文档介绍：宁夏压砂地土壤水分动态及消耗规律分析*基金项目:国家科技支撑计划资助项目(2007BAD54B05)作者简介:马国飞(1980-),男,宁夏吴忠人,硕士,工程师,主要从事农业气象、农业气候资源等方面的研究。E-mail:nqkysmgf@马国飞张晓煜张磊曹宁张学艺(宁夏气象防灾减灾重点实验室,宁夏银川750002)摘要:通过田间试验,分析不同灌水条件下压砂农田土壤耗水及全生育期土壤水分变化规律,试验结果表明:压砂农田一次性灌水15mm左右能够有效提高土壤水分,可满足近10d的水分需求;压砂瓜全生育期内存在4个较明显的需水关键期,其中以变瓤期和成熟前期对土壤水分需求最大;灌溉对压砂瓜土壤水分影响较大,在无灌溉条件的砂地易出现水分亏缺;不同年限的压砂农田其土壤水分存在一定差异,通常老砂地(压砂10年以上)水分含量高于新砂地。关键词:压砂农田;压砂瓜;灌水试验;土壤水分AStudyonSoilMoistureDynamicsandConsumptionPatternforWatermelonGrowingonGravel-coveredMulchedFieldinNingxiaMAGuo-fei,ZHANGXiao-yu,ZHANG-LieCAO-NingZHANGXue-yi(NingxiaKeyLaboratoryforDisasterPreventionandReduction,Yinchuan750002,China)Abstract:Basedonthefieldexperiment,analysisthesoilwaterdynamicsandsoilmoisturechangesofthewholewatermelongrowthperiodunderthedifferentirrigationwater,theresultshowed:about15mmdisposableirrigationcanimprovesoilmoistureanditcanbetomeetthewaterneedsofnearly10d;thewholegrowthperiodwaterrequirementhas4-sensitiveperiodaboutthewatermelongrowingongravel-coveredmulchedfield,Oneoffleshchangecolorandmaturestageingreaterdemandonsoilmoisture;thereisabigdifferenceofsoilmoisturebetweenirrigatedandnon-irrigated,Withoutirrigation,owaterdeficit;Thegravel-coveredmulchedfieldindifferentyearstherearesomedifferencesofsoilmoisture,usuallytheoldgravel-coveredmulchedfield(coveredsandover10years):gravel-coveredmulchedfield;watermelon;irrigationexperiment;soilwater宁夏