不同植被类型土壤理化性质研究
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2014年5月防 护 林 科 技
May
,2014第5期(总128期)
Protection Forest Science and Technology No.5(Sum No.128
)文章编号:1005-5215(2014)05-0020-03
收稿日期:
2014-02-12 作者简介:
向光志(1973-),男,工程师,从事林业技术推广及营造林工作.
不同植被类型土壤理化性质研究
向光志,杨志训,秦连岗
(贵州省金沙县林业局,贵州毕节551800
)摘 要:采用样方法,研究了不同植被下的土壤理化性质。结果表明:马尾松纯林的土壤密度显著大于刺槐纯林和马尾松+刺槐混交林,
但田间持水量和总孔隙度最小;马尾松纯林有效钾含量最高,刺槐纯林最低;马尾松纯林有效磷、碱解氮、有机质最低,刺槐纯林与马尾松+刺槐林没有显著差异;马尾松+刺槐pH值最高,马尾松纯林和刺槐纯林之间没有显著差异;各植被土壤碱解氮与有效钾呈显著负相关,有机质与有效钾、碱解氮及pH值呈显著正相关,有效磷和pH值呈显著负相关;马尾松+刺槐林和刺槐纯林的田间持水量、总孔隙度、碱解氮、有机质、有效磷没有显著差异。从生态学的角度考虑,
建议营造混交林,以便增加抗逆性,降低营林成本。关键词:马尾松;刺槐;纯林;混交林;土壤理化性质
中图分类号:S714.2 文献标识码:A doi:10.13601/j
.issn.1005-5215.2014.05.006Soil Physical&Chemical Properties of Different Vegetation Typ
esXiang Guangzhi,Yang
Zhixun,Qin Liangang(Bureau of Forestry,Jinsha County,Guizhou Prov.,Bij
ie 551800,China)Abstract:The soil physical &chemical properties under different vegetations were studied by using sampling meth-ods.Result shows that the soil bulk density of Pinus massoniana pure forest is significantly larger than that of pureforest of Robinia pseudoacacia &Pinus massoniana+Robinia pseudoacacia,but the field capacity &total porosityare the minimum;the content of available potassium is maximum in Pinus massonianaforest,Robinia pseudoacaciaisminimum;available phosphorus,available nitrogen,organic matter of Pinus massoniana forest is lowest,Robiniapseudoacacia and mixed forest of Pinus massoniana+Robinia p
seudoacacia have no significant difference;the pHvalue of Pinus massoniana+Robinia pseudoacaciais the highest;the pure forest of Pinus massoniana has no signif-icant difference with the pure forest of Robinia pseudoacacia.Correlation analysis shows that the alkali-hydrolysablenitrogen and available potassium show a significant negative correlation,organic matter,available potassium,availablenitrogen and pH is significantly positively correlate,the available phosphorus and pH is negatively relate.The fieldwater capacity,total porosity,available nitrogen,organic matter,available phosphorus of Robinia pseudoacacia andPinus massoniana+Robinia pseudoacacia have no significant difference.From an ecological point of view,it is sug-g
ested that mixed forest should be built in order to increase the resistance and reduce the cost of silviculture.Key
words:Pinus massoniana;Robinia pseudoacacia;pure forest;mixed forest;physical and chemical properties 森林植被是影响土壤理化性质的重要因素,
探讨不同植被类型与土壤理化性质的关系,对合理利用土壤和经营人工林具有重要意义。笔者根据自己的工作经验,对马尾松纯林、刺槐纯林、马尾松+刺槐混交林的土壤理化性质进行了研究,为当地造林提供科学依据。
1 材料与方法
1.1 试验地概况
试验地位于金沙县,地理坐标为105°47′—106°
44′E,27°07′—27°46′N,
属北亚热带湿润季风气候,冬无严寒,夏无酷暑,无霜期长,昼夜温差大,雨量充沛,适宜多种作物生长。年均气温12.5~16.5
℃,年日照数平均1 098h,年无霜期平均275d,年平均降雨量1
050mm。采用时间为2013年5月。