阳江农场胶园土壤pH值与养分含量相关性分析

研究橡胶园土壤pH的分布状况，掌握pH变化对养分含量的影响，为橡胶园土壤养分高效利用及合理施肥提供理论指导。结果表明阳江农场胶园pH值范围是3.86～5.54，属强酸性土壤，pH值偏低对养分含量产生重要影响。pH值与速效钾呈极显著正相关性、与有机质呈极显著负相关性，与速效磷、全氮相关性不显著。另外，试验区养分含量普遍偏低，速效磷含量和速效钾含量主要在四级和五级水平，属缺乏。全氮和有机质含量主要在三级和四级水平，属中等水平。因此，建议在试验区施用适量的石灰来提高阳江农场胶园土壤的酸碱度，以利于土壤养分的释放。另外，还要重视有机肥的施用，提高土壤肥力，使土壤中各养分间达到动态平衡，以备橡胶树吸收利用。

Correlation between Soil pH and Nutrient Contents in Rubber Plantations at Yangjiang Farm

To grasp effects of pH change on the nutrient contents in rubber plantation, study the distribution of the soil pH, which provide theoretical guidance for the rubber plantations, efficient use of soil nutrients and rational fertilization. The results showed that pH of the rubber plantation soil in Yangjiang farm varied between 3.86 and 5.54, and belonged to a strong acid soil which makes important influence on nutrient content. pH was very positively significant correlation with available potassium, and negatively significant correlation with soil organic matter. While it was not significantly correlated with available phosphorus and total nitrogen. In addition, soil nutrient content in the experimental zone was generally in low status, and available phosphorus and available potassium content were classified as the deficiency level. Total nitrogen and organic matter content was mainly in optimum status. Thus, we suggested that the lime can be applied to improve pH of the rubber plantation soil in experimental area, which can facilitate the release of soil nutrients. Additionally, it was very crucial to use organic fertilizer for improving soil fertility, and keeping dynamic balance of the nutrients in the soil which was continuously absorbed by the rubber tree.