| Response of cucumber growth, yield and quality to different irrigation lower limits in substrate culture |
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| DOI：10.7606/j.issn.1000-7601.2020.05.16 |
| Key Words: cucumber substrate culture irrigation lower limit growth quality yield WUE |
| Author Name | Affiliation | | LV Jian | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | JIN Ning | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YU Jihua | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | JIN Li | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Guobin | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | XIAO Xuemei | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HU Linli | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In this experiment, the cucumber variety, Bote 209, was used as test material, and four irrigation water limit treatments were set in potted medium. They were 50%, 60%, 70%, and 80% of field water holding capacity. The irrigation water limit was set to 90% of field water holding capacity by A, B, C, and D. The effects of different irrigation water limits on the growth, yield, and quality of cucumber under substrate cultivation were studied. In order to evaluate and select the suitable irrigation water limits for cucumber under substrate cultivation more scientifically and reasonably, the principal component analysis was used to evaluate 22 indexes related to the growth, yield and quality of cucumber under four treatments.The results showed that the plant height of treatment D was significantly higher than that of treatment A, B, and C by 56.50%, 22.51%, and 11.04%, respectively. The leaf area of treatment D was also significantly higher than that of treatment A, B, and C by 92.61%, 61.35%, and 27.87%. Compared with treatment A, B, and D, the stem diameter of treatment C was the largest, which increased by 28.36%, 16.91%, and 18.49%, respectively.The single fruit weight, fruit number per plant, yield per plant, and irrigation amount of treatment D were the largest, while the water use efficiency of treatment C was the highest, which increased by 33.14%, 13.23%, and 10.30% compared with treatment A, B, and D.Compared with treatment A and B, the three indexes of treatment C were significantly increased by 19.17% and 10.81%, 0.98% and 0.45%, 66.70% and 18.21%, respectively.The contents of soluble protein and soluble sugar in treatment C were significantly higher than those in other treatments, while nitrate content was significantly lower in treatment C. Compared with treatment A, B, D, the contents of total K and Ca increased by 35.20% and 11.19%, 3.81% and 11.19%, 1.06% and 6.43%, respectively. After principal component analysis and comprehensive evaluation, the scores of the four treatments from high to low were as follows: C, D, B, and A. |
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