杨树人工林土壤生态环境分析

Analysis on the soil ecological environment of poplar plantation

采用对比分析方法,对河南省洛宁县成熟杨树人工林土壤微生态环境进行了分析。结果表明:成熟林地土壤中有效Mn和速效K含量高于无林地6.79%和43.90%,有效Fe、Cu、Zn、速效P和有机质含量分别低于无林地31.81%、4.39%、26.53%、29.68%和1.14%。物理性状分析表明:成熟林地土壤田间持水量、饱和含水量、毛管持水量、毛管孔隙度、非毛管孔隙度和总孔隙度分别比无林地高5.07%、11.88%、11.99%、5.50%、2.06%和5.32%,自然含水量和容重比无林地低9.44%和6.43%。成熟林地土壤过氧化氢酶、脲酶、蛋白酶和多酚氧化酶的活性分别上升了60.73%、6.27%、30.24%%和13.25%,过氧化物酶和磷酸酶活性分别下降了27.41%和7.66%。成熟林地土壤细菌、放线菌和微生物总数与无林地相比分别增加了118.60%、459.72%和163.27%,真菌减少了39.02%。

The soil micro-ecological environments of artificial mature poplar forest in Luoning County of Henan Province were studied by comparative analysis. The results showed that the effective Mn and rapidly available K contents of the mature forest land＇s soil were respectively 6.79% and 43.90% higher than those of non-forest lands＇, whereas the effective Fe, Cu, Zn, rapidly available P and organic matter contents were respectively 31.81%, 4.39%, 26.53%, 29.68% and 1.14% lower than those of non-forest lands＇. The soil physical property analysis indicated that the field moisture capacity, saturation moisture content, capillary moisture capacity, capillary porosity, non-capillary porosity and overall porosity in the mature forest land were respectively 5.07% , 11. 88%, 11.99% , 5.50%, 2.06% and 5.32% higher than those in non-forest lands, while the natural water content and volume weight were respectively 9.44% and 6.43% lower than those in non-forest lands. The activities of the catalase, urease, protease and polyphenol oxidase in the mature forest land＇s soil increased by 60.73%, 6.27%, 30.24%% and 13.25%, respectively, but those of the peroxydase and phosphatase decreased by 27.41% and 7.66%, respectively. The bacteria, actinomyces and microorganisms in the mature forest land＇s soil were respectively 118.60%, 459.72% and 163.27% more than those in non-forest lands＇, while the fungi in the mature forest land＇s soil were 39.02% less than those in non-forest lands＇.