Effects of Different Transplanting Time on Yield and Quality of Flue-cured Tobacco in Lancang County
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[Objective]The aim was to determine the best transplanting time of flue-cured tobacco in Lancang County. [Method]Three transplanting time,April 20,30 and May 10,was designed,and then investigated their growth,development and yield. [Result]Transplanting in April 20 had the longest growth period,was in favor of tobacco root growth,promoted the growth of overground parts of tobacco plants,had the better agronomic traits,promoted the synthesis of tobacco internal compounds,and then yield improved. Otherwise,transplanting in April 20 had stronger tobacco plants because of longer growth period,so the disease was relative lighter; the mature time of transplanting in April 20 was earlier because tobacco plants was transplanted earlier,so they avoided parts of rain weather at later growth period to decrease the later stage diseases; the mosaic of transplanting in April 20 was less at the earlier stage,so brown spot was decreased effectively at the later stage. [Conclusion]In the suitable time,early transplanting improves yield and internal quality of tobacco leaves. The suitable transplanting time of flue-cured tobacco was April 20 in Lancang County.Keywords:
Transplanting
Curing of tobacco
Harvest time
Cultivation of tobacco
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【Objective】Reasonable transplanting period of Qingjiangyuan flue-cured tobacco in Lichuan tobacco-growing area was determined in order to provide references for improving cultivation technology. 【Method】With Yunyan 87 as test material, a slew of traits including growth,development,economic characters, chemical components, tobacco smoking quality at different transplanting periods were analyzed in 2009-2011. 【Result】After transplanting 35 or 50 days in 2010, plant height, number of blades and length of leaf under T3(May 21) were remarkably higher than those of other treatments. After transplanting 35 or 50 days in 2011, plant height, number of blades and length of leaf under T3(June 4) and T2(May 25) were relatively better. In 2009, tobacco leaf yield, production value, the proportion of top and middle-level tobacco leaves and average price in CK treatment were the highest(May 13). The order of tobacco leaf yield, production value, the proportion of top and middle-level tobacco leaves and average price was T4(CK,May 14)T3T2T1 and T2(May 25)T4(CK,May 15)T3T1. Between May 13 and May 25, total chemical composition content and sensory evaluation quality of Yunyan 87 leaves were relatively better. 【Conclusion】The transplanting period of mid-May to late May was more suitable in Lichuan tobacco-growing area.
Transplanting
Curing of tobacco
Tobacco leaf
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A field experiment was conducted to study the effect of transplanting periods on growth and development,agronomic characters,economic benefit,sensory taste,physical properties,conventional ingredients,pigment and aroma component in flue-cured tobacco leaves.The results showed that advancing or postponing the transplanting periods made the maturity and seedling recurrenting stage prolong or short firstly and root extending stage secondly.It had less effect on vigorous growing stage; The agronomic characters,economic benefit and sensory taste were the best if transplanting from April 28th to May 5th.With postponing the transplanting periods,protein increased in general,reducing sugar and total sugar increased firstly and then decreased and the contents were the highest in the middle leaves,potassium element had the same law with reducing sugar and total sugar,and sugar-nicotine ratio increased.The conventional ingredients was coordinate if transplanted from April 28thto May 12th;The four kinds of aroma components were the highest when transplanting from April 28thto May 12th and there was a significant difference between them.
Transplanting
Curing of tobacco
Reducing sugar
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A study was carried out to study the effects of transplanting date on the growth,yield and output value of flue-cured tobacco in high altitude area of Longshan county in 2010.The results showed that the yield,high class leaves percent,average price and output value of flue-cured tobacco were higher,while the disease incidence was lower when transplanted on May 10th.If delayed or advanced the transplanting date,the yield,high class leaves percent,average price and output value of flue-cured tobacco were decreased,while the disease incidence was increased.
Curing of tobacco
Transplanting
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To determine the best transplanting time and improve the quality of flue-cured tobacco in Shuangjiang county,Lincang city,the effects of different transplanting time(2 days around May 1,May 7,May 15) on tobacco growth,economic characters and quality were studied. The results showed that the tobacco botanical characters,economic characters and leaves quality were decreased after topping with the transplanting time delayed. And it behaved dwarf plant,smaller average leaf areas,decreased 1st-class tobacco proportion and average price. The change of the comprehensive evaluation index of chemical components was not obvious,and sensory quality of upper,middle and lower leaves were reduced. According to the practical production practice,high yield and good quality of tobacco were got when transplanting time was about May 1.
Transplanting
Curing of tobacco
Harvest time
Topping
Cultivation of tobacco
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To study the planting modle of burned sugar aroma style flue-cured tobacco,a field experiment was conducted by a complete stochastic design.The effects of transplanting time and planting density on the agronomic,economic characters and quality of flue-cured tobacco were investigated.The results showed that with the delay of transplanting time,the growth progress of the flue-cured tobacco was lagged,the total growth period was to shorten.if the planting density was higher or lower,the yeild and output value were reduced.With early transplanting time,the aroma quality,burned sugar would be to lessen.If the transplanting time was delayed,the sensory quality was reduced.There was no significant difference among planting density in aroma quality.But the high-density planting could reduce the sensory quality.Therefore,in the same area of burned sugar aroma style flue-cured tobacco,the best appropriate transplanting time was 28 th,April,the density planting was 16500plants/hm2.
Transplanting
Curing of tobacco
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For exploring the effect of flue- cured tobacco yield and quality on different seeding time,the paper use 4 different seeding time to examine the quality of seedling,the index of tobacco growth and development during the field period( from transplanting to budding),and the index of flue- cured tobacco yield quality. The result was shows as follows: comparing with other treatment,the growth period of tobacco seedling which sowed on 15th December was suitable,and the surviving rate of seedling was 94%. There were 13 effective leaves on 40th day after transplanting,the height of plant and stem diameter was 88 cm and 8. 8 cm,respectively. There was significant difference between T2 and other treatment; the color of leaf by roasting was orange,good maturity,there was higher synthesis score in the T2 than other treatment. Therefore,to appropriate delay the seeding time can significantly improve the quality of tobacco seedlings,increase output,and improve the quality of tobacco leaf by roasting.
Transplanting
Curing of tobacco
Topping
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In order to evade effectively adverse weather conditions in the actual production of flue- cured tobacco,such as low temperature stress in the early phase and heat forced maturity in the later,the field experiment was conducted to study the effects of different transplanting period and cold- resistant agent on tobacco growth and yield. The result showed that the tobacco leaf number was much more,and the leaf area was moderate when transplanting seedling under plastic film mulching 5 days in advance,while the leaf number was slightly less,the leaf area was the largest when transplanting under the plastic film mulching 10 days in advance. Spraying cold- resistant agent alone could cause slender leaves. It was propitious to enhance the proportion of better- than- average tobacco and the yield when transplanting earlier. and spraying cold- resistant agent.
Transplanting
Curing of tobacco
Cultivation of tobacco
Plastic film
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In order to explore the best transplanting dates in high altitude area,an field experiment was carried out to investigate the effects of transplanting dates with plastic film on tobacco yield and leaf quality.The results showed that earlier transplanting increased seedling survival rate,and advanced every growth stages and leaf mature time about 5 days,and prolonged field growing time for 4 days,improved the agronomic properties,cured leaf appearance quality,the conformity of leaf chemical composition,the smoking quality,and economic indices of leaves.The early transplanting in high altitude region under plastic film provided better growth condition of plant and leaves,and resulted in normal mature and higher yield and better quality of leaves.
Transplanting
Cultivation of tobacco
Plastic film
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Field experiments with fue-cured tobacco variety Cuibi 1 were carried out to study effects of transplanting time on growth and quality. Results showed that delayed seeding transplantation helped to speed up growth even when root extension period was shortened.Yield and quality were increased when transplanting date was delayed until February 15th, while decreased when transplanting date was delayed until March 8th. No signifcant effects on average price and rate of top quality leaves were found. Delayed transplanting date helped to reduce content of Nicotine and total nitrogen, while increased the ratio of reducing sugar to nicotine and the ratio of total nitrogen to nicotine. No difference was found as for content of total sugar, reducing sugar, potassium and the ratio of reducing sugar to total sugar.Early planting was also favorable for sensory quality.
Transplanting
Reducing sugar
Curing of tobacco
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[Objective]The aim was to study effects of climatic factors on style of flue-cured tobacco.[Method]The effect of transplanting time on growth,quality and style of flue-cured tobacco was studied in Nanxiong tobacco growing areas.[Result]The results showed that delayed transplanting date helped to speed up growth of tobacco,the field growth period of tobacco was shorten,the agronomic traits of tobacco increased; With transplanting dates delaying,the economic traits of tobacco increased first and then decreased; The single leaf weight,leaf mass and leaf thickness increased first and then decreased,the rate of leaf stalk decreased first and then increased; The content of total sugar,reducing sugar and the ratio between sugar and nicotine increased,the content of nicotine decreased; The aroma quality,concentrationand momentum of tobacco decreased,the characteristics of rich flavor style tobacco weakened.[Conclusion]Early transplanting could extend the field growth period of tobacco,early transplanting was also favorable for the characteristics of rich flavor style tobacco in Nanxiong tobacco growing areas.
Transplanting
Curing of tobacco
Stalk
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