平衡施肥毛竹林叶片营养与土壤肥力及产量的回归分析

Regression Analysis of Leaf Nutrition,Soil Fertility and Output in Bamboo Forest of Balance Fertilization

对奉新县平衡施肥毛竹林的叶养分含量与土壤肥力及产量的相关性进行研究。结果表明:不同年龄集约经营竹林毛竹叶片养分含量变化规律与一般竹林基本一致。I度竹嫩叶的N、P、K元素含量均高于其他各度竹;Ca、Mg、S含量随竹龄增大而增大;微量养分元素Mn、Zn含量随竹龄变小而减少。土壤中影响竹叶N素含量的主要因子是有机质、速效P、活性酸、速效N和全K。土壤中影响竹叶P素含量的因子按其与竹叶中P含量的相关关系从大到小排序为:活性酸>盐基代换量>速效K>全K>速效Ca>速效P>速效N>pH值。影响竹叶中K含量的因子主要是全N、速效N、速效P、全K及活性酸,它们与竹叶中K含量的相关关系从大到小排序为:速效P>全K>速效N>活性酸>全N。施肥能快速补充竹叶养分,是竹林持续经营的保障。

The nutrient content＇ s correlation between leaf and soil of bamboo forest with balance fertilization in Fengxin County was studied. The results showed that it was basically consilient that the variation of the nutrition contents in the leaves of bamboos in the same age between the intensive managed and commonly managed forests. The contents of N, P and K of the tender leaves in the Ⅰ-degree bamboo are higher than those in other ages respectively. The contents of Ca, Mg, S, Mn, Zn increased with the age increase. The major factors of influencing nitrogen content in bamboo leaf were organic matter, available P, activated acid, available N, total K in soil. The major factors and order of influencing phosphorus content in bamboo leaf were activated acid 〉 base-exchange capacity 〉 available K 〉 total K 〉 available Ca 〉 available P 〉 available N 〉 pH value in soil. The major factors influencing potassium content in bamboo leaf were total N, available N, available P, total K and activated acid, its order of correlation was available P 〉 total K 〉 available N 〉 activated acid 〉 total N. Fertilization can promote supplements for nutrition of leaf, and ensure keeping bamboo forest sustainable development.