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| DOI：10.13522/j.cnki.ggps.2019125 |
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| Effects of saline water irrigation on the growing and nutritional quality of sweet and crisp pea under substrate culture |
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FENG Di, ZHU Yuning, ZHOU Ting, ZHANG Jingmin, WANG Zhihe
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1.Facility Horticulture Laboratory of Universities in Shandong/Weifang University of Science and Technology,Weifang 262700, China; 2. College of Horticulture, Hebei Agricultural University, Baoding 071000, China
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| Abstract: |
| 【Objective】The aim of this study is to explore the feasibility of saline water irrigation for soilless cultivation in water-deficient areas.【Method】Sweet and crisp pea was chosen as experimental crop and cultivated in pot with substrate. Five salinity levels of 0.6 (fresh groundwater), 1.6, 2.6, 3.6, 4.6 g/L of irrigation water were designed in this study, with saline water composed by adding NaCl into fresh groundwater in different proportions. Responses of the aerial part, root and nutritional quality of sweet and crisp pea to saline water irrigation were determined. 【Result】When salinity of irrigation water was set to 3.6 g/L and 4.6 g/L, the emergence rate of sweet and crisp pea decreased significantly (P<0.05) by 12.5% and 31.2%, respectively, when compared with fresh water irrigation treatment. The plant height and fresh/dry matter mass of sweet and crisp pea decreased significantly (P< 0.05) with salinity of irrigation water. After 16 days’ sowing, no reduction and difference of dry matter accumulation of roots were obtained for irrigation with saline water of ≤2.6 g/L, while it decreased by 28.9%, 40.5%, 52.2% and 53.1%, respectively, in 1.6~4.6 g/L treatments when compared with freshwater irrigation treatment at 32 days after sowing. Root-shoot ratio increased and the starch content in pea decreased with water salinity. While the content of soluble protein and soluble sugar in pea increased first and then decreased, and the maximum value was obtained in 2.6 g/L treatment. 【Conclusion】 These results implied that irrigation with saline water of ≤2.6 g/L can be used for sweet and crisp peas under substrate cultivation. |
| Key words: sweet and crisp pea; dry matter mass; root-shoot ratio; soluble sugar; soluble protei |
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