宁夏中部干旱带旱地西瓜根际补灌栽培最佳补灌时期及适宜补灌量的研究

试验对宁夏中部干旱带旱地覆膜西瓜根际补灌栽培技术进行了研究。结果表明:以相同补灌量(5kg/株)在不同生育时期实施1次补灌,以显蕾开花期供水效率和产量最高,分别达1 760.19 kg/(mm.hm2)和40 767kg/hm2;在同一生育时期(显蕾开花期)以不同补水量实施1次补灌,在同时满足供水效率最高和产量最大的前提下,以3 kg/株的补灌量较适宜。在最佳补灌时期实施适量补灌,能够达到节水、增产和高效补偿供水的目的。

Study on period and appropriate amount of rhizosphere complementary irrigation for watermelon in arid area of central Ningxia

Field trials are conducted to study the rhizosphere supplementary imigation for watermelon in the arid area of central Ningxia. The results show that, as for the same imigation amount(5 kg/ plant) , flowering and fruit-bearing pe-riods are the stages of complementary irrigation with the most water supply and yield-increasing efficiency, respectively 1 760.19 kg/(mm·hm²) and 40 767 kg/hm²; using defferent irigation amount at the flowering and fruit-bearing peri-ods, both the yield and water supply efficiency are the largest under the irrigation amount of 3 kg per plant each time. To carry out complementary irrigation with optimum amount at proper stages is an effective way for saving water, increasing yield and using complementary water efficiently.