烤煙不同生育期供鉀水平對(duì)葉片鉀含量的影響
Effects of Potassium Rate in Different Growth Stages on Leaf Potassium Content of Flue-cured Tobacco
-
摘要: 采用砂培法模擬烤煙不同生育期的鉀素營養(yǎng)對(duì)煙葉產(chǎn)量和含鉀量的影響,。結(jié)果表明，煙葉產(chǎn)量與烤煙生育前,、中期供鉀量呈極顯著正相關(guān),；煙葉含鉀量與烤煙中,、后期供鉀量呈極顯著正相關(guān)。通徑分析發(fā)現(xiàn),，烤煙生育中期供鉀強(qiáng)烈影響煙葉產(chǎn)量和含鉀量,，生育前期供鉀主要對(duì)煙葉產(chǎn)量有一定作用，而對(duì)煙葉含鉀量影響較??；生育后期供鉀主要影響煙葉含鉀量，而對(duì)煙葉產(chǎn)量作用較小,。提出生育后期充足供鉀對(duì)提高煙葉含鉀量作用極大,，并提倡鉀肥分次使用。Abstract: The studies on the effects of potassium nutrient in different stages of growth on leaf yield and quality of flue-cured tobacco were conducted by way of sand culture. The results demonstrated that tobacco leaf yields was significantly correlated with K application in early and mid stages, while K content in leaf was highly significantly correlated with K application in later stage of growth. The results of path analyses showed that K application in mid stage had strong effect on the leaf yield and leaf K content, K application in early stage had some effect on leaf K level and less effect on the leaf yield. K application in later growth stage growth is very important to increase the leaf K content, and split application of K fertilizer was also suggested.
下載: