石灰石粉混施剂量对酸雨区马尾松细根特征的影响  

Response of Fine Root Characteristics of Pinus massoniana to the Doses of Limestone Powder Mixed in Soil in the Acid Rain Area of Chongqing,China

作　　者：潘伟[1] 王彦辉[2] 于澎涛[2] 李志勇[3] 莫菲[2] 史东梅[1] 杜士才 何萍 段健 

机构地区：[1]西南大学资源环境学院,重庆400716 [2]中国林业科学研究院森林生态环境与保护研究所,北京100091 [3]河南科技大学农学院,河南洛阳471003 [4]重庆市林业局,重庆401147 [5]重庆市铁山坪林场,重庆400026

出　　处：《林业科学研究》2009年第6期840-845,共6页Forest Research

基　　金：中国林科院中央级公益性科研所基本科研业务费专项资助(CAFYBB200700X);科技部社会公益研究专项资助(2004DIB3J102);科技部"十一五"科技支撑计划项目课题(2006BAD03A1803);国家林业局天然林保护工程科技支撑课题(TBKJ2003-04);国家林业局森林生态环境重点实验室资助

摘　　要：在重庆市铁山坪林场28年生马尾松纯林内选取10棵优势木,进行土柱内混施5个剂量(134、261、388、515、642 g.m-3)的石灰石粉试验,在混施前和混施2 a后分别进行了根系调查。结果表明:施不同剂量石灰石粉的马尾松的细根特征有明显差别。随着混施剂量的增加,细根的5个特征都表现为先增大后降低的趋势,施388 g.m-3石灰石粉的细根特征值最大,表明其促进根系生长的效应最好;细根长度、细根表面积、细根根尖数、细根体积、细根干质量分别为600 m.m-3、130 dm2.m-3、15万个.m-3、220 cm3.m-3、39 g.m-3。The dose-effect of limestone acidified soil was studied at Tieshanp powder on fine roots of Masson pine （Pinus massoniana） forest growing on ing, Chongqing in Southwest China. Ten dominant trees of P. massoniana were selected in a 28-years-old stand for this study, and five treatments or application doses （134,261,388,515 and 642 g · m^-3） of limestone powder were designed to be mixed in soil columns around the sampled trees. The invertigations were conducted before and 2 years after treatment. The results showed that the fine root characters of P. msaaoniana were significantly different after applying different doses of limestone power. With the increase of does, all the five character values showed a trend of decrease after increase. The character value after applying 388 g · m^-3 of limestone powder was the maximum, indicating its best effect to promote the growth of root system, i. e. the length,surface area, root tip amount,volume and dry mass of fine roots were 600 m · m^-3, 130 dm^2 · m^-3, 150 000 tips. m^-3 ,220 cm^3 · m^-3, and 39 g· m^-3 ,respectively.

关 键 词：马尾松 细根 酸雨区 石灰石粉 土壤改良 

分 类 号：X517[环境科学与工程—环境工程] S791.248[农业科学—林木遗传育种]