长江流域资源与环境 >> 2016, Vol. 25 >> Issue (10): 1611-1617.doi: 10.11870/cjlyzyyhj201610016
谷守宽1, 秦鱼生2, 孙倩倩1, 王正银1, 涂仕华2
GU Shou-kuan1, QIN Yu-sheng2, SUN Qian-qian1, WANG Zheng-yin1, TU Shi-hua2
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。
中图分类号:
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