再生水对3种紫花苜蓿光合特性及产量的影响

Effects of Reclaimed Water on Photosynthetic Characteristics and Yield in Three Alfalfa Cultivars

为节约城市清洁水源,扩大再生水的利用力度,确保紫花苜蓿的稳产,以3种紫花苜蓿为研究对象,探讨了不同灌溉水源下紫花苜蓿的叶片光合色素含量、光合及叶绿素荧光特性、生长季内的累积干草产量及累积植株生长高度。试验采用2种水分处理:清水灌溉和再生水灌溉。研究表明:使用再生水灌溉后,3种紫花苜蓿的叶片光合色素含量及其光合作用能力均没有受到影响;四季旺的株高没有显著变化,但其干草产量明显增加;WL323HQ的干草产量和株高均没有显著变化;阿尔冈金的干草产量和株高均显著降低。

In order to save the clean water resources for the purpose of expanding the utilization of reclaimed water and insuring stable output of alfalfa, the impact characteristics of reclaimed water irrigation on the photosynthetic pigment content in leaves, the ability of photosynthesis, cumulative hay yield and plants height in growing period were studied. Two irrigation treatments were conducted： fresh water irrigation and reclaimed water irrigation. The experimental results show that ： 1. The photosynthetic pigment content in leaves and the ability of photosynthesis of three alfalfa cuhivars were not affected after irrigation with reclaimed water; 2. The growth height of Siriver hardly changed , but its hay yield markedly increased ;3. The growth height and hay yield of WL323HQ had no significant alteration; 4. The growth height and hay yield of Algonquin decreased significantly.