·hm-2,and 2.97 re-spectively.Compared to CK1,these values increased by 81.04%,60.57%,110.27%,and 47.03%.When compared to CK2,they increased by 74.49%,41.89%,75.73%,and 38.14%.For 'Jizhangshu No.12',the total yield,total output,economic benefit,and input-output ratio were 3950.06 kg·hm-2,1.8032 million CNY·hm-2,0.9616 mil-lion CNY·hm-2,and 2.14 respectively.Compared to CK1,these values increased by 45.32%,18.79%,28.14%,and 8.08%.When compared to CK2,they increased by 56.50%,32.26%,76.18%,and 28.14%.In summary,in-creasing the proportion of Codonopsis stem appropriately in the mixed substrate can effectively promote the growth and development of potato virus-free seedlings,leading to higher yields and economic benefits for potato original seed production.
万方数据
维普
