CAJ | 학술논문

采用大型非称重式蒸渗仪法，在河北省坝上地区研究了灌溉量对紫花苜蓿（Medicago sativa L．）水分利用效率和耗水系数的影响。结果表明：随着灌溉量的增加，第1、2、3莅和全生长季（1～3茬）生物产量和经济产量水分利用效率皆呈现先升后降的趋势；第1茬中灌溉量处理显著高于低和高灌溉量处理（P〈O．05）。随灌溉量增加，各茬次和全生长季（1—3茬）生物产量和经济产量耗水系数均呈先降后升趋势；第1茬中灌溉量处理显著低于低和高灌溉量处理（P〈0．05）。不同茬次间水分利用效率及耗水系数差异显著（P〈0．05）。
채용대형비칭중식증삼의법，재하북성패상지구연구료관개량대자화목숙（Medicago sativa L．）수분이용효솔화모수계수적영향。결과표명：수착관개량적증가，제1、2、3리화전생장계（1～3치）생물산량화경제산량수분이용효솔개정현선승후강적추세；제1치중관개량처리현저고우저화고관개량처리（P〈O．05）。수관개량증가，각치차화전생장계（1—3치）생물산량화경제산량모수계수균정선강후승추세；제1치중관개량처리현저저우저화고관개량처리（P〈0．05）。불동치차간수분이용효솔급모수계수차이현저（P〈0．05）。
Effect of irrigation amount on water use efficiency（WUE） and water consumption coefficient（WCC） of alfalfa（Medicago sativa L.） was studied in Bashang area of Hebei province with lager scale no-weighting-lysimeter. The results showed that the WUE based on biology and economic yield of first harvest, second harvest, third harvest and whole growth season（lst- 3rd harvest） all gradually increased firstly, then decreased, as the irrigation amount raising. The WUE based on medium irrigation amount level of the first harvest was higher than that of low irrigation amount level and high irrigation amount level （P 〈 0.05）. The WCC based on biology and economic yield of first harvest, second harvest, third harvest and whole growth season（1st- 3rd harvest） all gradually decreased firstly, then increased, as the irrigation amount raising. The WCC based on medium irrigation amount level of the first harvest was lower than that of low irrigation amount level and high irrigation amount level （P 〈 0.05）. The difference of WUE and WCC between different harvest were significant （P 〈 0.05）.