人工刺槐改造更新林地土壤理化性质的变化及肥力评价  

Variation of Physicochemical Properties of Soil and Evaluation on Soil Fertility of Artificial Improved Stands of Black Locust (Robinia pseudoacacia L.)

作　　者：王进鑫[1] 余清珠[1] 刘增文[1] 白林波[1] 

机构地区：[1]西北林学院水土保持系

出　　处：《西北林学院学报》1995年第A01期47-52,共6页Journal of Northwest Forestry University

摘　　要：在人工刺槐林改造更新定位观测区，通过对土壤剖面测试分析，结果表明：改造更新后的林地土壤，容重变小，孔隙度增大，液相率提高，通透及保水能力增强。同时土壤ｐＨ值降低，全Ｎ、有效Ｐ和阳离子交换量明显提高，但速效Ｋ含量略有下降。通过１３个单项肥和指标综合评定结果表明，改造更新后林地土壤综合肥力水平显著增强。肥力水平排序为：萌生刺槐林＞２刺－３油＞３刺－３油＞２刺－２油＞１刺－２油＞未改造林。Researches on the soil of improved black locust (Robinia pseudoucacacia L. ) forests showed that volume weight of the soil decreased, but the porosity, moisture and permeability increased; the soil pH was lower while contents of nitrogen, effective phosphorus and canon exchange capacity increased evidently except that content of quickacting potassium decreased slightly; the soil fertility enhanced significantly and the order from high to low was as follows: sprout forest, 2 locust and 3 pine, 3 locust and 3 pine, 2 locust and 2 pine, 1 locust+2 oine and noimproved black locust ferest.

关 键 词：刺槐 人工林 土壤肥力 黄土高原 

分 类 号：S792.270.1[农业科学—林木遗传育种]