江西省蓝莓林地土壤限制因子分析

Analysis of nutrient limiting factors in blueberry forest soil of Jiangxi Province

为了解江西省蓝莓林地土壤养分状况,从而为蓝莓平衡施肥提供技术指导,采用土壤养分状况系统研究法(ASI)对江西省蓝莓林土壤养分限制因子进行了诊断与分析,还就缺素对植株的影响情况进行了盆栽实验。诊断结果表明:供试蓝莓林地土壤中有机质的含量均较低,Ca、P、N、K、Mg元素严重缺乏,这些养分因子为其主要限制因子;Cu、B、Zn普遍缺乏,为其潜在的限制因子;而S、Mn、Fe元素的含量相对丰富。盆栽实验结果表明:不施Ca、P、N、K的指示作物——高粱的产量则分别减少85.62%、40.51%、34.00%、33.86%。

In order to find out soil nutrient status of blueberry forest in Jiangxi Province, and to provide a technological guidance for balanced fertilization of blueberry, the nutrient limiting factors were diagnosed and analyzed by adopting the system diagnosis method of soil nutrient status, and effects of nutrient deficiency on plants were also researched by a pot experiment. The results showed that content of organic matter was lower in the tested blueberry forest soil, and Ca, P, N, K and Mg elements were severely deficient and were the main limiting factors. Cu, B and Zn elements were general lack, and they were the potential limiting factors. But S, Mn and Fe elements were relativity sufficient. The results of the pot experiment showed that yield would be reduced by 85.62%, 40.51%, 34.00%, 33.86% respectively, if Ca, P, N and K were not fertilized for sorghum.