文档介绍：水钾耦合对烤烟干物质和钾积累分配的影响
摘要:通过盆栽试验研究了水钾耦合对烤烟干物质与钾积累分配的影响。结果表明,供钾和供水都显著增加烤烟干物质和钾积累量,W2K2和W2K1的干物质积累量最大, W2K2和W1K2的钾积累量最大,W0K0的干物质和钾积累量最小,部位之间表现为叶片>茎>根;对比正常供水,相对湿润降低了叶片的干物质和钾分配比例;相同土壤水分条件下,供钾减小根、茎的钾分配比例,有利于钾素向叶片积累分配,但随着供钾量的增加,叶片的钾分配比例有降低的趋势;干旱使根的干物质和钾分配比例增大,茎相对减小,不利于烤烟地上部干物质和钾积累;相关分析结果表明,干物质和钾积累量的变化达到了显著相关。
关键词:水钾耦合;烤烟;干物质;钾;积累;分配
Effect of Water and Potassium(K) Fertilizer Coupling on Dry Matter and Potassium Accumulation and Distribution in Flue-cured o
Zhang Nan
(o Project 2004-1 of Agronomy College)
Abstract: Pot experiments were conducted to determine the effects of water and potassium(K) fertilizer coupling on dry matter and potassium accumulation and distribution in flue-cured o. The results showed that the dry matter and potassium accumulation of o increased when provided water and potassium, the dry matter accumulation of W2K2 and W2K1 is biggish, the potassium accumulation of W2K2 and W1K2 is biggish, the dry matter and potassium accumulation of W0K0 is least, the distribution ratio of dry matter and potassium in o is leaf >stem>root. The distribution ratio of dry matter and potassium in o when provided excessive water. Providing potassium is in favor of potassium accumulation and distribution in leaves of o by decrease the distribution ratio of root and stem while the same water, but the distribution ratio of leaf decreased when provided more potassium. Drought is not in favor of the dry matter and potassium accumulation of above-ground part of o because it increased the distribution ratio of dry matter and potassium of roots and decreased stem. The results of correlation analysis showed that there are significant correlation between dry matter and potassium accumulation.
Key words: Water and potassium(K) fertilizer coupling;Flue-cured o;Dry matter;Potassium;Accumulation;Distribution
我国的烟草种植面积和总产量均居世界首位[1],烟叶生产在国民经济中占有重要的地位。水分和肥料直接影响着烟叶的产量、质量和效益,是烟草生长发育必不可少的重要物质资源。烤烟是喜钾作物,对钾的需要量高,生产优质烟叶不得不施用形成最适产量烟株生长所需钾素的2-3倍钾肥,才能使烟叶含钾量有较大幅度提高,达到明显提高烟叶品质的目的,因此,充足供