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以污泥干化芦苇床运行2年和自然稳定1年后的稳定化污泥为肥料,进行污泥农田肥效试验。试验分时期考察了大豆作物在不同污泥配比下的生长趋势,包括植株高度、果实产量及果实营养成分等。试验共设定6组,污泥和土壤的配比分别为1∶8.0,1∶5.0,1∶3.5,1∶2.6,1∶2.0及空白组。每组设10个平行样,共60株。试验结果表明:大豆株高与污泥浓度呈正相关,大豆产量及果实营养成分也与污泥浓度有关,适当的污泥浓度可以促进大豆增产并增加其营养成分含量,但污泥浓度超过一定限度以后,产量及营养成分有所下降。
Using sludge from the reed bed for 2 years and the stabilized one year after natural stabilization as fertilizer, the fertilizer efficiency test on sludge farmland was carried out. During the experiment period, the growth trend of soybean crops under different sludge proportions was investigated, including plant height, fruit yield and fruit nutrition components. A total of 6 groups were set up. The ratio of sludge to soil was 1: 8.0, 1: 5.0, 1: 3.5, 1: 2.6, 1: 2.0 and blank group respectively. Each set of 10 parallel samples, a total of 60 strains. The results showed that there was a positive correlation between the plant height and the sludge concentration, and the soybean yield and fruit nutrient content were also related to the sludge concentration. Appropriate sludge concentration could promote the soybean yield and increase the nutrient content, but the sludge concentration exceeded a certain limit Later, the output and nutrient content declined.