土壤水分狀況與烤煙生長(zhǎng)及磷肥利用的關(guān)系
Relationship of soil moisture with tobacco growth and utilization of phosphorous fertilizer
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摘要: 研究表明,，烤煙生長(zhǎng)期內(nèi)水分狀況的豐缺直接影響煙葉生長(zhǎng)、產(chǎn)量和對(duì)磷肥的利用率,。對(duì)葉片生長(zhǎng)影響的大小順序?yàn)椋荷喜咳~片>中部葉片>下部葉片。所受干旱程度越嚴(yán)重,，對(duì)葉片生長(zhǎng)的抑制作用越明顯,，產(chǎn)量和磷肥利用率下降越大。生育后期遭遇嚴(yán)重干旱脅迫,，對(duì)其葉片生長(zhǎng),、產(chǎn)量和磷肥利用率的影響最大，生育中期受其影響較小,，而在生育前期則幾乎不受影響,。Abstract: The results of the experiment showed that leaf growth，yields and the utilization of phosphorous fertilizer were affected by soil moisture. Based on the leaf position, the effects of soil moisture on leaf growth were upper leaves > middle leaves > lower leaves. The more severe the drought was, the more seriously the leaf growth,yields and utilization of phosphorous fertilizer were affected. The effects of severe drought on tobacco was biggest in late growing season,，smaller in middle season,，no or very weak in early season.
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