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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (11): 88-97.doi: 10.11924/j.issn.1000-6850.casb2022-0799

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Response of Potato Climatic Potential Productivity to Climate Change in Black Soil Region and Yield Increase Potential in Dominant Production Areas

LV Jiajia1,2,3(), LIU Song4, LI Yuguang5, GU Ping6, HAN Junjie1,2,3, GONG Lijuan1,2,3, WANG Ping1,2,3, LI Xiufen1,2,3()   

  1. 1 Innovation and Opening Laboratory of Eco-meteorology in Northeast China, CMA, Harbin 150030
    2 Meteorological Academician Workstation of Heilongjiang Province, Harbin 150030
    3 Forestry Department of Heilongjiang Province Institute of Meteorological Sciences, Harbin 150030
    4 Meteorological Data Center of Heilongjiang Province, Harbin 150030
    5 Heilongjiang Eco-meteorological Center, Harbin 150030
    6 Heilongjiang Ecological Environment Monitoring Center, Harbin 150056
  • Received:2022-09-13 Revised:2022-12-03 Online:2023-04-15 Published:2023-04-10

Abstract:

Revealing the temporal and spatial evolution of potato climatic potential productivity in Heilongjiang Province, clarifying the effects of climate change, and understanding the yield increase potential of the dominant potato producing areas can provide basic reference for optimizing potato production layout and ensuring food security in black soil region. Based on daily meteorological data of 80 weather stations and the potato yield data in Heilongjiang Province from 1961 to 2020, the spatial and temporal variations of potato productivity were assessed through a step-by-step correction method, and the influential effects of the main climate change factors of radiation, air temperature and precipitation were quantified to optimize potato planting in the west of the Songnen Plain. The results showed that the average photosynthetic, light temperature and climatic potential productivity of potato in Heilongjiang Province from 1961 to 2020 were 28885, 25802 and 13843 kg/hm2, respectively. Photosynthetic, light temperature and climatic potential productivity exhibited insignificant upward, downward and downward trend, respectively, and the trends were consistent with the trends of radiation, temperature and precipitation in the potential growth period. The photosynthetic and light temperature productivity of potato increased gradually from north to south, and the high value area was located in the south of the Songnen Plain and the south of Mudanjiang; the climatic potential productivity decreased from the middle to the periphery; the effects of climate change on potato climatic potential productivity were as follows: the radiation effect was positive, while the combined effects of temperature, precipitation and climate change were mainly negative. For areas with low rainfall in the south of the Songnen Plain, the increase of temperature and precipitation had positive effect on the improvement of potato climatic potential productivity, while for areas with high precipitation in the east of the Songnen Plain, the effects were more harmful than beneficial. Because of the superior climate and land resources in the west of the Songnen Plain, there is still a huge increase potential of yield per unit area in potato planting.

Key words: black soil region, potato, climatic potential productivity, climate change, effect