论文部分内容阅读
通过用间歇密闭室抽气法对不同施肥方式下的夏玉米田间土壤氨挥发进行了研究。结果表明:基肥与追肥氨挥发一共持续了15d与11d,基肥时期氨挥发累积量在2.970~4.123kg·hm~(-2)之间,占施肥量的0.81~1.65%;追肥时期累积量在6.240~8.347kg·hm~(-2)之间,占施肥量的3.1~4.6%。不同施肥处理氨挥发的总量范围在2.914~3.920kg·hm~(-2)之间,占施肥量的2.3~3.0%;垄作覆膜是降低氨挥发损失的有效施肥方式;而追肥条件下,有机物料还田、施用复合肥和添加尿酶抑制剂会增加氨挥发强度。本次试验结果表明,即使在碱性土壤上,在严格的控制条件和良好的施肥管理条件下,氨挥发损失量仅占总施肥量的约1~2%。
Ammonia volatilization from summer maize field under different fertilization regimes was studied by intermittent airtight chamber extraction. The results showed that the volatilization of basal fertilizer and topdressing ammonia lasted for 15 days and 11 days, respectively. The cumulative amount of ammonia volatilization during the basal period was between 2.970 and 4.123 kg · hm -2, accounting for 0.81-1.65% of the total amount of fertilizer application. 6.240 ~ 8.347kg · hm ~ (-2), accounting for 3.1 ~ 4.6% of the amount of fertilizer. The total amount of ammonia volatilization in different fertilization treatments ranged from 2.914 to 3.920 kg · hm -2, accounting for 2.3-3.0% of the fertilizer application. The ridge-coating was an effective fertilization method to reduce the ammonia volatilization loss. Under top dressing conditions , Return of organic material to the field, application of compound fertilizers and addition of urease inhibitors increase ammonia volatility. The results of this experiment show that, even in alkaline soil, under the strict control conditions and good fertilization management conditions, the ammonia volatilization loss accounts for only about 1-2% of the total fertilization amount.