农牧交错带土地资源生产潜力评价——以甘肃省庆阳地区为例

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1、兰州人学颂f‘论史农牧交锚带十地资源生产潜，J评价——以1r肃省庆I；几地区为例!I—iI；IIo皇曼!!曼皇曼曼曼曼曼曼mapaboutthepotentiallandproductivitygradedistributionofQingyangregionisformed，andagriculturalsustainabledevelopmentcounterplanwassuppliedinordertoprovidetheoreticalbasisfordevelopmentofagriculturalresourcesof

2、QingyangandthedevelopmentoftheNorthwest，andtosupplyreferenceforthedevelopmentofregionalagriculturepolicy-makersandmanagers．Itsmainconclusionsasfollows：1．PotentiallandproductivityeffectivecoefficientinQingyangresearchregionchangedfrom0．257to0．916，averageis0．587，thenatur

3、alproductivitylevelofentireQingyangregionismedium-up．2．AccordingindicatorsfactoronpotentiallandproductivityandcontributionforlandproductivityaswellastheespecialtopographyofQingyangregion，indicatorsofpotentiallandproductivitywereidentifiedasfollow：Slope(S)，aspect(A)，ann

4、ualaccumulatetemperature(T)，annualaverageprecipitation(Aap)，frost-fleeperiod(F)，relativehumidity(H)，totalnitrogen(N)，totalphosphorus(P)，totalpotassium(K)，organicmatter(O)andSOon．ForQingyangresearchregion，themaininfluencingfactorsareprecipitationandslope，generally，thele

5、ssprecipitation，thesmallertheslope，theworsethequalityofthesoil，andthelowerofthesoilnaturalproductivepotential．3．PotentiallandproductivityintegratedindexmodelofQingyangregionWasobtained：PLPII=AapxO．2761+SxO．2080+AxO．1041+TxO．0395+FxO．1183+H×O．1578+Nx0．0307+PxO．0078+Kx0．

6、0181+Ox0．03924．SpatialdatabaseoftenecologicalindicatorsfactorinQingyangwereestablished，levelsdistributionmapofQingyangregionwassimulated，withthecharacterofpotentiallandproductivitygraduallyincreasingfromsoutheasttonorthwest．5．ThisstudyadoptGIStechnologyfirstlytocalcula

7、teandsimulatepotentiallandproductivityforcomplextopographyregionasQingyanginGansuProvince，andtheevaluationresultisinlinewiththelocalsituationoftheregion．Thjsresultnotonlycontributeabeneficialexplorationforcarryingoutstudiesabouttheevaluationofthepotentiallandproductivi

8、tyofLongdongravineregion，butalsosupplycredibleinformationanddecision—makingbasisforgovemrnentdepartmentssuchasagricul