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通过云南红壤旱地上两年的定位试验,研究翻压等量绿肥(光叶紫花苕)和化肥减量对烟草产量和产值的影响。结果表明,与单施全量化肥处理比较,翻压绿肥15 000 kg/hm2,氮磷钾化肥减量15%的处理烤烟产量,产值最高,烤烟增产11.89%,增值14.35%;氮磷钾化肥减量30%的处理,烤烟增产5.53%,增值5.55%;施用光叶紫花苕处理烤烟产量较空白对照增加18.81%,产值增加26.01%。可见,绿肥纳入烟草种植体系以后,烤烟产量,产值均得到提高,而且产值增幅超过产量增幅。表明光叶紫花苕纳入烟草复种体系,不仅有利于提高烟草产量,更有利于提高烟草品质,而且可以减少化肥用量。
Through the experiment of two years in red soil dryland in Yunnan Province, the effects of turning green pressure equal amount of green manure (Vitex negundo) and chemical fertilizer on the yield and value of tobacco were studied. The results showed that the yield of flue-cured tobacco with 15 000 kg / hm2 overturning green manure and 15% reduction of nitrogen, phosphorus and potassium fertilizers was the highest, with a yield increase of 11.89% and a value added of 14.35% The yield of flue-cured tobacco increased by 18.81% and the value of output increased by 26.01% compared with the control. Can be seen, green manure into the tobacco planting system, the production and output value of flue-cured tobacco have been increased, and the output value increased more than output growth. The results indicated that the inclusion of P. purpurea into tobacco multiple cropping system not only helps to increase the yield of tobacco, but also improves the quality of tobacco and reduces the amount of fertilizer.