不同密度对苎麻产量影响的相关分析

试验结果表明,当年种植的一龄麻,以亩栽4000蔸的产量为最高,亩栽2000蔸的为最低。增产的主要原因是有效株数多,麻株高。二龄麻以亩栽3000蔸的为最高,增产的原因是在合适密度下,每亩有效株数达到最多,而其他产量构成因素如株高、茎粗、皮厚和出麻率等无明显下降。通径分析表明,在较稀密度下,各产量构成因素影响产量的顺序,应为茎粗>株高>出麻率>皮厚;在较高密度下,则是茎粗>出麻率>株高、皮厚。说明在各种密度下,增加茎粗是提高产量的重要因素。

RELATION AND PATH COEFFICIENCY ANALYSIS OF DIFFERENT DENSITY AND YIELD OF RAMIE

Result of this test shows that the yield of ramie,planted this year,is the highest at 4000 clumps/mu,the middle at 3000 clumps/mu and the lowest at 2000 clumps/mu.The situation is caused by more effective plants and higher plant. The highest yiald of 1st.crop of 2nd.year is getted at 3,000 clumps/mu.The main cause is that the highest effective plants is teached under suitable density, however,other determinants of yield,for example,plant height,stem thickness, skin thick and productivity are not decreased.There are positive relation but no interact among these factors. Path analysis also shows that the contribute of different yield determinants are stem thickness>plant height>productivity>skin thick at lower density and stem thickness>productivity>plant height>skin thick at highter density.It means that higher stem thick makes higher yield under different densities, higher plant also play same role under lower density and productivity should be put second place under higher density.