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

doi:10.11924/j.issn.1000-6850.casb2022-0799

Abstract

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

LV Jiajia, LIU Song, LI Yuguang, GU Ping, HAN Junjie, GONG Lijuan, WANG Ping, LI Xiufen. Response of Potato Climatic Potential Productivity to Climate Change in Black Soil Region and Yield Increase Potential in Dominant Production Areas[J]. Chinese Agricultural Science Bulletin, 2023, 39(11): 88-97.

Figures/Tables 11

References 26

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参数	意义	取值
S	作物光合固定CO₂能力的比例	0.6
ε	光合有效辐射占总辐射的比例	0.47
φ	光合作用量子效率	0.224
α	作物繁茂群体反射率	0.06
β	作物群体透射率	0.1
ρ	非光合器官截获辐射比例	0.1
γ	超过光饱和点光的比例	0.01
ω	呼吸消耗占光合产物的比例	0.3
F(L)	作物叶面积动态变化订正值	0.56
E	作物经济系数	0.75
q	单位干物质含热量	18
η	成熟谷物含水量	0.14
ξ	植物无机灰分含量比例	0.08

参数	意义	取值
S	作物光合固定CO₂能力的比例	0.6
ε	光合有效辐射占总辐射的比例	0.47
φ	光合作用量子效率	0.224
α	作物繁茂群体反射率	0.06
β	作物群体透射率	0.1
ρ	非光合器官截获辐射比例	0.1
γ	超过光饱和点光的比例	0.01
ω	呼吸消耗占光合产物的比例	0.3
F(L)	作物叶面积动态变化订正值	0.56
E	作物经济系数	0.75
q	单位干物质含热量	18
η	成熟谷物含水量	0.14
ξ	植物无机灰分含量比例	0.08

生育期	T_l/℃	T_h/℃	T₀/℃	K_c
播种—出苗	5.0	28.0	14.0	0.19
出苗—分枝	7.0	29.0	18.0	0.42
分枝—开花	10.0	30.0	19.0	0.87
开花—可收	2.0	30.0	17.0	0.94

生育期	T_l/℃	T_h/℃	T₀/℃	K_c
播种—出苗	5.0	28.0	14.0	0.19
出苗—分枝	7.0	29.0	18.0	0.42
分枝—开花	10.0	30.0	19.0	0.87
开花—可收	2.0	30.0	17.0	0.94

生产潜力	最高值	最低值	平均值	气候倾向率
光合生产潜力Y_Q	32879	20899	28885	30.8^*
光温生产潜力Y_T	28707	18537	25802	-72.8
气候生产潜力Y_W	15630	10860	13843	-150.2