关键词: 塑料大棚, 塑料大棚, 土壤温度, 日变化特征, 气温, 响应

Abstract: Seven field experiments were run for two years to study the effects of commercial organic fertilizer application on the yield of vegetables and rice and the accumulation of heavy metals in soil and agricultural products. The results showed that the combined application of chemical and organic fertilizers could significantly increase the yield of vegetables, but it had less effective to increase the yield of rice. Application of commercial organic fertilizer could also increase the accumulation of heavy metals such as Cr, Cu, Zn, Cd, Pb, and As in soil. The Cumulative amounts varied with sources of organic fertilizers, and increased with increasing the application rates. In general, short-term application of the commercial organic fertilizer did not lead to the excessive heavy metals in vegetables and rice products, but it did increase the content of heavy metals such as Cu, Zn, Cd, and Pb in vegetables and rice products. Annually recommended application rate of organic fertilizer was 250~500, 100~200, and 500 kg/ mu, respectively, for vegetable production, rice-rape plantation system, and rice-strawberry plantation system. All of the organic fertilizer was recommended to be applied as base fertilizer.