The Influence Of Promote Rootagents On The Development, Yield And Quality Of Flue-cured Tobacco

The pot experiment was put in Henan Agricultural University Maozhuang farm,studied about the effects of humic-acid potassium, malic acid, ferrous sulfate, andpromote root abt four kinds of agents on the growth,yield and quality of flue-curedtobacco. The pot experiment systematicly analysised a number of indicators in thegrowth of flue-cured tobacco. The results showed that:(1)The effects of different Promote root agents on root development offlue-cured tobacco: The results in the order was malic acid> KH> ABT> ferroussulfate. The dry root matter of T2(malic acid) treatment in every period was thebest, followed by treatment T4(ABT) and T1(potassium humate) processing.(2)The effects of different Promote root agents on agronomic traits of flue-curedtobacco: Thirty days after transplanting,the height and girth of the plants in T3(ferrous sulfate) treatment and T1(potassium humate) treatment were greater than theother treatments. The number of plant effective leaves of T2(malic acid) treatmentand T3(ferrous sulfate) treatment were more than the other treatments.The section spacing of T1(potassium humate) processing and T4(ABT)tobacco processing increased faster in the early. And T2(malic acid) treatment and T3(ferrous sulfate) treatment has maintained a stable growth trend.(3)The influence of different promote root agent on the chemical constituents offlue-cured tobacco: the tobacco nitrate reductase of T1(potassium humate) processingand T2(malic acid) treatment were highest activity. And T2(malic acid) treatmentwas the best. The tobacco amylase activity of T1(Potassium humate) T2(malic acid)processing were higher than the others. The starch content of T2(malic acid)processing and T1(potassium humate)treatment had a larger decrease. The starchcontent of T2(malic acid) processing was minimum.(4)The influence of different promote root agent on the content of chemicalcomposition of the flue-cured leaf: The nicotine content of T1(humic acid potassium)treatment was minimum, than followed by T2(malic acid) processing. And Thenicotine content of CK was highest. T4(ABT) treatment had the highest protein content in all treatments and T2(malic acid) processing tobacco had the lowestprotein content. The total sugar content of T3(ferrous sulfate) processing was thehighest. The reducing sugar content of T1(humic acid potassium) treatment, T2(malic acid) treatment and T3(ferrous sulfate) treatment were higher than CK.The potassium content of T1(humic acid potassium) treatment was highest,Followed by T2(malic acid) treatment. The ratio of nitrogen to nicotine of thetobacco in T2(malic acid) processing was the best. The treatment which used malicacid had a better role in the coordination of the chemical components of flue-curedtobacco. The calcium content of the treatment which used promote root agent weresmaller than that of the control. In all different promote root agent, the influence ofT2(malic acid) processing was the highest. T4(ABT) treatment had the mostsignificant role in the improvement of the magnesium content of tobacco. T1(potassium humate) processing, T3(ferrous sulfate) treatment and T4(ABT)treatment can significantly increase the iron content of the tobacco. And the influenceof T3(ferrous sulfate) treatment was the most significant.The boron content of T3(ferrous sulfate) treatment and T1(potassium humate)treatment were significantly higher than CK. The manganese content of T1(potassium humate) processing was the highest,significantly higher than othertreatments and followed by T2(malic acid) treatment. The zinc content of T1(potassium humate) treatment and T4(ABT) treatment were significantly higher thanT2(malic acid) treatment，T3(ferrous sulfate) treatment and CK.The noid content of4treatment were greater than the control. The content ofT4(ABT) treatment were significantly higher than the other,and followed by T2(malic acid) processing. The petroleum ether extract content of T3(ferrous sulfate)processing and T4(ABT) treatment were higher.(5)The influence of different promote root agent on the production of flue-curedtobacco: The production of tobacco plants which used promote root agent wereimproved. The tobacco plants which used malic acid had a highest yield,218g perplant. The production of tobacco plants in T2treatment was significantly higherthan the CK,than followed by T1(potassium humate) processing.