论文部分内容阅读
全棚覆盖地膜虽能降低空气湿度和病害发生几率,但这种做法也有弊端。阻碍了空气与土壤的气体交换全棚覆盖地膜后,氧气进入土壤和二氧化碳散出土壤受阻,导致土壤内二氧化碳积累、氧气缺乏,蔬菜根系呼吸强度下降,空气中也补充不到土壤产生的二氧化碳,蔬菜生长会受到影响。致使土壤中有害气体增加全棚覆盖地膜在影响土壤气体交换的基础上,由于土壤氧气含量的降低,土壤微生物进行厌
Covering the whole film to reduce the air humidity and disease risk, but this practice also has drawbacks. Hinder the air and soil gas exchange cover the whole studio to cover the film, the oxygen into the soil and carbon dioxide out of the soil obstruction, resulting in soil carbon dioxide accumulation, lack of oxygen, vegetable root respiration decreased, the air can not supplement the soil to produce carbon dioxide, Vegetable growth will be affected. Resulting in the increase of harmful gases in the soil to cover the whole studio film on the basis of the impact of soil gas exchange, due to the reduction of soil oxygen content, soil microorganisms are tired