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ID:22122282
大小:35.00 KB
页数:11页
时间:2018-10-27
《广金钱草分布和品质适宜性区划研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、广金钱草分布和品质适宜性区划研究 [摘要]通过对华南和西南地区(广东、广西、海南和云南)的广金钱草实地调研,结合夏佛塔苷、多糖的含量,运用最大信息熵模型和地理信息技术,分别筛选出影响广金钱草分布适宜性和品质适宜性的主导生态因子,再对广金钱草的分布和品质进行适宜性区划。分布区划的结果表明,4月均温、最冷季节均温、土壤类型和寒冷指数4个生态因子对广金钱草分布适宜性的影响最大。品质区划的结果表明:①多糖含量与4月降水量呈显著性正相关;夏佛塔苷含量与4月均温、最冷季节均温呈显著性负相关,与10月、11月降水量,4月、5月日照时长呈极显
2、著负相关,与4月降水量、温度季节性变化标准差呈显著性正相关,与2月、3月降水量呈极显著性正相关。②分别以夏佛塔苷、多糖为品质指标,依据品质区划模型绘制出广金钱草的品质区划图。该研究可为广金钱草生产区划、种植基地选择和定向培育提供科学选址依据。 [关键词]广金钱草;最大信息熵;地理信息技术;分布适宜性;品质适宜性 [Abstract]TheresearchondistributionandqualitysuitabilitydivisionofDesmodiumstyracifoliumwereformulatedbyMaxe
3、ntandArcGISmodelbasedonthecontentofschaftosideandpolysaccharideofD.styracifoliumanditsfieldresearchinthesouthandsouthwestareasofChina(Guangdong,Guangxi,HainanandYunnan),andthemostsuitablehabitatsofdistributionsuitabilityandqualitysuitabilitywerescreened.Thedistributi
4、onsuitabilityresultsindicatedthataverageairtemperatureinApril,meantemperatureofcoldestquarter,soiltype,coldnessindexwerefoundasthefourdominantfactorscontributingtotheplantdistribution.Thequalitysuitabilityresultsindicatedthat:①PolysaccharidecontentandprecipitationinA
5、prilshowsignificantpositivecorrelation;SchaftosidecontentandmeantemperatureofApril,meantemperatureofcoldestquartershowsignificantnegativecorrelation.SchaftosidecontentshowssignificantnegativecorrelationwiththeprecipitationinOctoberandNovemberandthesunshinedurationinA
6、prilandMay,whilethereisasignificantpositivecorrelationbetweenschaftosidecontentandprecipitationinAprilandtemperatureseasonalitystandarddeviation,andahighlysignificantpositivecorrelationwasfoundbetweenschaftosidecontentandprecipitationinFebruaryandMarch.②Thequalityzon
7、ingmapwasdrawndependongeneralcontentofpolysaccharideandschaftosideastheindexofquality.Andthisresearchprovidesscientificlocationbasisfortheproductionregionalization,cultivationbasesselectionanddirectivebreedingofD.styracifolium. [Keywords]Desmodiumstyracifolium;MaxEn
8、t;AcrGis;distributionsuitability;qualitysuitability ?V金钱草Desmodiumstyracifolium(Osbeck)Merr.为豆科植物,以地上部分入药[1],生于山坡、草地、土坎或灌木丛中,是两广地区
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