论文部分内容阅读
为探讨钾肥不同追施时期对烤烟生长发育及产质量的影响,研究了钾肥三种不同的追施时期下,烤烟生长发育及产质量的变化。结果表明:移栽后35~50 d追施钾肥,有利于烤烟生长发育和产量的提高及品质的改善;且以移栽后50 d的施用效果最好,打顶后7 d,烤烟的最大叶SPAD值和叶面积最高,根系体积最大,产量达到2135.0~2415.0 kg/hm~2,产值达53 588.5~61 824.0元/hm~2。
In order to explore the effect of different topdressing periods of potash on the growth, yield and quality of flue-cured tobacco, the effects of potash fertilizer on the growth and yield and quality of flue-cured tobacco under three different times of top dressing were studied. The results showed that topdressing K fertilizer 35 ~ 50 days after transplanting was beneficial to the growth and development of flue-cured tobacco and the improvement of yield and quality; and the best application effect was 50 d after transplanting, The highest leaf SPAD value and leaf area, the largest root volume, the yield reached 2135.0 ~ 2415.0 kg / hm ~ 2, the output value reached 53 588.5 ~ 61 824.0 yuan / hm ~ 2.