The landscape dynamic was researched in Zhifanggou watershed of Ansai,a loess plateau,during last 25 years. The result showed that the landscapes were different in the different period,but the whole structure was not ...The landscape dynamic was researched in Zhifanggou watershed of Ansai,a loess plateau,during last 25 years. The result showed that the landscapes were different in the different period,but the whole structure was not obviously changed. The landscape percentage of eco-protection type;pro-economics type and living-service type was relatively stable. The area of eco-protection type was the largest while that of pro-economics type was the smallest in 2005. The patch element quantity of each vegetation landscape was small,however the average area of patch element was large and the fragmentation degree was low. With the lapse of time,the diversity indices and evenness indices of vegetation landscape were increased first and then decreased,but the degree of dominance indices was decreased first and then increased. The landscape structure was reasonable in 2005. There were some achievements in conservation of vegetation. The conservation of vegetation ecology system reached to ideal degree. The proportion of forest,shrub and grass was rational. The agriculture product and the security of region ecology system were increased. Therefore this landscape structure would be as a model for local vegetation and ecology construction.展开更多
为探讨有机肥对行道树悬铃木土壤肥力的影响,采用完全随机区组试验设计研究2类有机肥不同处理下,中型行道树悬铃木土壤矿质元素含量和微生物数量变化情况以及两者之间的相关性。结果表明:在有机肥不同处理下,土壤中细菌、真菌、放线菌...为探讨有机肥对行道树悬铃木土壤肥力的影响,采用完全随机区组试验设计研究2类有机肥不同处理下,中型行道树悬铃木土壤矿质元素含量和微生物数量变化情况以及两者之间的相关性。结果表明:在有机肥不同处理下,土壤中细菌、真菌、放线菌的数量显著增加,以TM10-2(有机肥田美乐,每株施用10 m L,共施用2次)效果最佳,且TM系列处理能够明显控制真菌数量;各处理能够显著提高土壤矿质元素的含量,其中TM10-1(有机肥田美乐,每株施用10 m L,共施用1次)和TM10-2能够显著提高土壤中大量元素的含量,而各处理对土壤中交换性钙和镁含量的影响不显著,但TM系列处理能够优化Ca:Mg值;总体上,TM系列在提高土壤有效铜、铁、锰含量方面的作用优于Z(真根有机肥)系列;相关分析表明,大量元素与细菌数量极显著相关,微量元素与放线菌数量的相关性显著,而两者与真菌数量的相关性均不显著。因此,对城市行道树土壤施肥,能显著改善土壤肥力,TM肥可作为城市行道树优先推用的有机肥,且以每株施用10 m L,施肥2次效果较好。展开更多
文摘The landscape dynamic was researched in Zhifanggou watershed of Ansai,a loess plateau,during last 25 years. The result showed that the landscapes were different in the different period,but the whole structure was not obviously changed. The landscape percentage of eco-protection type;pro-economics type and living-service type was relatively stable. The area of eco-protection type was the largest while that of pro-economics type was the smallest in 2005. The patch element quantity of each vegetation landscape was small,however the average area of patch element was large and the fragmentation degree was low. With the lapse of time,the diversity indices and evenness indices of vegetation landscape were increased first and then decreased,but the degree of dominance indices was decreased first and then increased. The landscape structure was reasonable in 2005. There were some achievements in conservation of vegetation. The conservation of vegetation ecology system reached to ideal degree. The proportion of forest,shrub and grass was rational. The agriculture product and the security of region ecology system were increased. Therefore this landscape structure would be as a model for local vegetation and ecology construction.
文摘为探讨有机肥对行道树悬铃木土壤肥力的影响,采用完全随机区组试验设计研究2类有机肥不同处理下,中型行道树悬铃木土壤矿质元素含量和微生物数量变化情况以及两者之间的相关性。结果表明:在有机肥不同处理下,土壤中细菌、真菌、放线菌的数量显著增加,以TM10-2(有机肥田美乐,每株施用10 m L,共施用2次)效果最佳,且TM系列处理能够明显控制真菌数量;各处理能够显著提高土壤矿质元素的含量,其中TM10-1(有机肥田美乐,每株施用10 m L,共施用1次)和TM10-2能够显著提高土壤中大量元素的含量,而各处理对土壤中交换性钙和镁含量的影响不显著,但TM系列处理能够优化Ca:Mg值;总体上,TM系列在提高土壤有效铜、铁、锰含量方面的作用优于Z(真根有机肥)系列;相关分析表明,大量元素与细菌数量极显著相关,微量元素与放线菌数量的相关性显著,而两者与真菌数量的相关性均不显著。因此,对城市行道树土壤施肥,能显著改善土壤肥力,TM肥可作为城市行道树优先推用的有机肥,且以每株施用10 m L,施肥2次效果较好。
