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。
The soil physical ＆ chemical properties under different vegetations were studied by using sampling methods. Result shows that the soil bulk density of Pinus rnassoniana pure forest is significantly larger than that of pure forest of Robinia pseudoacacia ＆ Pinus massoniana ＋ Robinia pseudoacacia ,but the field capacity ＆ total porosity are the minimum;the content of available potassium is maximum in Pinus rnassoniana forest,Robinia pseudoacacia is minimum;available phosphorus,available nitrogen,organic matter of Pinus rnassoniana forest is lowest, Robinia pseudoacacia and mixed forest of Pinus massoniana ＋Robinia pseudoacacia have no significant difference;the pH value of Pinus rnassoniana ＋ Robinia pseudoacacia is the highest;the pure forest of Pinus rnassoniana has no sig- nificant difference with the pure forest of Robinia pseudoacacia. Correlation analysis shows that the alkali-hydrolys- able nitrogen and available potassium show a significant negative correlation,organic matter,available potassium, a- vailable nitrogen and pH is significantly positively correlate, the available phosphorus and pH is negatively relate. The field water capacity, total porosity, available nitrogen, organic matter, available phosphorus of Robinia pseud- oacacia and Pinus massoniana ＋Robinia pseudoacacia have no significant difference. From an ecological point of view,it is suggested that mixed forest should be built in order to increase the resistance and reduce the cost of silviculture.
出处
《防护林科技》
2014年第5期20-22,共3页
Protection Forest Science and Technology
关键词
马尾松
刺槐
纯林
混交林
土壤理化性质
Pinus massoniana
Robinia pseudoacacia
pure forest
mixed forest
physical and chemical properties
