Effects of Biogas Waste on Solanaceae Vegetable Growth and Soil Nutrient Accumulation in Greenhouse
KANG Ling-yun1，ZHAO Yong-zhi2，QU Ming-shan2，CHEN Qing1
1 College of Resources and Environmental Sciences，China Agricultural University，Beijing 100193，China|2Beijing Soil and Fertilizer Work Station，Beijng 100092，China
Abstract：As the byproduct of biogas projects，biogas wastes have the advantages of multiple nutrient and stable supply．Greenhouse vegetable field may be the main consumptive place for biogas waste．Greenhouse experiment with double cropping system was carried out to study the effects of partial chemical fertilizer substituted by biogas wastes on solanaceae vegetables growth and soil nutrient accumulation．The results showed that no significant differences were investigated in vegetable growth and fruit yield among different treatments with different proportions of biogas wastes and chemical fertilizer．It means that if the chemical fertilizer is completely substituted by biogas wastes，it can still meet the crop nutrient requirement．However，the accumulation of phosphorus in soil surface layer and the risk of nitrogen leaching might occur．Therefore，it is necessary to pay more attention to environmental problems in long-term application of biogas wastes，and special attention must be paid to limit the annual amount of biogas wastes application．
