烟草膜下滴灌试验研究

Studies on Tobacco Drip Irrigation under Plastic Cover

摘要: 采用大田对比试验的方法研究了大理州烤烟膜下滴灌的效果。结果表明，随着烟株的生长和发育，干物质积累逐渐增加，以旺长期和成熟期干物质积累为主；硝酸还原酶均在旺长期活性最强，成熟期显著下降；在较适宜滴灌量范围内，较小的滴灌量有利于提高水分利用率。大理州自然生态条件下，以40 ~ 50 m³/667m² 滴灌量为宜。

Abstract: Effects of drip irrigation in Dali on tobacco growth were studied by using field comparative experiment. The results showed that dry matter accumulation gradually increased with the development of tobacco growth, and main phase was fast growing and round top period. Nitrate reductase activity reached peak in fast growing period, and significantly declined after round top period. In the range of relatively appropriate drip irrigation rate, lower drip irrigation rate was of benefit to enhancement of water use efficiency. In conclusion, drip irrigation rate of 40-50 m³/667m² was appropriate to Dali tobacco-planted area.