【摘要】 对福建省5个主要油茶产区的土壤养分、油茶产量和种仁含油率进行了调查和测定,结果表明:(1)样地间p H值差异最小,其他土壤养分差异明显,种仁含油率的差异较小。(2)相关性分析结果显示,土壤养分相互关系紧密,有非常明显的协同与拮抗作用,油茶产量与种仁含油率的负相关系数达到-0.67。(3)通径分析表明土壤中有效Fe、水解性N、速效K对产量的影响最大,大、中量元素对油茶产量较大的正向直接通径效应是微量元素的间接通径效应累积的结果,回归分析表明全K、有机质、有效Fe与产量的相关性达到极显著水平,不同的分析方法得出的主要结果基本一致。(4)含油率受土壤养分的影响较小。应根据油茶林本底营养和需肥特性制定科学合理的施肥方案。更多还原

【Abstract】 The soil nutrient, yield and oil content of seed kernel from five different Camellia oleifera orchards in Fujian were analyzed and determined. The results show that:(1) the variable coefficients of p H in different orchards were the smallest while the other soil nutrients had obvious variation, the interaction coefficients of variation for oil content o f seed kernel were also low;(2) the relationship of soil nutrients was close, showing obvious cooperation and antagonism, the negative correlation coefficient reached-0.67 between yield and oil content;(3) the results of path analysis showed that the available Fe, hydrolyze N and available K had the biggest influence on yield, the major and secondary element having a big direct path coefficient with yield was the result of cumulative effect of indirect path coefficient of trace element, and the stepwise regression analysis suggested that total K, organic matter and available Fe were significantly correlated with yield, the results of two different analyses were consistent;(4) the influence of soil nutrient on oil content was small, so the scientific and rational fertilization scheme should be made based on the background nutritional status of C. oleifera woods and the relationship between soil nutrient and yield and oil content.更多还原