农家肥施用水平对烤烟产量及氮、钾吸收利用的影响

目的]为了克服烟农对农家肥的施用过于随意的习惯,了解烤烟施用农家肥最适宜的水平范围,进而为曲靖市植烟土壤农家肥的施用提供理论依据和生产指导。方法]采用田间小区试验的方法,研究农家肥施用水平对烟叶产量、产值及氮、钾含量、累积吸收量的影响。结果]农家肥施用水平对烟叶产量、产值及氮钾的累积吸收影响很大。一方面,表现为当农家肥施用水平低于15 000 kg/hm2时并不能促进烟叶产量、产值及氮钾累积吸收量的增加;另一方面,当农家肥施用水平达到60 000 kg/hm2时烟叶产量、产值及氮钾的累积吸收量反而降低。结论]曲靖市烤烟农家肥施用水平最适宜范围在30 000～450 000 kg/hm2。

Effects of Farmyard Manure Application Ratio on Tobacco Yield and Nitrogen and Potassium Uptake

Objective]The experiment aimed to overcome the farmers’habit of applying manure too casually for tobacco,to explore the most rational application level of manure for Qujing tobacco soil and provide a theoretical basis and production guidance.Method] The field plot experiment was conducted to study the effects of farmyard manure application ratio on tobacco production,output and nitrogen and potassium uptake and accumulation at Banqiao Town,Qujing City,Yunnan Province in 2011.Result] Farmyard manure application ratio had a great influence on tobacco yield,production value and cumulative absorption of nitrogen and potassium.On the one hand,the tobacco production,output and accumulated nitrogen and potassium uptake didn’t increase,when farmyard manure application amount was less than 15 000 kg / hm2.On the other hand,the tobacco production,output and accumulated nitrogen and potassium uptake decreased,when farmyard manure application amount reached 60 000 kg / hm2.Conclusion]The most appropriate range of farmyard manure application for Qujing tobacco soil was between 30 000 kg / hm2 and 450 000 kg / hm2.