| 日光温室钾镁配施对土壤固相和液相钾、钙、镁分配及比例的影响 |
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| 引用本文： | 闫波,韩霁昌,陈竹君,蔡苗,魏样,王辉民,王欢元.日光温室钾镁配施对土壤固相和液相钾、钙、镁分配及比例的影响[J].干旱地区农业研究,2017,35(6):181-186. |
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| 作者姓名： | 闫波 韩霁昌 陈竹君 蔡苗 魏样 王辉民 王欢元 |
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| 作者单位： | 陕西省土地工程建设集团有限责任公司, 陕西 西安 710000; 西北农林科技大学 资源与环境学院， 陕西 杨凌 712100 |
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| 基金项目： | 陕西省重点科技创新团队计划项目（2016KCT-23）；陕西省农业攻关项目(2014K01-14-03) |
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| 摘 要： | 针对西北地区日光温室作物出现的缺镁问题,通过施用不同水平的硫酸镁肥及减少钾肥施用处理,探究钾、钙、镁离子在土壤固相和液相的分布及比例。得出以下结论:土壤液相镁浓度随着镁肥施用量的增加而显著增加,施用45 kg·hm~(-2)MgSO_4(400 kg·hm~(-2)K_2O)处理和施用90 kg·hm~(-2)MgSO_4(400 kg·hm~(-2)K_2O)处理镁浓度相比不施用MgSO_4处理分别增加26.64%、74.78%;相比不施用MgSO_4处理,施用镁肥后土壤液相Mg~(2+)占K~+、Ca~(2+)、Mg~(2+)总量的比例显著增加,施用45 kg·hm~(-2)MgSO_4(400 kg·hm~(-2)K_2O)处理、施用90 kg·hm~(-2)MgSO_4(400 kg·hm~(-2)K_2O)处理和施用90 kg·hm~(-2)MgSO_4(200 kg·hm~(-2)K_2O)处理分别增加32.03%、31.62%、32.84%;施用镁肥促进钾由固相向液相转移;相比不施用MgSO_4处理,施用45、90 kg·hm~(-2)MgSO_4处理土壤固相交换性钾含量分别降低15.78%、27.74%,差异达到显著水平;交换性钾饱和度分别降低13.39%、27.21%;液相钾浓度显著增加,分别增加18.84%、73.91%;K+占K+、Ca~(2+)、Mg~(2+)总量的比例显著增加,增幅分别为23.91%、31.21%;土壤固相K+/Mg~(2+)比例分别降低14.52%、26.61%,;土壤液相Ca~(2+)/Mg~(2+)比例显著降低,降幅分别为31.51%、32.29%;施用MgSO_4肥量相同,钾肥施用量减半,土壤液相钾浓度降低69.88%,K+/Mg~(2+)比例降低20.88%;施用镁肥对番茄具有一定的增产作用,并能促进作物对镁的吸收。
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| 关 键 词： | 镁肥 土壤固相 土壤液相 K+/Mg2+比例 Ca2+/Mg2+比例 |
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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| YAN Bo,HAN Ji-chang,CHEN Zhu-jun,CAI Miao,WEI Yang,Wang Hui-min,WANG Huan-yuan.Effects of magnesium and potassium fertilization on distribution and ratios of Ca, Mg and K in soil liquid and solid phase in greenhouse[J].Agricultural Research in the Arid Areas,2017,35(6):181-186. |
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| Authors: | YAN Bo HAN Ji-chang CHEN Zhu-jun CAI Miao WEI Yang Wang Hui-min WANG Huan-yuan |
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| Institution: | Shaanxi Land Construction Croup, Xi''an 710000, China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China,Shaanxi Land Construction Croup, Xi''an, Shaanxi 710000, China,College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China,Shaanxi Land Construction Croup, Xi''an, Shaanxi 710000, China,Shaanxi Land Construction Croup, Xi''an, Shaanxi 710000, China,College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China and 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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| Keywords: | magnesium solid phase liquid phase K+/Mg2+ ratio Ca2+/Mg2+ ratio |
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