Chemical fertilizer is extensively used in agriculture recent years, inevitably leading to soil acidification and compaction. Moreover, imbalance of soil nutrition and decreasing product quality have been becoming a critical problem. Nowadays, with the development of biogas techniques, residue got from fermentation is increasingly exploited in planting, which has a positive impact on increasing agricultural products' yield and quality and improving soil phisical and chemical conditions. Meanwhile, this method also makes full use of agricultural wastes, contributing to regarding the agricultural wastes as a kind of resource. In this paper, different fertilizing methods using different residues are used in our experiments in both farmland and lab in order to study the various effects on quality of mustard and corn, expected to provide theoretical and empirical evidence for practical production.
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