1. Evaluation of potassium absorption efficiency on watermelon in seedling stage and screening of efficient genotypes.
- Author
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WU Ping, DONG Ya, WANG Shuo, DONG Caixia, REN Lixuan, ZHANG Yong, and SHEN Qirong
- Abstract
[Objectives] Potassium efficient absorption is beneficial to yield and quality of watermelon. It is significant on screening potassium efficient genotypes of watermelon for resource utilization and efficient potassium mechanism research. [Methods] Thirty three popular watermelon cultivars in practice were selected to screen efficient potassium genotypes. Pot experiment was carried out to screen potassium efficiency genotype and inefficiency genotype on both low and high potassium application. Small type and big-mid type watermelons were selected respectively. [Results] Potassium efficiency could be estimated by potassium absorption of watermelon seedling on the condition of low and high potassium supply. Potassium content made great contributions to potassium absorbing capacity. 'Xiaoxiacheng' 'Xinlan' 'Zaochunhongyu' of small type genotypes and'Heijuba' 'Tedatainongbahao' and' Xinheilongwang' of big-mid type genotypes were dual efficient potassium genotype. 'Jintong' 'Huangxiaoyu-H' of small type genotypes and 'Ping87-14' and 'Kangbingdilei' of big-mid type genotypes were dual inefficient potassium genotypes. Potassium acquisition of high efficient 'Xiaoxiacheng' was higher by 202.7% and 280.0% than that in inefficient 'Jintong' at low and high potassium application, respectively. Potassium acquisition of high efficient 'Heijuba' was higher by 287.4% and 77.1% than that in inefficient 'Ping 87-14' at low and high potassium application, respectively. Cluster analysis by potassium absorption, potassium utilization index and potassium transfer ratio showed that 'Zaochunhongyu' and 'Xinlan', 'Xinheilongwang' and 'Heijuba', 'Zaojia84-24' 'Ping87-14' and 'Kangbingdilei' were similar, respectively. [Conclusions] Potassium absorption efficiency of watermelon could be estimated by potassium acquisition and potassium content. Both potassium absorption efficiency and cluster analysis showed that 'Xiaoxiacheng' of small type watermelon and 'Heijuba' of big-mid type watermelon were efficient genotypes, while 'Jintong' of small type watermelon and 'Ping 87-14' of big-mid type watermelon were inefficient genotypes. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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