作　　者： ; ; ; (刘运国）; (杨祥）; (高继雄）;

机构地区： 云南省烟草科学研究所

出　　处： 《中国农学通报》 2009年第4期101-105,共5页

摘　　要： 在氮磷施肥水平相同的情况下,采用田间小区试验研究了不同钾肥用量对烤烟生长的影响及根茎叶对钾肥的吸收利用率。结果表明:低钾处理对烤烟叶面积系数、地上部分干物质积累量的影响较大,高钾处理的影响较小。低钾处理烟根系干物质累积总量显著大于对照,高钾处理与对照比差异不显著。地上部分对钾肥的利用率20天<40天<60天,20天、40天钾肥的利用率与施钾量呈指数函数型高度极显著相关,60天呈二次曲线型中度相关。根系对钾肥的利用率20天<40天<60天<80天<100天,20天根系对钾肥的利用率与施钾量呈三次曲线型高度极显著相关,40天呈二次曲线型高度相关,60天、100天呈指数函数型高度极显著相关,80天呈指数函数型中度相关。 In the same nitrogen and phosphorus fertilizer level condition,efficiency of fertilizer utilization inr oots,stem and leaves with different fertilizer response and effect of different potassium fertilizer consumptiono n flue-cured tobacco growth was studied by field experiment.The results showed that leaf area index and drym atter accumulation in the aerial parts of the plant was effected largely by low potassium consumption but thee ffect by high potassium consumption was small.The dry matter accumulation total of low potassiumc onsumption was higher significantly than control,however that of high potassium consumption was nos ignificant different with the control.The efficiency of potassium fertilizer utilization of the aerial part was 20 d〈4 0 d〈60 d.The efficiency of potassium fertilizer utilization of 20 d and 40d was significant correlation withp otassium consumption in exponent functional pattern.That of 60 d was middle correlation with potassiumc onsumption.The efficiency of potassium fertilizer utilization of roots was 20 d〈40 d〈60 d〈80 d〈100 d.Thee fficiency of potassium fertilizer utilization of 20 d roots was significant extremely correlation with potassiumc onsumption in cubic curve pattern,that of 40 d was high correlation in quadratic curve pattern that of 60d and1 00 d was significant extremely correlation in exponent functional pattern and that of 80 d was middlec orrelation in exponent functional pattern.

关 键 词： 烤烟 钾肥用量 干物质积累 肥料利用率

领　　域： [农业科学] [农业科学]