金沙江干热峡谷中退化的土壤生态系统生物学特征初探

Distribution characteristics of soil animals,microorganisms and enzymatic activity were studied in the dry red soil and Vertisol ecosystems with different degradation degrees in the Yuanmou dry hot valley of the Jinsha River,China.Results showed that Hymenoptera,Araneae and Collembola were the dominant groups of soil animals in the polts studied.The numbers of groups and individuals and density of soil animals in the dry red soil series were higher than those in the Vertisol series,and the numbers of individuals and density of soil animals decreased with the degree of soil degradation.Bacteria dominated microbiococnosis not only in the dry red soils but also in the Vertisols.Microbial numbers of the dry red soil series were higher than those of Vertisol series,and decreased with the degree of soil degradation.The activities of catalase,invertase,urease and alkaline phosphatase declined with the degradation degree and showed a significant decline with depth in the profiles of both the dry red soils and the Vertisols,but activities of polyphenol oxidase and acid and neutral phosphatase showed the same tendencies only in the Vertisols.It was concluded that the characteristics of soil animals,microorganisms and enzymatic activity could be used as the bio-indicators to show the degradation degree of the dry red soils and Vertisols.Correlation among these soil bio-indicators was highly significant.     

金沙江干热河谷温带早熟水果发展现状及措施

通过对金沙江河谷气候特点的分析,提出金沙江河谷发展温带早熟水果的前景,总结其技术现状及需要解决的主要问题,对该地区发展温带早熟水量产业有一定借鉴。     

田园诗画看元谋

当北国还是"千里冰封,万里雪飘"的严寒季节,地处金沙江畔的元谋热坝却是"暖暖春光早到"",满园果、蔬醉人"。勤劳智慧的元谋人民在美丽富饶、瓜果飘香的元谋热坝上,建设出了如诗如画、醉人心扉的田园仙境。小丙岭科技示范园。小丙岭科技示     

攀枝花芒果炭疽病发生规律及综合防治

攀枝花市地处金沙江干热河谷地区,由于其特殊的地理条件和自然资源,目前已成为我国同纬度地区最晚熟的优质芒果生产基地.近年来,随着芒果种植面积的不断扩大,芒果炭疽病的,发生日趋加重.     

来自红松故乡的后人

<正>2009年的金秋十月,在金沙江林产品公司党委龚副书记的引领下,一天清晨,我乘坐公司的车从云南"元谋人"发源地——元谋县城出发,专程上山到一个偏僻的小山村采访他们公司的一个天保     

昭通市金沙江沿岸地区青椒种植业的现状、存在问题及其发展举措

通过调查研究对昭通市金沙江沿岸地区青椒种植业的现状和存在问题有所了解,在对其作系统性论述的基础上,提出了发展本区青椒种植业的5点建议。     

金沙江干热河谷地区脐橙生产的优势及栽培特点

金沙江干热河谷地区光照资源优于四川盆地大部分脐橙产区 ,适宜脐橙生长发育 ,在该区域种植脐橙已成为发展当地经济的支柱产业。因此 ,了解脐橙在该区域的生长发育规律和栽培技术特点 ,是制定正确技术措施 ,保证高产优质的基础。1　脐橙在干热河谷区的生产优势1.1　优质、高产　金沙江干热河谷地区栽培脐橙投产快、产量高、品质好。特别是近年引种栽培的朋娜、纽荷尔和纳维林娜等脐橙品种在区内反应很好。雷波、宁南、普格等县在 1993年引进朋娜等脐橙品种的接穗进行高接换种 ,1995年开始投产 ,获得很好的社会效益和经济效益。其果实在参加…