Effects Of Key Cultivation Measures On Flower Bud Differentiation Of Flue Cured Tobacco K326

In order to find out the effect of different cultivation measures on flower bud differentiation of flue-cured tobacco,K326 was used as the test material to study the difference of flower bud differentiation process between different transplanting period,fertilization amount and planting density on flue-cured tobacco variety K326,and the main agronomic traits As well as the relationship between intrinsic chemical substances and flower bud differentiation.The results show:1.with the transplanting period delayed,flue-cured tobacco into the various growth period,flower bud differentiation of the period of time are correspondingly delayed,differentiation is also relatively short duration,the whole field growth period was shortening;and transplanting period of flower bud differentiation The results showed that the first stage of the first leaf stage was the same as that of the first inflorescence primordium,which had a slight effect on the differentiation period of the male and female buds to the pollen mother cells.There was no significant difference in the other stages The flower bud differentiation stage was from 6 days to10 days after transplanting,and the pollen development stage was from 17 days to 18 days after 6 days and 10 days after transplanting.Lasted 6d-7d,the differentiation lasted 24d-25 d.Indicating that transplanting sooner or later affect the flue-cured tobacco into the growth period and then also affect the time to enter the flower buddifferentiation period,the later transplanting,the earlier the seedlings,the sooner the group,the earlier bud differentiation,the longer the differentiation,tobacco The sooner you mature,the later the transplant is the opposite.The effects of different transplanting stages on the main agronomic traits(leaf number,plant height,maximum leaf length,maximum leaf width,maximum leaf area)at the beginning and the end of floral buds were significantly different The best,followed by April 25,again for the April 15,the last for the April 10;tobacco stem roots,stems,leaves dry matter accumulation,nitrogen,phosphorus and potassium accumulation and dry matter and total nitrogen and phosphorus Accumulation rates were shown April 20> April 25> April 15> April 10.The results showed that in the stage of flower bud differentiation,the appropriate postponement of transplanting was beneficial to the growth of tobacco plants,so that the agronomic traits were good,and dry matter and N,P and K were accumulated,but the nutrient organs transported to the flower buds,Conducive to seed production.2.With the increase of planting density,the growth time of tobacco plantlets reached the time of flower bud differentiation,and the planting density had no effect on the flower bud differentiation process.The effect of planting density on the growth period of flue-cured tobacco K326 was mainly in the budding period.Period had no significant effect,the whole field growth period is 131 d.The results showed that the effect of planting density on flower bud differentiation was sooner or later,and the density of flower buds was earlier than that of buds.The earlier buds were earlier,the earlier the buds were ripened;the flower bud differentiation time of different planting densities was 35 days after transplanting And the pollen development stage lasted for7 days,and the flower bud differentiation lasted for 24 days.The pollination stage was 7 days after the budding stage,and the flower bud stage was 24 days.The effects of planting density on the main agronomic traits(leaf number,plant height,maximum leaf length,maximum leaf width and maximum leaf area)of flue-cured tobacco were the best at 900 and 667 m~2 at the beginning and the end of flower bud differentiation,followed by 1100 plants / 667m~2,and finally 1300 / 667m~2.Indicating that the planting density of 900 / 667m~2 may be conducive to yield,planting density of 1300 / 667m~2 may be conducive to seed production.3.with the amount of fertilizer increased,the tobacco plant into the group period,flower bud differentiation time corresponding to each time,into the bud stage,the lower leaves mature stage and the upper leaves of the mature period of time delay,flower bud formation period,flower bud differentiation,The effect of fertilizer application on flower bud differentiation was mainly in the first bract stage of flower bud formation stage to the first stage of inflorescence primordium formation.The flower bud differentiation initiation time of different fertilization was And the pollen development stage lasted for 6 days,and the flower bud differentiation lasted from19 d to 24 d.The pollination stage was 6d-24 d,and the pollination stage was 6d-24 d.The results showed that the effect of fertilization on the growth period and flower bud differentiation of flue-cured tobacco K326 was higher.The higher the amount of fertilizer,the earlier the flora was,the earlier the bud differentiation began,the later the budding,the earlier the maturation,The longer the differentiation,the longer the growth period,the smaller the amount of fertilizer is the opposite.The effect of fertilizer application on the main agronomic traits of flue-cured tobacco was the best at 5kg / 667m~2,9kg / 667m~2 at the beginning and the end of flower bud differentiation,which indicated that the higher the fertilization amount might be more favorable for flower bud differentiation.The results showed that the K326 could be transplanted from April 15 to 20,and the planting density was 900 plants / 667m~2.The growth rate of the flue-cured tobacco was the highest,,Fertilization amount of 5kg / 667m~2 to 7kg / 667m~2;from the seed production point of view,it is recommended that the area of planting K326 in the April 25 transplanting,planting density of 1300 / 667m~2,fertilizer 9kg / 667m~2.