Study On The Formation Of Yield And Quality Of Flax Fibre

Flax fibre was one of the plant fibres.The process of the differentiation and development of fibre cell was the formation process of the yield and quality.At present,the physiological mechanism of the differentiation and development of fibre cell is not explicit.It is not clear that how does the environmental condition regulate the differentiation and growth of flax fibre and effect the yield and quality of flax fibre,hence,it had not only instructive meaning to other kinds of bast fibre crop but also important meaning to improve the yield and quality of flax fibre by regulating environmental condition.The study was composed of sowing date experiment and varieties experiment, we adopted Viking (early-mature and high-fibre cultivar) and Heiya14 (late-mature and mid-fibre cultivar) in sowing date experiment and 12 cultivars which were widely used in practice and new cultivars and were introduced from abroad in the experiment of varieties,in order to reveal the objective laws of the development of fibre cell and probe into the influence of the formation of yield and quality by weather factors.It showed that the development of fibre cell in stem had its own independent stage, occured orderly with the leaf occurring and had order in time and space at the same time,and also the developmental stage of the single fibre cell overlapped each other in different leaf places.Lacertus had fixed in initial stage of differentiation of fibre cell,so,it could't change with the developmental process.The quantities of lacertus and fibre cell increased with moving top of leaf places,then,they arrived the maximum value and declined at last.The increased process of fibre cell wall was quantity character,controlled by many genes,and was influenced largly by weather factors. Except stem bottom.in other leaf places,the increased process of fibre cell wall thickness in the No.â…£, â…¤ sowing date was mainly in the early development period,however,that in the No.â… ,â…¡,â…¢ sowing date was mainly in the late developmental period (after visible bud phase).It was not obvious difference in different sowing date. The quantities of lacertus and fibre cell in the No.â…£,â…¤ sowing date fewer than those in the other three sowing date, so was the diameter and cavity of fibre cell. In stem bottom.the quantity of fibre cell was the fewest,and fibre cell was the largest and the cavity of cell and the cell wall thickness was large.It was an important condition to improve dry matter weight and straw yield which easured adequate growth condition and sufficed growth demand to plant.Weather factors influenced straw yield regularly.The straw yield of early-mature cultivarViking in the No.â…¤, â…¥, â…¢ sowing date higher than that in the No.â… ,â…¡ sowing date in two years,and the straw yield of late-mature cultivar Heiya14 in the No.â…¤, â…£, â…¡ sowing date higher than that in the No.â… , â…¢ sowing date ,but it hadn't obvious difference among the No.â…¡,â…¢, â…£ sowing date and the No.â… ,â…¡, â…¢ sowing date to Heiyal4.Furthermore,the dry matter weight appeared that the No.â…¤ sowing date was the most to the two cultivars in continous two year.namely, the No.â…¤ had the highest straw yield.It had different requirement in different developmental stage to flax,and the requirement appeared high similarity in the same developmental stage between Viking and Heiya14.It showed that the influence to the fibre yield of weather factors was consistent in all developmental phase except quick-growth phase.To one variety.it's fibre ingredients content influenced the strength and division degree on the contrary.namely.one ingredient was benefit to strength and disbenefit to division degree at the same time.Otherwise, hemicellulose content showed positive correlation with strength,and cellulose content showed negative correlation with pliability,and pectin content showed contrary action with the fibre quality to early-mature cultivar Viking and late-mature cultivar Heiya14.The anatomical character of fibre cell influced strength, division degree and pliability contradictorily.that is,when one anatomical character was benefit to strength,and was not benefit to division degree and pliability.By two year's experiment,we considered that keeping adequate proportional area in national cultivars in Heilongjiang province could reduce fluctuation to yield by considering fully the yield and quality of flax.Early-mature varieties could sow adequate latly,and late-mature varieties could sow adequate early.