江西省蓝莓林地土壤限制因子分析

摘要

In order toifnd out soil nutrient status of blueberryforestinJiangxi Province,and to providea technological guidancefor balancedfertilization of blueberry, the nutrientlimitingfactorswere diagnosedandanalyzed byadopting the system diagnosismethod of soil nutrient status,and effects of nutrient deifciency on plantswerealsoresearched bya pot experiment. Theresults showed that content of organicmatterwaslowerin the tested blueberryforest soil,and Ca, P, N, KandMg elementswere severely deifcientandwere themainlimitingfactors. Cu,Band Zn elementsweregeneral lack,and theywere the potentiallimitingfactors.But S,Mnand Fe elementswererelativity sufifcient. Theresults of the pot experiment showed that yieldwould bereduced by 85.62%, 40.51%, 34.00%, 33.86%respectively,if Ca, P, Nand K were notfertilizedfor sorghum.%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%.