景洪橡胶分公司2005年橡胶树和胶园土壤营养分析

对景洪橡胶分公司橡胶树叶片和胶园土壤的营养分析结果:橡胶叶片N、P、K、Ca、Mg含量均值和各元素之间比值均在正常指标范围;土壤样品总体表现速效P明显偏低,而速效K大幅度增高。与1998年资料相比,2005年资料表明胶园橡胶叶和土壤营养水平虽有显著提高,但仍表现出严重的不均衡性:土壤有机质和全N有明显下降趋势,虽然叶样表现的各营养元素缺素症数量比1998年低,但从叶样的分布可以看出仍有1 918.9hm2(占全部胶树的16.9%)胶树叶片缺N;3744.2hm2(占32.9%)胶树缺P;1 544.5hm2(占13.6%)胶树缺K;140.4hm2(占1.2%)胶树缺Ca。需要在营养诊断基础上对症施肥、配方施肥,进一步提高胶园营养水平。

Nutrition of Rubber Tree and the Soil in Jinghong Branch

The analysis on the nutrition of the leaf and the soil was made in Jinghong branch,2005.The result shows that the mean value of N,P,K,Ca and Mg in the leaf and the ratio was well-balanced.The content of readily available phosphor was on the low side,but the content of readily available potassium increased obviously.The nutrition level was higher in 2005 than in 1998,but the imbalance was serious.The level of organic matter and full nitrogen was clearly downtrend in the soil.The result of the leaf sample shows that 1918.9 hm2 acreage(16.9% trees) were short of nitrogen,31918.9 hm2 acreage(32.9% trees) were short of phosphor,1544.5 hm2 acreage(13.6% trees) were short of potassium,140.4hm2 acreage(1.2% trees) were short of calcium.The reasonable fertilization can be make on base of the diagnosis to improve the nutrition level in the plantation.