废水污泥对花生植物酶活性及其品质的影响

研究了沼气化废水(BSW)、酒糟水(RSW)及污水塘泥(LS)与一定量的NPK+FYM(厩肥)对花生的营养品质及土壤和植物酶活性的影响。结果表明:废水污泥对花生纯蛋白的含量无明显影响,但是能增加种子产量,蛋氨酸和半胱胺酸含量比对照分别增加44%和24%;BSW处理种子产量最高,其次是RSW和LS;LS处理的花生叶片叶绿素含量最高;BSW和RSW能显著增加植物过氧化酶,而BSW处理中植物多酚氧化酶含量较高;应用废水污泥不会影响硝化还原酶活性,但是BSW在根际土壤明显增加硝酸盐的含量。3种废水污泥比NPK+FYM(厩肥)处理明显增加脱氢酶和碱性磷酸酶的活性。

Effect of Waste-water Sludge on Plant and Soil Enzymatic Activity and Groundnut Quality

An experiment in the effect of the bio-methanated spent wash(BSW), raw spent wash(RSW) and lagoon sludge(LS) with NPK+FYM(farmyard manure) on nutritional quality of groundnut and enzyme activity of plant and soil was conducted.The waste-water sludge did not affect the content(%) of protein in groundnut but increased the seed yield and the content of methionine by 44% and cysteine by 24%.The highest seed yield(619?kg/hm 2) could be produced with the treatment of BSW and then the yield(557?kg/hm 2 and 472?kg/hm 2), RSW and LS. The highest total content of chlorophyll(2.94?mg/g) in groundnut leaf was recorded with the treatment of LS. The application of BSW and RSW significantly increased the activity of plant peroxidase whereas the plant polyphenol oxidase was high in BSW only.The application of wastewater sludge did not affect the nitrate reductase activity but BSW significantly increased the content of nitrate in the rhizosphere soil. The waste-water sludge significantly increased the dehydrogenase and alkaline phosphatase activity more than the treatment of NPK+FYM.