土壤环境中除草剂甲磺隆降解的研究I.土壤性质的影响

采用方差分析,研究了各土壤中不同形态甲磺隆残留量的差异程度;通过主因子分析,选出5个主因子,它们代表了整体信息量的90.4%;回归分析后建立了土壤性质和甲磺隆残留间的多元回归方程;经偏相关分析和通径分析得出,土壤pH值和微生物活性是甲磺隆降解的主要影响因素.

An analysis on karst environment change processes in the north-eastern part of Italy

An analysis on karst environment change processes in the North eastern karst areas of Italy was made in the paper. Karst environment there experienced serious environmental degradation and gradual restoration in past years. Karst environmental degradation there was caused by over grazing and over cultivating through cleaning forest as well as firewood and timber industry. The war also contributed to the degradation. Restoration of the degraded environment succeeded since the end of the second World war although works for reforestation began in the 12th century. The successful process of environmental restoration and control in the region was an integral one, which involved multi value exploitation, adjustment of regional social economic structures, realization of urbanization, improvement of populotion quality, and provision of new eaploymert opportunities for the locals. The significance of the experience of karst environment restoration of north easernt Italy for Chinese karst environment control was also discussed in the paper.