湖南土壤生态区烤烟施肥模式优选

A RESEARCH ON THE OPTIMUM FERTILIZING PATTERN ON TOBACCO IN HUNAN

在湖南花垣、永州、临武三地烤烟产区的石灰岩母质发育的红壤上设置 5种施肥模式试验 ,结果表明 :对烟株的生长速率、烟叶产量和品质的综合影响 ,各模式间差异虽不显著 ,但模式 3由于采用了以施用复合肥料为主 ,基肥施足磷肥 ,烟苗移栽后补施氮肥 ,生育后期补施钾肥的施肥方案 ,能够满足湖南土壤生态条件下烤烟对养分的需求 ,有利于烟叶产量的提高和品质的改善 ,为最佳的施肥模式 .

Five fertilizing patterns of tobacco have been made in experiment fields in three tobacco producing areas in Hunan.The results are as follows:pattern Ⅲ proves to be the best in that it can increase the production,inprove the quality, and raise the efficiency of utilization ratio.Pattern Ⅰ is inferior to pattern Ⅲ.The fertilizing principle of tobacco in Hunan must take the special compound fertilizer of tobacco as the key link and the straight fertilizer as the adjustment, applying enough phosphate fertilizer as the basal and supplying nitrogen fertilizer in the early period and patash fertilizer in the middle or later period.