百喜草对元谋地区自然环境的适应性及其应用效益研究

在金沙江干热河谷典型区———元谋进行了百喜草(Paspalumnotatum)引种试验研究。结果表明 :百喜草适应性广 ,具有耐高温干旱、耐瘠薄、耐荫蔽、耐短期冷冻、耐践踏 ,抗病虫 ,分蘖、覆盖力强等特点 ;百喜草易种 ,易管 ,易繁殖 ,生态。

牟定-元谋地区航磁异常查证及找矿意义

通过对云南省牟定-元谋地区航磁异常开展的1∶2.5万地面磁测查证工作,基本查清了异常源,划分确定了两大类找铁磁异常:一类为与龙川群路古模组、海资哨组含铁石英绢云千枚岩、绿泥石英片岩有关的磁异常,其代表为大弯山磁异常,是寻找层控型低品位磁铁矿的重要地段;另一类为与基性-超基性侵入岩体有关的磁异常,其代表为安益磁异常,产有大型贫铂钯磁铁矿体。全区定性推断圈定出与铁有关的铁矿(化)带2个、含铁绿片岩带2个、贫铂钯磁铁基性-超基性岩体2个,分析了其找矿意义,为该区寻找低品位铁矿提供了方向。

论元谋干热河谷地区生态农业能源与物质循环工程建设

根据中国农村地区生态农业的可持续发展能源战略和建设方针,总结分析了农村能源建设的经验。元谋特殊的地理环境及气候条件,决定了干热区农村发展生态农业的紧迫性和重要性。系统地探讨了县级农村生态建设的成功模式,指出了干热区农村生态农业的发展方向。

元谋干热河谷坡地岩土类型与植被恢复分区

干热河谷不同岩土组成的坡地土壤水分状况差异较大 ,适合不同类型植被的生长。本文根据气候带和岩土类型的组合 ,进行了元谋干热河谷森林植被恢复适宜性分区。本区有 6种坡地岩土类型 ,3个气候带 ,分为森林植被恢复适宜区、较适宜区、较不适宜区、不适宜区和极不适宜区 5个区 ,其中适宜区和较适宜区面积 72 975 4 4hm2 ,占元谋干热河谷区总面积的 6 4 85 %。

云南元谋土地荒漠化特征及原因分析

元谋地区由于青藏高原隆起而产生的气候变化和人类活动强烈干扰而形成的土壤加速侵蚀，使土地荒漠化加速发展，主要表现在土地资源不断被蚕食和土壤退化而导致的土地质量下降，最终使土地荒废．因此，控制人口增长，调整区域农林牧结构布局，增加地表覆盖度，是控制区域土地荒漠化发展的主要措施。

云南元谋洋葱三种虫害防治技术

云南元谋是我国每年上市较早的洋葱生产基地之一,2月中旬洋葱就开始上市,直至3月下旬结束,年种植面积1333.3hm^2。洋葱作为一种主要的冬春蔬菜,在元谋地区以种植黄皮洋葱为主,红皮洋葱只占洋葱种植总面积的1/4。元谋洋葱外销主要出口日本、韩国、俄罗斯等国家。

云南元谋初中生非智力个性心理特征调查分析

目的 探讨非智力个性心理特征在特定人群中的发展水平及影响学习效果的主要非智力因素 ,为学生的教育、培养及转化提供依据 ,为从“应试教育”向“素质教育”转型探索方向。方法 采用非智力个性心理特征量表对云南省元谋一中初二年级 2 6 3名同学进行全面调查 ,所得数据进行统计学分析。结果 男生在“独立性”和“好胜心”方面比女生要强 ,乡镇同学比县城同学的“抱负”和“坚持性”有明显提高 ,“抱负”与“好胜心”在优等生、中等生及后进生对比中具有统计学差异 (P <0 .0 5 )。结论 “抱负”与“好胜心”是影响学习效果的主要非智力因素 ,“坚持性”及“自我意识”有助于学习活动的效能。培养和发展学生的这些非智力因素 。

元谋干热河谷相思树种和桉树类抗旱能力分析

对元谋干热河谷引种的 8种外来树种进行了抗旱性分析 ,发现水分利用效率从高到低的顺序依次是 :窿缘桉、赤桉、柠檬桉、绢毛相思、肯氏相思、厚荚相思、大叶相思、马占相思。水分利用效率越高 ,对干热环境的适应性越强。 8种外来树种适应干热河谷生境的旱性结构的特点是主根深、侧根多、栅栏组织和贮水组织发达、构成等面叶或近等面叶。桉树类树种的蒸腾速率较高 ,但能生存的主要机理是根系分布深 ,主动供水能力强 ,补充了地上部分的水分消耗 ;

生态农业在元谋干热河谷生态旅游中的开发前景

元谋干热河谷生态旅游资源丰富,但缺乏对资源的总体结构组装和综合功能的发挥,生态农业在该区的兴起和完善,解决了该区发展生态旅游的这个关键问题。从元谋干热河谷的区位、旅游市场、资源等优势出发,初步提出利用生态农业对该区各种旅游资源进行组装后的多种具有生态景观结构功能、观光旅游功能、生态环境保护功能、学习参与娱乐功能的生态农业模式,探讨生态农业在该区生态旅游发展中的重要性、可行性及开发前景。

元谋干热河谷木豆引种栽培试验初报

木豆(Cajanus cajan(L.)Millspaugh),又名树豆、千年豆、三叶豆、鸽子豆、蓉豆、柳豆、扭豆、黄豆树等,英文名Pigeonpea或Red Gram.原产于印度,是印度、东非和加勒比地区的重要经济树种,是迄今为止唯一的一种木本食用豆科作物.

Surface Morphology of Soil Cracks in Yuanmou Dry-hot Valley Region,Southwest China

Surface morphology of soil cracks is one of the important factors influencing the water evaporation rate in cracked soil in Yuanmou Dry-hot Valley Region,Southwest China. Quantitative study of the complicated surface morphology of soil cracks is a prerequisite for further studies of soil-cracking mechanisms. The present paper establishes a quantitative indicator system by application of concepts and methods originating from Fractal Geometry and Network Analysis. These indicators can effectively express the complicated features of soil-crack network structure. Furthermore,a series of values related to soil-crack morphology was obtained by image processing on field photos of soil-crack quads,and gradation criteria for the degree of development of soil cracks were determined. Finally,the changes in values of the morphological indicators under different degrees of development were analyzed in detail. Our results indicate that (1) the degree of development of soil cracks can be divided into five grades,i.e.,feeble development,slight development,medium development,intensive development and extremely intensive development; (2) the values of the indicators change predictably with increasing degree of development of soil cracks. The area density (Dc) increases,and both the area-weighted mean ratio of crack area to perimeter (AWMARP),which reflects the intensity of cracking,and the index r,which is related to the connectivity of a soil crack,grow uniformly (albeit with different forms). AWMRAP increases at a geometric rate while r shows logarithm-mic growth,indicating a gradual increase in theconnectivity of a soil crack. Nevertheless,the area-weighted mean of soil-crack fractal dimension (AWMFRAC) shows a decreasing trend,indicating a gradual decline in the complexity of cracks as area density increases.

Simulation of Morphological Development of Soil Cracks in Yuanmou Dry-hot Valley Region, Southwest China

Soil cracking is an important process influencing water and solutes transport in the Yuanmou Dry-hot Valley region of Southwest China. Studying the morphological development of soil cracks helps to further reveal the close relationship between the soil cracking process and water movement in such semi-arid regions. Here we report regular changes on surface morphology of soil cracks with decreasing water in four different soils (Typ-Ustic Ferrisols,Ver-Ustic Ferrisols,Tru-Ustic Vertisols and Typ-Ustic Vertisols) through simulation experiments. Our results indicate the following: 1) Different soils ultimately have different development degrees of soil cracks,according to their various values of crack area density. Soil cracks in Typ-Ustic Ferrisols can only develop to the feeble degree,while those in the other three soils are capable of developing into the intensive degree,and even into the extremely intensive degree. 2) Soil crack complexity,as expressed by the value of the area-weighted mean of crack fractal dimension (AWMFRAC),is found to continuously decrease as a whole through the whole cracking process in all the studied soils. 3) Soil crack connectivity shows a uniform trend in the studied soils,that is to say,connectivity gradually increases with soil crack development.