The Research Of The Fiber Quality And Spinnability Of Different China-hemp Varieties At Heilongjiang Area

China-hemp fiber is one of the earliest spinning fibers that people used,China-hemptextiles have better function of resistance of static, prevention of ultraviolet radiation,antisepsis and restrain bacterium. Due to the strong moisture absorption of China-hemp fiber,the electric charge accumulates uneasy, so its fabric has better resistance of static. It is adaptto develop summer products especially. China-hemp have soft handle, and without lancinatingand pruritic feeling do not like ramie, so it is adapt to develop close-fitting fabric.The area that adapts to grow China-hemp in our country is quite wide, and the variety isalso plenty. The planting of different China-hemp varieties adaptable area has definitelocalization. There are differences on the ability of resistance of disaster, output of a unit ofarea, gain rate of fiber, the gain rate of carding, chemistry component, spin ability for differentkinds grow in the same area. So, selecting the optimal variety of China-hemp at one area hassignificant guidance meaning on increasing the quality and spinnability of China-hemp.The paper studies the China-hemp plant in the Heilongjiang area, and the eximiousChina-hemp varieties comes from home and oversea.Because the special climate, theChina-hemp only grows one time every year. Seedtime is the main factor for the fiber qualityan spinnability, so the paper studies on it,finally, choose the best seedtime.This paper aims at the research in growing China-hemp in Heilongjiang province,including Zhongfu1#、Yunma1#、Luma NO.1、Gansu Qingshui、Ningxia China-hemp andUSO from Ukraine，six varieties.It tracked the whole process of China-hemp’growwing, andfiltrated China-hemp feed and field,and integrated analysis on the ability of resistance ofdisaster, the growing cycle, the output of a unit of area, the gain rate of bast, long fiber ofChina-hemp and physics guide line of carding in Heilongjiang province. The research onspinnability of wet spinning will study from the gain rate of carding. We educed the optimalplanting variety of China-hemp finally which the quality of fiber and spinnability are allbetter.All the same time, the paper does a contrast trail on grown-time basis on experience in Heilongjiang area.It contrasts four times, April15, April25, April l5and April15, and thebest grown-time is April25.The conclusion of this paper is the optimal variety of China-hemp which fiber used isZhongfu1#.The planting date of Zhongfu1#in Heilongjiang province is commonly at thebeginning of April, and harvest at the middle or last ten-day of August. The planting densityof Zhongfu1#is about1.2million individual plant per hectare. The growing cycle is about100days. The output per hectare is about8850kg. The long fiber has soft handle, highstrength, and good shine.