摘要
测定了沙棘+侧柏,刺槐+侧柏及其对应侧柏纯林土壤80cm土层32个土样的8项肥力指标和人工林生长量,对2个混交林的土壤肥力特征及混交对侧柏的促生效应进行了初步探讨。结果表明:(1)供试混交林80cm土层土壤有机质、全氮、速效氮含量及其剖面变异和氮素贮量表现为沙棘>侧柏及刺槐>侧柏,沙棘、刺槐人工林对土壤的培肥效应大于侧柏;(2)沙棘+侧柏混交林不同树种根区土壤pH、碳酸钙、全磷及速效钾含量差异很小。
Fertility of 32 soil samples from 80 cm soil horizon in mixed plantations of Hippophae rhamnoides+Platycladus orientalis, Robinia pseudoacacia+P. orientalis and pure plantation of P. orientalis were determined. The soil fertility characteristic and the growth-promoting effect of the two mixed plantations to P. orientalis were investigated. The results indicated that: ①Content and variation of the soil organic matter, total nitrogen, available nitrogen and the soil nitrogen storage under at 80 cm soil horizon of the mixed plantations were H. rhamnoides>P. orientalis and R. pseudoacacia>P. orientalis. The improvement of the H. rhamnoides and R. pseudoacacia to soil fertility were more obvious than P. oricntalis. ②The growth promoting effect of the mixed plantations of the H. rhamnoides+P. orientalis is related with the increasing of the soil nitrogen storages in the root region of Platycladus orientalis caused by H. rhamnoides. ③There was little differences among pH, CaCO_3,total phosphorus and available potassium of the different trees root region in mixed plantations.
出处
《西北林学院学报》
CSCD
北大核心
2005年第3期31-35,共5页
Journal of Northwest Forestry University
基金
国家"八五"重点科技项目(85-019-02-02)。
关键词
混交林肥力
混交效应
黄土高原人工林
沙棘
刺槐
soil fertility of mixed plantations
mixed effects
plantations on the Loess Plateau
Hippophoe rhamnoides
Robinia pseudoacacia
