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.