Journal of Northern Agriculture ›› 2023, Vol. 51 ›› Issue (5): 40-50.doi: 10.12190/j.issn.2096-1197.2023.05.04

• Soil and fertilizer · Physiology and biochemistry • Previous Articles     Next Articles

Effects of drought on the growth and yield of different potato varieties

LI Baocheng1,2,3, KANG Wenqin2, REN Yongfeng2,3, ZHANG Dejian1, LI Juan1, ZHANG Xiangqian2, ZHAO Zhiyuan4, HAN Yunfei2,3, ZHANG Le2,3, SAN Xintong2,3   

  1. 1. College of Life Sciences,Inner Mongolia University,Hohhot 010070,China
    2. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
    3. Inner Mongolia Key Laboratory of Dry Farming Agriculture,Hohhot 010031,China
    4. Inner Mongolia Autonomous Region Agricultural and Animal Husbandry Technology Extension Center,Hohhot 010000,China
  • Received:2023-07-06 Online:2023-10-20 Published:2024-01-04

Abstract:

【Objective】To investigate the effects of drought on the growth,yield of different potato varieties and evaluate their drought resistance.【Methods】Plant height,stem diameter,leaf area index,chlorophyll content(SPAD value),dry matter accumulation,root-shoot ratio and yield were measured for 8 potato varieties treated with normal irrigation and drought stress. Using principal component analysis and membership function method,the comprehensive drought resistance measure(D) was calculated. The drought resistance of different potato varieties were then comprehensively evaluated.【Results】Under drought stress,the plant height,stem diameter,leaf area index and yield of the different potato varieties were all lower than those of normal irrigation treatment,while SPAD values were higher. The indexes of Dafeng No. 10 and Xisen No. 6 had no significant differences with normal irrigation treatment or small decreases,while the indexes of Luyin No.1,Dafeng No. 9 and Jizhangshu No. 12 were significantly lower than those of normal irrigation treatment. Different varieties had clear differences in the indexes. Xisen No. 6 had the best plant height and stem diameter of 64.20 cm and 12.63 mm,respectively. Luyin No. 1 had the lowest plant height of 49.53 cm. Jizhangshu No. 12 had the smallest stem diameter of 10.13 mm. Huasong No. 7 had the highest SPAD value of 53.03,while Jizhangshu No. 12 had the lowest at 39.73. Dafeng No. 10 performed best in leaf area index,dry matter accumulation,root-shoot ratio and yield of 1.88,170.80 g/plant,0.12,and 34 750 kg/hm2,respectively. Jizhangshu No. 12 had the worst leaf area index,root-shoot ratio and yield of 0.94,0.08,and 18 750 kg/hm2. At 121.78 g/plant,Dafeng No. 9 had the lowest dry matter accumulation. Dafeng No. 10 and Xisen No. 6 had high drought resistance indexes of 0.986 and 0.756,respectively. Two principal components were obtained through principal component analysis:the first contributed 57.807% and the eigenvalue was 5.203,and the second contributed 20.281% and the eigenvalue was 1.825. Under drought stress,the comprehensive drought resistance measure of Dafeng No. 10 was the largest,1.000.【Conclusion】Based on the growth,yield,and the comprehensive drought resistance measure of different potato varieties,Dafeng No. 10 showed strong drought resistance.

Key words: Potato, Drought stress, Growth indexes, Yield, Drought resistance

CLC Number: 

  • S532