生长发育过程中晒黄烟的养分吸收和干物质积累

Dry Matter Accumulation and Nutrient Absorption in Yellow Sun-cured Tobacco

通过田间试验研究了晒黄烟生长发育过程中干物质和养分积累与分配规律。结果表明,晒黄烟在整个生长发育过程中,干物质积累和养分吸收呈“慢-快-慢”的变化趋势,干物质积累的高峰期在移栽后30～75d,大量元素和微量元素的积累高峰期分别出现在移栽后的30～60d和45～75d。晒黄烟对大量元素的吸收量表现为N>K>Ca>P>Mg,对微量元素的吸收量表现为Mn>Fe>Cu>Zn>B>Mo。干物质及养分在各器官中的分配比例均表现为叶>茎>根。

The rule of dry matter accumulation and nutrient absorption and distribution were studied during the growth of yellow sun-cured tobacco in field. The results indicated that the profile of dry matter accumulation and nutrient absorption in yellow sun-cured tobacco was ＂slow-fast-slow＂ all way through its growth period. The peak period of dry matter accumulation was mainly in 30 - 75d after transplanting, and the peak periods of macroelement and microelement absorption were in 30 - 60d and 45 - 75d after transplanting, respectively. The order of macroelement absorption was N 〉 K 〉 Ca 〉 P 〉 Mg, and that of microelement absorption was Mn 〉 Fe 〉 Cu 〉 Zn 〉 B 〉 Mo. The organs in order of distribution ratio of dry matter and nutrients were leaf 〉 stem 〉 root.