| Effects of magnesium and potassium fertilization on distribution and ratios of Ca, Mg and K in soil liquid and solid phase in greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2017.06.27 |
| Key Words: magnesium solid phase liquid phase K+/Mg2+ ratio Ca2+/Mg2+ ratio |
| Author Name | Affiliation | | YAN Bo | Shaanxi Land Construction Croup, Xi'an 710000, China
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Ji-chang | Shaanxi Land Construction Croup, Xi'an, Shaanxi 710000, China | | CHEN Zhu-jun | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | CAI Miao | Shaanxi Land Construction Croup, Xi'an, Shaanxi 710000, China | | WEI Yang | Shaanxi Land Construction Croup, Xi'an, Shaanxi 710000, China | | Wang Hui-min | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Huan-yuan | Shaanxi Land Construction Croup, Xi'an, Shaanxi 710000, China |
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| Abstract: |
| To solve the problem of crop magnesium defficiency in greenhouse in Northwest China. This experiment was conducted by different amount of magnisium sulfate fertilizer and potassic fertilizer to study the distribution of Mg and the ratios of Ca2+, Mg2+, K+ in soil liquid and solid phase. The results showed Mg2+ concentration in soil liquid phase were significantly higher in Mg1K2, Mg2K2 treatments compared to control, with an increase of 26.64% and 74.78% respectively. Ratios of Mg2+ in K+, Ca2+, Mg2+ were 32.03%, 31.62%, 32.84% higher in Mg1K2, Mg2K2, Mg2K1 treatments compared to control. More K+ was released from soil solid phase to soil liquid phase by using Mg as fertilizer. Concentration of K+ were decreased by 15.78% and 27.74% respectively in soil solid phase, and were increased by 18.84% and 73.91% respectively in soil liquid phase in Mg1K2 and Mg2K2 treatments. K+/Mg2+ ratios of Mg1K2 and Mg2K2 treatments were 14.52% and 26.61% lower in soil solid phase, while Ca2+/Mg2+ ratios were decreased by 31.51% and 32.29% respectively in soil liquid phase. Concentration of K+ was 69.88% lower and K+/Mg2+ was 20.88% lower in soil liquid phase of Mg2K1 treatment than those of Mg2K2 treatment. Yield of tomato and Mg uptake were elevated with Mg input. |
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