Effect Of Potassium Fertilizer On Growth Characteristics And Fiber Quality Of Flax

Linum usitatissimum L belongs to the flax(Linaceac)flax(Linum),annual herb.Flax fiber is not only strong and flexible,but also its spinnable number is high,and flax textile has the unique advantages of strong hygroscopicity,large tensile strength,small conductance,not easy to burn,antiseptic and antiseptic,so it is favored by people all over the world.Over the past 5 years,China has imported about 110 thousand tons of hemp per year in Europe,and about 80% of Europe has sold hemp and two sold to China.The trade volume of linen yarn,flax germ cloth and linen products in China accounts for more than 60% of the total trade in the world,and it has become a big importer of linen raw materials and a big producer of linen products.Lodging is an important trait of flax.It is an important reason for flax industry to resist lodging.Potash fertilizer is of great significance in preventing the lodging of flax stems,enhancing the strength of flax fiber,increasing fiber yield and reducing diseases.Under two conditions of single application of potash fertilizer and combined application of nitrogen and phosphate fertilizer,the variation of the growth of flax and the difference of agronomic characters in the growth period were studied by setting the different potash fertilizer gradients.The suitable dosage of potash fertilizer and the suitable concentration of low potassium stress were screened under the conditions of potted planting and the yield of linen fiber under the pot culture condition and the yield of flax fiber were studied.The change rule of fiber quality was studied.(1)During the growth period of flax,the flowering period is a sensitive period of potassium,the suitable amount of fertilizer makes the accumulation of potassium increase rapidly,but too little and too much potash fertilizer is not conducive to the accumulation of potassium in this period.The amount of sensitive fertilizer for potash fertilizer is 105kg/ha.(2)and two fertilization methods can increase the thickness of flax stalk,low potassium fertilizer can increase plant height and process length,but excessive application of potassium fertilizer can inhibit the growth of plant height and long process.Potassium fertilizer had little effect on branching number,capsule number and grain number per plant,but there was no difference between treatments,but it could reduce 1000 grain weight.(3)Compared with the yield and other characters,the single application of potassium fertilizer is stronger than the material with nitrogen and phosphate,and the lodging degree of flax is reduced to the lowest when the amount of 105kg/ha potash fertilizer is used.(4)From the fiber quality,it can be concluded that proper amount of potassium fertilizer can improve the strength of flax fiber bundles,and the strength of 105kg/ha fiber is the largest.The application of 105kg/ha potassium fertilizer can reduce the lodging grade of flax and maximize the fiber strength.(5)Through correlation analysis,the factors related to lodging were classified into 3 categories:the first type and plant growth factors: plant height,processing length and stem diameter.The second type is potash fertilizer effect: the amount of potassium fertilizer has a certain effect on the lodging resistance of flax.The third major categories are the factors of the head and heavy foot in the green ripening period: the number of per fruit,the number of capsules,the number of branches,the number of grain per plant,the number of grain,and the main factors affecting the weight of the single pot fiber are plant height and process length,and the effect of potash fertilizer is the lowest.