污水灌溉对番茄生长与品质的影响研究

污水中污染物对土壤、作物的影响日益受到人们的关注。通过在日光温室进行的污水灌溉田间试验,分析了不同水质对番茄生长、产量与品质的影响,探讨了Hg、As在作物表层土壤中的积聚和在番茄果实中的积累规律。结果表明,与清水灌溉相比:①污水灌溉对番茄的生长有一定的抑制作用,生长速度明显减慢;②番茄的单株产量减少7.68%;③番茄果实中的可溶性固形物、Vc含量有大幅度增加,总酸度和可溶性总糖含量基本持平,蛋白合成上污水处理较差;④污水灌溉后土壤重金属Hg、As含量在不同土层集聚差异较大,同时土壤中Hg、As集聚间具有很好的相关性,说明土壤受外源污染影响较大,而且还发生复合污染。

Research on Tomato Growth and Quality with Sewage Irrigation

People have focused on the pollutants impact on the soil and crop in sewage irrigation.The experiment in the greenhouse is designed to show the influence to the tomato growth,output and quality.We also discuss the distribution and accumulation rule of elements Hg and As in the soil and tomato.Comparing to the Shimizu irrigation,the results show that:①The tomato growth slows down;②The output of single plant is decreased by 7.68%;③Soluble solid and Vitamin C in the tomato is increased on large margins.The content of total acidity and soluble sugar seems like no difference,and sewage irrigation is poorer in the soluble protein synthetic progress;④Significant variant of soil heavy metals concentrations between different sites and strong correlations between heavy metals are discovered.The soil environment is deeply impacted with exterior pollutants,and risk of complex pollution still exits in the area.