苎麻种植密度对纤维产量质量的影响

EFFECTS OF PLANT DENSITY OF RAMIE ON FIBER YIELD AND QUALITY

对苎麻(Boehmeria nivea)“芦竹青”品种新植麻园的两年试验结果表明,无性繁殖亩栽3000蔸、有性繁殖亩栽12000株获得高产,两者二龄麻亩产量分别为152.02公斤和132.36公斤.且单纤维支数基本符合纺高档纱的要求。其高产的生理原因是:群体协调.叶面积系数在黑杆始期达最高值为7左右:光合强度和根系活力较强:干物质生产,一龄三麻前期温度高,生长和积累快.后期温度低,生长和积累慢.相反,二龄头麻前期温度低,生长和积累慢.后期温度高。

The results from this experiment on a variety of Ramie,called“Lu Zu Qing”, for two years states that 3000 plants per mu in nonsexual propagation and 12000 in asexual propagation are suitable planting density to get high fiber yield,ie 152.02 Kg per mu and 132.36 Kg per mu respectively,and their fiber count nearly meets the requirement of high quality yarn spining.The physiological causes reaching high yield concluded coordination population and leaf area index 7 at beginning of black stem stage as well as high photosynthetic efficiency and vigorous activity of root.When the temperature became high at early the third stage of Ramie in the first year,the production of dry matter accumulated more highly than that at late the same stage when the temperature was low.Conversely,when the temperature was low at early the first stage of Ramie in the second year,the accumulation of dry matter was more than that at late the same stage when the temperature was high.