Effect Of N P K On Yield And Quality Of Flax Fibre

The yield and quality of flax fibre are determined by genotypes, and also by environment andcultivated conditions. The status of providing nutrient is very important, and nutrient adjusting is animportant means to control flax growing. Fibre flax like mild climate, its growing period is short,and the ability of absorbing fertilizer is poor because its root is finespun. As integrant mass elementfor flax's growth, N P K attracts attention have been regarding by of researchers. Three factorquadratic saturation and D-excellent design were adopted in order to overcome the disadvantage ofsingle factor in the experiment. Two cultivar, AG(mid-yield and high fibre content) and Heiya14(high yield and mid-fibre content), were selected with a view to the possible difference betweengenotypes, and planted in potted experiment and plot experiment. This article aimed to find effectof fertilizer on fibre growth, N P K accumulation, formation of fibre yield and quality. The resultshowed:1. N-fertilizer can increase diameter of stem, and significantly increase the number of fibrecells, enhance the diameter of fibre cell and thickness of cell wall, but decrease the number of fibrebundle; P-fertilizer can also increase diameter of stem, and has more significantly effect to enhancethe number of fibre cells, at the same time, it has significantly effect to make cell wall thickness forAG, but it is not significantly for Heiyal4. K-fertilizer decrease diameter of stem, and has fewereffect to enhance number of fibre cells, but it has effect to make cell wall thickness and enhancediameter of fibre cell especially in the end of growing period.2. N-fertilizer and P-fertilizer can enhance flax height, and K-fertilizer has fewer effect onheight, cooperating with P N K can reach better effect. N-fertilizer can increase leaf area,significantly enhance accumulation of dry material, enhance area of photosynthesis, it can reachbetter effect if cooperating with P K; P-fertilizer can help to absorb N, so it should be used with N-fertilizer to enhance accumulation of dry material; Only use K-fertilizer is bad to enhancing area ofphotosynthesis, and effect accumulation of dry material, accordingly deduce original stem yield.3. N P K accumulation of flax change as "S" curve, it can express by Y=K/(1+e^a-bx). theranking of finally accumulation is: N＞K＞P. The measure of absorbing P is slow in early period,and go quickly after anthesis. Flax need K in all period, the measure is corresponding to N.4. Following N level enhancing, N P K accumulation increase in different growing period.Enhancing P level can promote N P K accumulation except using superfluous P in slowly-growthand quick-growth stage; K has fewer promoting effect in slowly-growth and quick-growth stage and anthesis, superfluous K can restrain flax growing in mature period.5. Effect from N-fertilizer to yield can be described as a parabola; effect from P-fertilizer toyield is near linearity; effect from K-fertilizer to yield can be described as a converse parabola.using N P K together can get best effect; when use 44.5 kg N, 135 kg P₂O₅ and 90 kg K₂O, theyield of Argos can reach 10123.33 kg/hm².6. P-fertilizer and K-fertilizer are avail to promoting fibre content, but only using N-fertilizerwill reduce fibre content.7. The effect from N-fertilizer to pectin can described as a parabola, P-fertilizer can promotepectin content, and K-fertilizer can restrain pectin; N P K can restrain hemicellulose; N-fertilizer goagainst formation of cellulose, little P-fertilizer is avail to formation of cellulose, K-fertilizer canpromote formation of cellulose; N-fertilizer and P-fertilizer can promote lignin, and effect fromK-fertilizer to lignin will first fall and increase later.8. Effect from N-fertilizer to intension can be described as a converse parabola, P-fertilizer hasa restrain effect on intension, and K-fertilizer has a promoting effect on it. As the N P level increase,the flexibility of flax fibre increase, and the flexibility of flax fibre decreases as K-fertilizer levelincrease.