摘要
在桂东南广西六万林场28年生福建柏(Fokienia hodginsii)人工纯林和福建柏+红锥(Castanopsis hystrix)混交林中,通过在0~60 cm土层取样,测定及分析其土壤理化性质的变化。结果表明:2种人工林中,土壤容重均随着土层深度的增加而增加,土壤含水率、最大持水量、毛管持水量、毛管孔隙度、非毛管孔隙度、总孔隙度、最小持水量则表现出随土层深度的增加而降低;土壤交换性钙均随着土层深度的增加而增加,而土壤p H、有机质、全氮、水解氮、全磷、速效磷、交换性镁、有效铜、有效锌、有效硼均表现了随着土层深度的增加而降低。福建柏纯林0~20 cm土壤层理化性质要优于福建柏+红锥混交林,而21~40、41~60 cm土壤层则表现为混交林优于纯林,说明浅根系与深根系树种混交能够从深层次改善土壤肥力。相关性分析表明非毛管空隙度是福建柏+红锥混交林与福建柏纯林之间土壤理化指标发生差异的关键性指标。
In the28-year-old ofFokienia hodginsii pure plantation(pure FH)and mixed forest ofFokienia hodginsii and Castanopsis hystrix(mixed FH),the change of soil physical and chemical properties were studied in the0~60cm soil layer at Liuwan forest farm.The results showed that with the increase of soil depth,the soil bulk density of the two forest types increased,however,the moisture content,maximum water holding capacity,capillary water holding,capillary porosity,non-capillary porosity,total porosity and minimum water holding capacity decreased.With the increase of soil depth,the exchangeable calcium increased,while the soil pH,organic matter,total nitrogen,hydrolyze nitrogen,total phosphorus,available phosphorus,exchangeable magnesium,available copper,available zinc and available boron decreased Overall,the physical and chemical properties of pure FH was better than mixed FH in0~20cm soil layer The physical and chemical properties of mixed FH were better than those of pure FH in soil layer of21~40cm and41~60cm.This illustrated that the mixed species of shallow root system with deep root would improve soil fertility.Correlation analysis showed that the non-capillary porosity was the critical index which differences occurred between pure FH and mixed FH.
作者
冯国伟
梁泰昌
谭长强
冯建成
罗云龙
郭丽娟
FENG Guo-wei;LIANG Tai-chang;TAN Zhang-qiang;FENG Jian-cheng;LUO Yun-long;GUO Li-juan(Guangxi State Liuwan Forest Farm, Yulin, Guangxi 537000, China;Guangxi Forestry Research Institute, Nanning 530002, China)
出处
《广西林业科学》
2017年第2期196-200,共5页
Guangxi Forestry Science
基金
广西林科院基本科研业务费(林科201620号)
关键词
福建柏
红锥
纯林
混交林
土壤物理性质
土壤化学性质
Fokienia hodginsii
Castanopsis hystrix
pure forest
mixed forest
physical property of soil
chemical property of soil
