富钾绿肥籽粒苋对烤烟干物质积累和产量、质量的影响

Effect of rich-potassium green manure amaranthus on dry matter accumulation,yield and quality of flue-cured tobacco

在等量氮、磷、钾配比条件下,研究了富钾绿肥籽粒苋与化肥不同配比(有机态氮30%、50%、70%)对烤烟干物质积累和产量的影响,结果表明:⑴富钾绿肥籽粒苋与化肥配施有利于烟株早生快发,分别使干物质积累总量、积累强度和烟叶产量平均提高24.0%、16.9%和17.6%;(2)随着有机态氮比例增加,烟叶成熟落黄推迟,干物质积累总量、积累强度和烟叶产量增幅显著减小,烟叶品质下降;(3)30%有机态氮的处理比对照产量提高27.8%,均价提高18.8%,效果最佳。

Effect of rich-potassium green manure amaranthus with different proportions （organic nitrogen 30 %, 50 %, 70 % ） of chemical fertilizer on dry matter accumulation, yield and quality of flue-cured tobacco was studied. Results indicated that： （1） applying rich-potassium green manure amaranthus with chemical fertilizer can promote root growth, increase accumulation and intensity of dry matter as well as yield by 24.0%, 16.9% and 17.6% respectively. （2） increasing the proportion of organic nitrogen resulted in later mature, less increase of accumulation and intensity of dry matter while yield and quality were reduced . （3） compared with CK, yield and average price increased by 27.8% and 18.8% under the treatment of 30% organic nitrogen.