楊漢夫 刁朝強 周建云 魏光鈺 艾復清
摘要:為探究移栽期對貴煙5號葉片主要生長特征的影響,設置4個移栽期處理對貴煙5號葉片出葉速度、干物質及氮素積累進行研究。結果表明:試驗中所有處理的出葉速度、干物質積累速率、氮素積累速率在整個生長過程中均表現出先增后減的趨勢;隨著移栽期的推后,生長過程中平均出葉速度表現為T2>T3>T4>T1,70d時葉片數T2為334片/株,較其它處理多02片/株~10片/株;平均干物質積累速率表現為T2>T3>T1>T4,70d時T2為1764g/株,較其它處理多49g/株~183g/株;氮素平均積累速率為T2>T3>T4>T1,70d時,T2為255413mg/株,較其它處理高6589mg/株~24037mg/株。綜上所述,葉片主要生長特征T2表現較優,T3次之,T1、T4表現較差,因此,從有利于葉片生長的角度看,建議貴煙5號在貴陽的移栽期為4月15日~4月20日。
關鍵詞:貴煙5號;移栽期;葉片;生長特征
中圖分類號:S572
文獻標識碼:A
文章編號:1008-0457(2017)02-0078-04國際DOI編碼:10.15958/j.cnki.sdnyswxb.2017.02.017
Abstract:To explore the effects of transplanting time on the main leaf growth characteristics of the flue-cured tobacco Guiyan 5, four transplanting stage treatments on Guiyan 5 were set up to study the leaf emergence speed and the accumulation of dry matter and nitrogen. The results showed that the leaf emergence speed, dry matter accumulation rate and nitrogen accumulation rate in the whole growth process expressed the trend of increasing initially and decreasing later. As the transplanting stage gradually moved later, the average leaf emergence speed was T2 > T3 > T4 > T1, with 70 d leaf number of T2 as 33.4/plant, which was 0.2 ~ 1.0/plant more than other treatments. Average dry matter accumulation rate was T2 > T3 > T1 > T4, with 70 d dry material of T2 as 176.4 g/plant, which was 4.9 ~ 18.3 g/plant more than other treatments. Average nitrogen accumulation rate was T2 > T3 > T4 > T1, with 70 d nitrogen accumulation of T2 as 2554.13 mg/plant, which was 65.89 ~ 240.37 mg/plant more than other treatments. To sum up, the performance of the main leaf growth characteristics of T2 is optimal, following in the order of T3, T1, and T4. In order to achieve optimal leaf growth, it is suggested that the transplanting time for Guiyan 5 is 15 ~ 20 April in Guiyang.
Key words:Guiyan 5; transplanting time;leaf; growth characteristics
烤煙是一種葉用經濟作物,葉片既是生產的主要產品,也是進行光合作用的主要器官,烤煙葉片生長除受遺傳因素、生態條件的影響外,栽培因素也對其有重要影響,而移栽期是栽培因素的一個重要環節,通過改變烤煙移栽期,可以改變不同生育期溫度、降水、光照、積溫等微氣候條件[1-3],對烤煙的葉片數、干物質積累、氮素積累產生影響,進而影響到煙葉的產、質量。貴煙5號是貴州省煙草科學研究院2011年選育的一個新品系,目前對其葉片生長規律的研究還未見報道,因此,研究移栽期及其葉片生長的關系對該品系適宜移栽期的確定具有指導意義。
1材料與方法
11試驗地概況……p>