定位施肥紫色菜园土壤钾素效应研究

发布时间：2018-05-09 12:11

本文选题：定位施肥 + 紫色菜园土壤　；参考：《长江流域资源与环境》2016年10期

【摘要】：基于紫色菜园土壤3年12季连续蔬菜(莴笋-白菜轮作)定位施肥试验,研究不同施肥条件对土壤钾素形态和供钾水平的影响。采用田间试验和室内化学分析结合的方法测定不同施肥处理土壤钾素形态的变化和蔬菜产量的关系。结果表明:紫色菜园土壤钾素主要以矿物钾为主,占全钾的95.11%~97.33%,土壤缓效钾和速效钾分别占土壤全钾的2.22%~3.38%和0.44%~1.52%。连续施用钾肥显著提高土壤速效钾和缓效钾含量,以增钾处理作用最优。定位施肥显著提高土壤水溶性钾、非特殊吸附钾、特殊吸附钾含量,以有机无机肥料配施作用优于单施化学肥料。土壤水溶性钾、非交换性钾与土壤有效磷含量呈显著或极显著正相关,莴笋和白菜产量与紫色菜园土壤速效钾、缓效钾含量呈显著正相关。定位施肥协调紫色菜园土壤钾形态,改善土壤供钾能力,以有机无机肥料配施作用为优。
[Abstract]:The effects of different fertilization conditions on soil potassium forms and potassium supply levels were studied based on three years and 12 consecutive seasons of vegetables (lettuce and cabbage rotation) in purple garden soil. The relationship between the change of soil potassium form and the yield of vegetables was determined by the combination of field experiment and chemical analysis in laboratory. The results showed that potassium in purple garden soil was mainly composed of mineral potassium, which accounted for 95.11 ~ 97.33% of total potassium, and slow available potassium and available potassium accounted for 2.223.38% and 0.44% of total potassium, respectively. Continuous application of potassium fertilizer significantly increased the content of available potassium and slow available potassium, and the effect of potassium increasing was the best. The content of water-soluble potassium, non-special adsorbed potassium and special adsorbed potassium were significantly increased by localizing fertilization. The effect of organic inorganic fertilizer combined with chemical fertilizer was better than that of chemical fertilizer alone. Soil water-soluble potassium, non-exchangeable potassium and available phosphorus content were significantly or extremely positively correlated, lettuce and cabbage yield were positively correlated with available potassium and slow available potassium content in purple vegetable garden soil. The combination of organic inorganic fertilizer and organic inorganic fertilizer was the best way to coordinate the potassium form of purple vegetable garden soil and improve the ability of soil potassium supply.
【作者单位】：西南大学资源环境学院;四川省农业科学院土壤肥料研究所;
【基金】：农业部公益性行业科研专项(201203013) 国际植物营养所(IPNI)项目(Chongqin200808)~~
【分类号】：S158

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