高峰林场厚荚相思幼林营养诊断

测定和分析高峰林场厚荚相思(Acacia crassicarpa)速丰林幼林的土壤和厚荚相思叶片的营养元素含量,并与相关树种叶子营养元素含量比较,探讨厚荚相思在赤红壤山地营林中的施肥技术.结果表明,高峰林场界牌分场内用于种植厚荚相思树的赤红壤土壤中有效N、P、K含量极低;厚荚相思叶片中N、P、K营养元素含量低于马占相思(Acacia mangium)、红锥(Castanopsis hystrix)和木荷(Schima superba)3个相关树种;P、K、Ca营养元素在冬季至春季的过程中有明显的减少.因此,在营养元素缺乏的赤红壤林地,对厚荚相思速丰林的配方施肥过程除了应对N给予重视外,更应适当增加P、K和Ca的施用量.

Nutrient Diagnosis of Young Acacia crassicarpa in Gaofeng Forest Farm

To investigate the fertilizer application for the young trees of Acacia crassicarpa growing in the soil of latosolic red soil, the soil and leaves of the trees in the stands were sampled. The contents of N, P, K, Ca were tested and compared with trees of Acacia mangium,castanopsis hystrix and Schima superba. The available N, P, K in the soil were quite lower. The contents of N, P, K in the leaves of A. crassicarpa were less than that of other three trees, and declined obviously in the time from winter to spring. In the management of fertilization, not only the providing of N ,but also that of P ,K and Ca should be paid attention.