| Relationship between drought adaptability and potassium nutrient characteristics in different potato varieties |
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| DOI：10.7606/j.issn.1000-7601.2024.04.01 |
| Key Words: potato drought\|rehydration potassium fertilizer potassium nutritional characteristics water use efficiency drought adaptability |
| Author Name | Affiliation | | SUN Mengqing | College of Resource and Environment， Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau, College of Soil and Water Conservation Science and Engineering， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China | | YE Jiali | College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau, College of Soil and Water Conservation Science and Engineering， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China | | LIU Yijian | College of Resource and Environment， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China | | WANG Shiwen | College of Resource and Environment， Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau, College of Soil and Water Conservation Science and Engineering， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China | | YIN Lina | College of Resource and Environment， Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau, College of Soil and Water Conservation Science and Engineering， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China | | DENG Xiping | College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau, College of Soil and Water Conservation Science and Engineering， Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation， Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Five potato varieties (V7, Atlantic, Experiment 2, Dafeng 8, and Jingzhang 3) were grown in water combined with potassium fertilizer treatment through a pot experiment. Specifically, we established two water gradients (maintaining 80%~85% of the soil’s maximum field water capacity, three rounds of drought and rehydration) and two levels of potassium fertilizer (0 and 180 kg·hm-2) to invest relationship between drought adaptability and potassium nutrient characteristic in different potato varieties. The results showed that the drought adaptation ability of various potato varieties was ranked as Experiment 2 >V7>Dafeng 8>Atlantic>Jingzhang 3. The drought adaptation ability of varieties was positively correlated with their potassium nutrient characteristics. The contribution of potassium utilization efficiency, plant potassium absorption, tuber potassium absorption, and potassium absorption efficiency to drought adaptation was 28.44%, 15.08%, 14.01%, and 8.55%, respectively. The correlation between water use efficiency and potassium utilization efficiency, plant potassium absorption and tuber potassium absorption were all significantly positively correlated in potato under both normal water condition and drought treatment (P＜0.05). The water use efficiency showed highest correlation ]with potassium use efficiency, with correlation coefficients of 0.97 and 0.96, respectively, under normal water condition and drought treatment. It is assumed that potato varieties with strong potassium utilization ability can enhance their adaptive ability to drought by improving water use efficiency. The research results indicate that, Experiment 2 is more suitable for the popularization of planting in the northern arid areas. |
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