摘要
通过盆栽试验,研究了再生水不同灌溉方式对苜蓿生长发育和品质的影响.结果表明:与清水灌溉相比,再生水能显著增加苜蓿的株高、侧枝数及产草量,但对苜蓿叶面积有一定的抑制作用;再生水灌溉、再生水与清水混灌和轮灌使苜蓿体内可溶性蛋白含量分别增加78.43%、83.68%、72.53%,但再生水灌溉不利于苜蓿可溶性糖的累积.再生水灌溉下,苜蓿植株体内的Ca、Mg含量较清水灌溉分别增加了27.78%、26.61%;再生水灌溉及混灌下,苜蓿体内的Fe含量较清水灌溉分别降低28.71%、10.09%;再生水灌溉、轮灌和混灌下苜蓿地上部Cd含量较清水灌溉分别增加98.6%、89.5%和59.0%,但苜蓿体内重金属Pb、Cd含量仍低于国家卫生标准(GB 13078—2001)规定限量值.说明再生水是苜蓿可利用的灌溉资源,但其长期效应仍需进一步研究.
A pot experiment was conducted to study the effects of irrigation with regenerated water on the growth, nutrient uptake, and quality of alfalfa. Four treatments were installed, i. e. , irrigation with fresh water （Q）, irrigation with regenerated water （Z）, mixed irrigation with regenerated water and fresh water （ Z ＋ Q） , and rotational irrigation with regenerated water and fresh water （ Z/ Q）. Comparing with treatment Q, treatment Z increased the stem length, lateral branch number, and plant biomass significantly, but decreased leaf area. Treatments Z, Z ＋ Q, and Z/Q increased plant soluble protein content by 78.43%, 83.68% and 72.53%, respectively, but treatment Z decreased plant soluble sugar content. Treatment Z increased plant Ca and Mg contents by 27.78% and 26. 61% , and treatments Z and Z ＋ Q decreased plant Fe content by 28.71% and 10.09% , respectively. Treatments Z, Z ＋ Q, and Z/Q increased the cadmium content in above-ground part of alfalfa by 98.6% , 89.5% , and 59.0% , respectively, but the cadmium and lead contents were still lower than the thresholds of National Sanitation Standard （GB 13078-2001 ）. It was suggested that regenerated water could be used as a source of irrigation water in alfalfa growth, but its longterm effect should be concerned.
出处
《应用生态学报》
CAS
CSCD
北大核心
2009年第11期2659-2664,共6页
Chinese Journal of Applied Ecology
基金
国家环保公益性行业科研专项(200809047)资助.
关键词
再生水灌溉
苜蓿生长
品质
盆栽试验
irrigation with regenerated water
alfalfa growth
quality
pot experiment.
