摘要
采用盆栽试验,通过对5个马铃薯品种(‘V7’、‘大西洋’、‘实验二号’、‘大丰八号’和‘京张三号’)、2个水分条件(保持80%~85%土壤最大田间持水量,3轮干旱-复水)和2个钾肥水平(0 kg·hm^(-2)和180 kg·hm^(-2))的三因素裂区试验,研究不同马铃薯品种的干旱适应性与其钾素营养特性之间的关系。结果表明:各品种马铃薯的干旱适应能力表现为‘实验二号’>‘V7’>‘大丰八号’>‘大西洋’>‘京张三号’,且干旱适应性与钾素营养特性呈显著正相关关系。钾素利用效率、植株钾素吸收量、块茎钾素吸收量和钾素吸收效率对马铃薯干旱适应性的贡献度分别为28.44%、15.08%、14.01%和8.55%。正常水分条件和干旱处理下的马铃薯水分利用效率与钾素利用效率、植株钾素吸收量和块茎钾素吸收量均呈显著正相关关系(P<0.05),且与钾素利用效率的相关性最强,在正常水分条件和干旱处理下相关系数分别为0.97和0.96,推测钾素利用能力强的马铃薯品种可通过提高水分利用效率增强其对干旱的适应能力。研究结果表明,‘实验二号’更适合在北方旱区推广种植。
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.
作者
孙梦晴
叶佳丽
刘溢健
王仕稳
殷俐娜
邓西平
SUN Mengqing;YE Jiali;LIU Yijian;WANG Shiwen;YIN Lina;DENG Xiping(College of Resource and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China;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)
出处
《干旱地区农业研究》
CSCD
北大核心
2024年第4期1-12,51,共13页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(32071974)。
关键词
马铃薯
干旱-复水
钾肥
钾素营养特性
水分利用效率
干旱适应性
potato
drought-rehydration
potassium fertilizer
potassium nutritional characteristics
water use efficiency
drought adaptability
