文档介绍：宁夏压砂地土壤水分动态及消耗规律分析?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 AS tudy onS oilM oisture D ynamics and C onsumption P attern for W atermelon G rowing onG ravel-covered Mulched Field in Ningxia MA Guo-fei ,ZHANG Xiao-yu, ZHANG-Lie CAO-Ning ZHANG Xue-yi ( Ningxia Key Laboratory for Disaster Prevention and Reduction, Yinchuan 750002, China ) A bstrac t: Based on the field experiment, analysis the soil water dynamics and soil moisture changes of the whole watermelon growth period under the different irrigation water, the result showed: about 15mm disposable irrigation can improve soil moisture and it can be to meet the water needs of nearly 10d;the whole growth period water requirement has 4-sensitive period about the watermelon growing on gravel-covered mulched field , One of flesh change color and mature stage in greater demand on soil moisture; there isa big difference of soil moisture between irrigated and non-irrigated , Without irrigation, the fields prone to water deficit; The gravel-covered mulched field in different years there are some differences of soil moisture, usually the old gravel-covered mulched field (covered sand over 10 years) than