土壤水分及抗旱劑對(duì)草地早熟禾蒸散與生長發(fā)育影響的研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文土壤水分及抗旱劑對(duì)草地早熟禾蒸散與生長發(fā)育影響的研究姓名：李冬杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：水土保持與荒漠化防治指導(dǎo)教師：楊培嶺20050601中國農(nóng)業(yè)大學(xué)碩上論文AbstractAbstract1hemainpurposeofthispaperwastoinvestigatetheeffectofsoilmoistureandchemicalagents(Superabsorbentpolymers，F(xiàn)AHandi

2、long)ontheevapotranspimfion(ET)andthegrowthofPoapratensiswiththepotandfieldexperiments，1111eorthogonalexperimentswasconductcdwithtllepotexperiment，whichconsistedofthreefatorsincludingsoilmoisture(SM)andtheusagequantityof

3、superabsorbentpolymersandFAHandilouganyoneofwhiehhasthreelevels玨eresults西owthat：功ejowerlimitsoilmoistureforPoapratensiswas55％FCThesuperabsorbentpolymerscouldeffectivelyimprovethegrowthofPoapratensisandreducedtheevapotran

4、spimtionintheconditonofSM=(70～85％)or(40～55％)FCbutnosignificantlyeffectwasobservedwhenthesoilmoisturewasabout(55～70％)FC(aO1)FAhandilongcouldcon仃ol也estomatalconductancewhensprayedonthePoapratensisthereforereducetheevapotra

5、nspirationItalsohadsignificantlyinfluenced(ctO1)ontheLAIandtheBiomassofPoapratensis，butthevegetalrate，densityR／C，theaverageclippingyieldpermonthhadnosignificantlyinfluenced(a01)2InthisPaDermullipleindexescompmhensiveeval

6、utionwasusedintheevalutionofPoapratensis，thecomprehensiveevalutinnfimctionbasedonthewatersavingwaseducedClusteringanalysisresultshowedthatthevegetalrate，densityLAIcumulateclippingyield，above—groundandundergroundbiomassca

7、nbesubstitutetooneofthemaddingthewidthofthegrassleafandtheR／CoftheturfgrasscangetthesameevalutioneffectThosegaveanewscientificandimpersonalwayforturfgrasscomprehensiveevalutionandevalutionindexsfiltratinginthefurtherstud

8、y3ThebestPoapratensisqualitywasobservedwhenlOOg／m2superabsorbentpolymersand39／m2FAHandilongwasappliedintheconditionofSM=(70～85)％FCBasedontheconsiderationofwatersavingandeconomic，when39／m‘FAHandilongwassprayedintheconditi

9、onofSM=(55～70)％FCwithoutsuperabsorbentpolymers，thePoapratensiscouldsatisfiedtheviewdemand4ArandomizedtrialwascarriedoutinthesujiatuowatersavingdemonstrationdistrctTheresultshowedthatthechemicalagentscanincreasethesoilmoi