不同培肥措施对黄壤烟田培肥效应研究

通过田间试验研究了不同培肥措施对烤烟产量、产值、烟叶品质及烟田培肥效应的影响.结果表明,施肥提高了土壤有效N,P,K质量分数,配施有机肥效果更明显,但要对有机肥的用量加以限制.施用牛粪时以有机氮占20%最好,其效果和施用堆肥对新整理烟田的改良效果相当,保证了烟田养分的持续供应,可避免新整理烟田烟株后期脱肥,同时提高新整理烟田土壤肥力.但是对于提高烟叶施木克值,提高烟叶品质来说,培肥方式应该推荐施用牛粪时有机氮占20%,即施用牛粪有机肥900kg/hm~2为最佳.

Effect of Different Fertilization on Yellow Soil Fertility in Tobacco

The field experiments were conducted to.investigate the effect of different fertilizer application strategies on the flue-cured tobacco yields,output values,quality as well as the soil fertility.The results showed that fertilization increased the mass fraction of available N,P and K in soil and the most significant improvements were occurred in the treatments with organic fertilizer.However,the dosages of organic fertilizer must be limited to a optimal range to maximize the effect.The effect of cow dung fertilizer of 20% organic N on soil fertility is similar to that of compost.It could avoid the lack of fertilizer in the latter growth stages of tobacco to ensured the sustained supply of soil nutrients to tobacco and increase the tobacco soil fertility.But for increasing of tobacco quality,in terms of Schmuck value,the compost application had no advantage compared with cow dung fertilizer of 20% organic N.We therefore recommend the cow dung fertilizer of 20% organic N (cow dung fertilizer application of 900 kg/hm2) as the optimal fertilization application strategy.