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当前位置: 首页 > 文章 > 灌溉量和灌溉时期对紫花苜蓿耗水特性和产量的影响 节水灌溉 2010 (1) 30-34
Position: Home > Articles > Effects of Irrigation Amount and Stage on Water Consumption Characteristics and Yield of Medicago SativaL Water Saving Irrigation 2010 (1) 30-34

灌溉量和灌溉时期对紫花苜蓿耗水特性和产量的影响

作  者：
裴学艳;宋乃平;王磊;谢榜雄
单  位：
宁夏大学西北退化生态系统恢复与重建省部共建教育部重点实验室;宁夏大学资源环境学院
关键词：
紫花苜蓿;灌水量;灌溉时期;耗水特性;产量
摘  要：
2008年通过第2茬苜蓿田间试验,研究了不同灌水量和灌水时期对紫花苜蓿耗水特性、鲜草产量及其水分利用效率的影响。结果表明:土壤贮水消耗量占总耗水量百分率的变异系数显著低于降水量占总耗水量百分率的变异系数,表明土壤贮水利用率的可调控幅度不是很大;适量灌溉的W3处理(灌水6次,灌水量100 mm)的灌水量、降水量和土壤贮水消耗量占总耗水量的百分率分别为42.6%、45.67%和11.73%,灌水量多的W6处理(灌水6次,灌水量210 mm)分别为76.43%、39.01%和-15.44%,与W6处理相比,W3处理显著提高了土壤贮水消耗量占总耗水量的百分率。灌水量均为100 mm的条件下,W3处理的耗水量显著高于W2处理(灌水3次),W3处理的耗水模式与苜蓿需水规律相吻合,这是其水分利用效率高的生理基础。
译  名：
Effects of Irrigation Amount and Stage on Water Consumption Characteristics and Yield of Medicago SativaL
作  者：
PEI Xue-yan1,2,SONG Nai-ping1,WANG Lei1,XIE Bang-xiong1,2 (1.United Research Center for Exploitation of Ecology and Biological Resources in Western China,Ningxia University,Yinchuan 750021,China;2.School of Resource and Environment,Ningxia University,Yinchuan 750021,China)
关键词：
Medicago sativaL;irrigation amount;irrigation stage;water consumption characteristics;yield
摘  要：
Field experiment on the second stubble Medicago sativaL was conducted in 2008 to study the effects of irrigation amount and stage on the water consumption characteristics,fresh grass output,and water use efficiency of Medicago sativaL.The results showed that the variation coefficient of the proportion of soil water consumption amount to total water consumption amount was significantly lower than that of precipitation to total water consumption amount,which suggested not very wide regulation range of soil water use efficiency.The proportions of irrigation amount,precipitation,and soil water consumption amount to total water consumption amount were 42.6%,45.67% and 11.73% in treatment W3(irrigates six times,with total irrigation amount of 100 mm),and 76.43%,39.01% and-15.44% in treatment W6(irrigates six times,with total irrigation amount of 210 mm),respectively.This indicated that treatment W3 had a significantly higher proportion of soil water consumption amount to total water consumption amount than treatment W6.Though treatments W3(irrigates six times) and W2(irrigates six times) had the same irrigation amount(100 mm),the water consumption amount was significantly higher in W3 than in W2.The water consumption pattern in treatment W3 was in agreement with the water requirement,pattern of Medicago sativaL,which was the physiological basis of high water use efficiency.

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